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Robocall
Robocall
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A robocall is a phone call that uses a computerized autodialer to deliver a pre-recorded message, as if from a robot. Robocalls are often associated with political and telemarketing phone campaigns, but can also be used for public service, emergency announcements, or scammers. Multiple businesses and telemarketing companies use auto-dialing software to deliver prerecorded messages (appointment reminders, booking details, etc.) to millions of users. Some robocalls use personalized audio messages to simulate an actual personal phone call.[1] The service is also viewed as prone to association with scams.[2]

As of June 2019, phone companies may, by default, block incoming robocalls.[3][4]

History

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First description

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Automated phone solicitation, i.e. robocalling, was one of the earliest applications proposed for the first microcomputers. The first documented mention of it was in the "Memo from the Publisher" by David Bunnell in Personal Computing magazine, May/June 1977. Under the heading "Personal Computing Abused", Bunnell described a presentation at the World Altair Computer Convention in March 1976 of "an intriguing business application for personal computing". The computer would sequentially dial phone numbers, play a taped voice message, and then use speech recognition to respond with additional messages as appropriate. In his "Memo from the Publisher", David Bunnell reported that "the proposal was not very well received" at the conference. It was criticized as "insensitive to the rights of personal privacy" and "could cause a public uproar".[5]

North America

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Canada

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Robocalls can be and are legitimately used by mainstream political parties in Canada to reach voters. Controversy surrounded the use of robocalls during the 2011 Canadian federal election, leading Elections Canada and the Royal Canadian Mounted Police to investigate claims that robocalls were used in an attempt to dissuade voters from casting their ballot by falsely telling them their poll stations had changed locations.[6] Elections Canada traced the origin of the automated calls to a disposable cellphone registered to a fictional name "Pierre Poutine" at a phony address from 450 area code of Joliette, Quebec, and issued a subpoena to the cellphone provider that produced a list of outgoing calls from the same number. One of the calls was to the toll-free number used by customers of 2call.ca, a subsidiary of Edmonton-based Internet Service Provider RackNine, to phone in and record their outgoing messages. The burner cell phone belonging to "Pierre Poutine" was used to contact the owner of Racknine at his personal unlisted number and gave the name "Pierre Jones". This burner phone initiated a series of automated robocalls mostly in Guelph but with a few dozen in other ridings, that targeted mostly non-Conservative voters with false voting location changes. Some voters attended what they had been led to believe were their voting locations, and sometimes destroyed their voter registration cards in anger.[citation needed]

In November 2011, the investigator served RackNine with a production order for records and had the account holder associated with the bogus calls quickly identified.[7] Investigators have also examined the Conservative Party's CIMS voter database and showed that "Pierre Poutine" used the Conservative voter database to select whom to call. Investigators have blank entries for one specific login, leading to speculation that evidence has been deleted. PayPal has also surrendered their records to investigators since "Pierre Poutine" has used a PayPal account to pay for the bill for the automated calls. The cost for these May 2, 2011, calls was $162.10, Elections Canada said in court filings. This expenditure was never reported to Elections Canada, as required for legitimate political spending.

Prime Minister Stephen Harper and the Conservative Party of Canada have denied any knowledge or involvement.[8] A Conservative party staffer resigned soon after the scandal was reported but has since come forward stating that he was not involved.[9] Elections Canada has made a statement[10] and reported to Parliament,[11] that the fraud was extensive, affecting 200 ridings in all ten provinces plus Yukon Territory.[12] The Council of Canadians, a left of centre activist group, has asserted that the robocalls may have been enough to swing the result by 4%, enough to win a number of ridings in very close races. A court challenge has been initiated by this group to overturn the results of the election in seven ridings, and initiate by-elections for the respective seven House of Commons seats.

After reviewing the investigation of the "Pierre Poutine" scandal in 2013, Federal Court Judge Richard Mosley found that election fraud had taken place in six ridings across the country but found no evidence that the Conservative party or candidates were involved. He also did not find sufficient evidence to support charges in ridings other than Guelph. As well, he indicated that the "robocalls" had not affected the outcome of the 2011 election in any riding.[13]

After a lengthy investigation of the circumstances of the scandal,[14] Michael Sona, the former director of communications for the Conservative candidate in the Guelph (Ontario) riding[15] was charged on June 2, 2014[16] with "wilfully preventing or endeavouring to prevent an elector from voting".[17][18] Sona was found guilty on November 14, 2014 [19] and was sentenced to nine months in jail plus twelve months of probation.[20] Sona was released from jail on bail after serving twelve days, pending his appeal of the sentence. However, Sona did not appeal the conviction.[15] During the trial, Justice Hearn agreed with the Crown allegation [14] that Sona had likely not acted alone.[21][22]

United States

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The federal Telephone Consumer Protection Act of 1991 (TCPA) regulates automated calls.[23] Pre-recorded robocalls must identify who is initiating the call and include a telephone number or address whereby the initiator can be reached.[24] In 2019, the United States Congress passed legislation expanding the regulation of robocalls.[25] That same year[26] there was an interim ruling that seemed to weaken restrictions on autodialers.[27]

Debt collection

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In 2015, government debt collection was exempted from the 1991 robocall restrictions; however, the Supreme Court invalidated this exception on July 6, 2020 in Barr v. American Assn. of Political Consultants, Inc. (19-631). The court decided that it was a First Amendment violation to favor "debt-collection speech over political and other speech."[28]

Political calls

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Robocalls are made by many political parties in the United States, including but not limited to both the Republican and Democratic parties as well as unaffiliated campaigns, 527 organizations, unions, and individual citizens. Political robocalls are exempt from the United States National Do Not Call Registry.[29][30] The Telephone Consumer Protection Act of 1991 (TCPA) and Federal Communications Commission (FCC) regulations prohibit anyone (including charities, politicians and political parties) from making robocalls to cell phone numbers without the recipients' prior consent.[31] The FCC permits non-commercial robocalls to most residential (non-cellular) telephone lines.[32]

Some states (23 according to DMNews) have laws that regulate or prohibit political robocalls.[33] Indiana and North Dakota prohibit automated political calls.[34] In New Hampshire, political robocalls are allowed, except when the recipient is in the National Do Not Call Registry.[35] Many states require the disclosure of who paid for the call, often requiring such notice be recorded in the candidate's own voice. The patch-work of state laws regulating political robocalls has created problems for national campaigns.[36]

California

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The first political robo calls were launched in January 1983 when business owner Tony Inocentes used his telemarketing machine from his collection agency business to announce his candidacy for the 57th Assembly District in California. He launched over 300,000 automated calls before losing the November 1983 General election to the incumbent Dave Elder. Inocentes founded the GOTV election company ePolitical USA in 1984.[citation needed]

In 2001 Inocentes invented political robo polling launching the first political robo poll on October 31, 2001 in the Lynwood, CA city council elections.[citation needed]

California prohibits any robocall unless there is an existing relationship.[37] The California Public Utilities Code §§ 2871 et seq. holds political campaigns to the same rules as other organizations making calls with an automatic dialing–announcing device.[37] The guidelines are:

  • A person must come on the line before the recording to identify the nature of the call and the organization behind it.
  • The recipient of the call must consent to the recording being played.
  • The call must be disconnected from the telephone line as soon as the message is over or the recipient hangs up, whichever comes first.

Indiana

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Indiana requires introduction of any prerecorded message by a live operator; the message may only be played if the called party grants permission.[33]

Missouri

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In September 2008, then-Missouri Attorney General Jay Nixon alerted political campaigns in Missouri that his office would aggressively enforce federal rules (Telephone Consumer Protection Act of 1991) requiring calls to include identifying and contact information.[38]

North Carolina

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Robocalls were made during the 2008 North Carolina Democratic primary, targeting African-American voters in the days leading up to the primary in late April 2008,[39] which essentially told registered voters that they were not registered.[40] According to NPR[41] and Facing South,[42] these calls were made by the organization "Women's Voices Women Vote".[43] Voters and watchdog groups complained that it was a turnout-suppression effort, and the state Attorney General Roy Cooper ordered them to stop making the calls.[43] The group stopped the calls and no further legal action was taken.

South Carolina

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South Carolina had a law prohibiting most types of unsolicited consumer and political robocalls, but in 2010, campaign consultant Robert Cahaly was arrested by the South Carolina State Law Enforcement Division, being charged for making illegal robocalls to six state house districts.[44] The automated opinion polling system asked whether U.S. Speaker Nancy Pelosi should be invited to campaign with six Democratic candidates for the South Carolina Legislature.[45] Cahaly was arrested despite having a written opinion from the state attorney general stating that he had acted within the law.[46] The charges were subsequently dismissed in October 2012.[47] After the charges were dropped, Cahaly filed a suit against state officials, claiming his constitutional right to free speech had been violated. U.S. district court judge, Michelle Childs ruled that South Carolina's anti-robocall statute was a content-based restriction on speech and therefore unconstitutional.[48]

Proposed additional regulations

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California Senator Dianne Feinstein (D-CA) introduced the Federal Robocall Privacy Act[49] in February 2008 at a Senate Committee on Rules and Administration hearing. The Act proposed to: 1) limit robocalls to no more than two a day by any one candidate, 2) mandate that candidates have accurate caller ID numbers displayed, 3) mandate that the disclosure of who is paying for the call occur at the start of the call, rather than at the end of the call, and 4) mandate that the time of the call occur not before 8 a.m. or after 9 p.m. The bill was read twice, and since it received no further action during the session, it did not become law.[50] Similar bills have been submitted in subsequent years without success.[51]

Shaun Dakin, CEO of Citizens for Civil Discourse, testified at the hearing and described how robocalls affect the lives of voters across the nation.[49] He also wrote an op-ed for the Washington Post calling for a Voter Privacy Bill of Rights in which all voters would have the right to opt out of political robocalls if they did not wish to receive them.[52]

Dakin, a former John Kerry campaign worker,[53] set up a website called Stoppoliticalcalls.org and claimed to allow citizens to opt out of receiving robocalls.[54][55][56][57] However, there is no guarantee that the registry will stop the calls and since there is no law that supports the database it is essentially an Internet petition. As mentioned above, the Robocall Privacy Act failed to become law and neither bill had provisions for a do-not-call registry for stopping robocalls.[50][58]

Despite heavy media publicity of the database, only seven politicians in the United States voluntarily pledged to respect the list during the 2008 general election cycle. Of those seven, only three made it to the general election and only Virginia Foxx (R) was successfully reelected in November 2008.

On September 1, 2009, a new regulation of the Federal Trade Commission went into effect, banning most robocalls without written opt-in from the receiver.[59] Political campaigns, surveys, charities, debt collectors, and health care providers are exempt, as are calls to businesses. Calls from banks, insurers, and phone companies are out of the jurisdiction of the FTC. In situations under federal jurisdiction, the federal law will supersede a slightly less restrictive law in the state of California.[60]

Reverse robocalling

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In June 2019 the telephony-based scambaiting community launched BobRTC.TEL, a telephone directory that tracks verified inbound telephone numbers that reach contact centers operated by known robocallers and telephone scams.[61] The service also allows logged-in users to place calls directly to scammers using the service's own telephone numbers as the Caller ID which avoids the user placing a call with their own handset, which allows callers to scam bait robocallers.

Auto warranty robocalls

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Auto warranty robocalls are a series of scam robocalls in North America originating from the Sumco Panama company.[62] The call typically begins "We're trying to reach you about your extended warranty"; it is a phishing scam intended to trick the caller into calling the provided number and then submit their credit card details to extend a non-existent warranty.

Over 58 billion of these fraudulent robocalls have been made since 2021. Beginning in July 2022, the Federal Communications Commission ordered telecom providers to cease carrying calls from the Sumco Panama Company.[62]

Suppressing unwanted and illegal robocalls

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Many robocalls are not wanted, and several methods have been developed to prevent unwanted robocalls.[63] Many countries operate do not call lists, but the lists have been ineffective[64][65] and legally problematic in some cases.[66] Consequently, a market has developed for products that allow consumers to block robocalls. Most products use methods similar to those used to mitigate SPIT (spam over Internet telephony) and can be broadly categorised by the primary method used. However, due to the complexity of the problem, no single method is sufficiently reliable. A combination of methods can be used together to provide more effective results, provided care is taken to ensure that the combination of techniques would not degrade the user experience.[67]

Solutions are available as both hardware and software products. Mobile apps are especially prevalent as they use techniques which do not require the modification of infrastructure. Many products are limited to use only on a single medium, such as traditional copper landlines, or mobile phone contracts from a specific mobile phone operator.

Blacklisting and whitelisting

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In its simplest form, this method offers the ability to prevent further calls from phone numbers, once they are known to be a source of robocalls. Many mobile apps can prevent robocalls with a user generated blacklist.

Landline call blocker in use

For landlines there are standalone call blockers which connect to the telephone. Various models work on blacklisting and whitelisting principles. Call blockers received attention from publications including Which? and Consumer Reports in the United Kingdom and United States respectively.[68][69]

In the UK BT operates a service for landlines called Choose to Refuse which allows customers to block up to 10 phone numbers of their choice for a monthly fee.[70]

A number of physical products have been developed for use with landlines. These are typically installed in homes and employ a hard coded or irregularly updated blacklist. Some models also have the function to create a user-generated whitelist.[71] Newer devices for landlines can use cloud based data to resolve the hard coded blacklist issues and allow the creation of a personal whitelist/blacklist.

Crowdsourcing

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A more sophisticated model uses crowdsourcing to build a more comprehensive blacklist of robocall numbers. A notable example of this is the app Truecaller, which requires users to provide access to their personal whitelist of genuine contacts in exchange for access to the larger crowdsourced database. In 2013, hackers gained access to Truecaller's database of known genuine numbers, highlighting the danger of centralising this information.[72][73]

CAPTCHA

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Building on the crowdsourcing model, Primus Canada launched a patented product called Telemarketing Guard for landlines in 2007.[74] It improves on previous models by including a CAPTCHA style challenge-response test.

Based on a database developed from customer feedback, it filters suspected telemarketing calls to a system which challenges callers to record their name after pressing a button. If a name is recorded, the customer's phone rings with the Caller ID of Telemarketing Guard. If they answer the phone, they are played the recording, at which point they can accept the call or decline and report it.[75]

Realtime analysis

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A major problem for the use of both blacklisting and whitelisting techniques is the practice of caller ID spoofing,[76] which is prevalent as a result of the low barrier to entry in the VoIP services market.[77]

In 2015 the Federal Communications Commission proposed a framework for the telecommunications industry in the United States, which included a validation system at network level for robocalls from SIP sources by 2017.[78] The final authentication task in the framework is the signing of all VoIP calls, which would allow carriers to reliably identify robocalls.

Until these goals are achieved, a more advanced method for blocking robocalls uses real-time business intelligence techniques to address the constantly changing identities of robocalls. With access to a large enough data sample, it is possible to create algorithms which detect call patterns without requiring reporting by users.

In 2016, both Verizon[79] and Sprint each launched their own service based on Enhanced Caller ID, which is developed by Cequint and incorporates whitelisting, blacklisting and crowdsourcing techniques.[80] For improved accuracy, it is complemented by a technology called Call Guardian developed by TNS, which performs caller behavior analysis on the 25 billion public calls they handle every year in real time.[81]

Call Authentication

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To resolve the spoofing problem that made call blocking based on caller reputation problematic, starting in mid-2017, and with intended culmination in 2019, the FCC pushed forward Caller ID certification implemented via a methodology called SHAKEN/STIR.(SHKEN/STIR (Secure Telephone Identity Revisited and Signature-Based Handling of Asserted Information Using Tokens)[63][82][83] In June 2019, the FCC adopted a rule allowing (but not mandating) phone companies to block unwanted robocalls by default, without a consumer opt-in; a rule related to source authentication was still in a public comment period.[84]

The TRACED Act, signed into law in December 2019, requires the FCC to implement Caller ID authentication, requires the FCC to report all criminal robocalls to the Justice Department, gives consumers access to robocall blocking at no charge, and increases penalties for violators.[85]

Enforcement

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The goal is to deal with the million plus complaints per year, with only about 20% involving a live caller.[86] In August 2016, a "Robocall Strike Force" of thirty companies said they would help crack down on the problem.[87]

Enforcement and fines in the United States is not a deterrence to robocallers because the United States government rarely collects any of the fines imposed by the Federal Communications Commission ("FCC"). The FCC lacks authority to collect the fines and forfeitures, the robocallers do not voluntarily pay the fine, and the US Department of Justice does not take action to collect the fine.[88]

Federal Communications Commission Orders and Declaratory Rulings

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2009

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In May 2009, in response to numerous complaints, the Federal Trade Commission asked a federal court to shut down a telemarketing campaign that has been bombarding U.S. consumers with hundreds of millions of allegedly deceptive robocalls in an effort to sell them vehicle service contracts under the guise that they are extensions of original vehicle warranties.[89] The FTC took action against both the promoter of the phony extended auto warranties, as well as the telemarketing company that it hired to carry out its illegal, deceptive campaign. The FTC contends that the companies are operating a massive telemarketing scheme that uses random, pre-recorded phone calls to deceive consumers into thinking that their vehicle's warranty is about to expire. Consumers who respond to the robocalls are pressured to purchase extended service contracts for their vehicles, which the telemarketers falsely portray as an extension of the manufacturer's original warranty. According to papers the FTC filed with the court, however, the robocalls have prompted tens of thousands of complaints from consumers who are either on the United States National Do Not Call Registry or asked not to be called. Five telephone numbers associated with the defendants have generated a total of 30,000 Do Not Call complaints. Consumers received the robocalls at home, work, and on their cell phones, sometimes several times in one day. Businesses, government offices and even 911 dispatchers have been subjected to the calls.

Those who answer the pre-recorded calls hear a message telling them that their vehicle warranty is about to expire and that they should "extend coverage before it is too late". They are told to "press one" to speak to a "warranty specialist". The "specialists" then mislead consumers into believing that their company is affiliated with the dealer or manufacturer of the consumer's vehicle. They try to sell consumers a service contract for between $2,000 and $3,000, which they falsely portray as an extension of the vehicle's original warranty. The seller of extended auto warranties sued by the FTC allegedly took in more than $10 million on the sale of these deceptively marketed service contracts. In their robocalls, the companies dialed every phone number within a particular area code and prefix sequentially, without knowing whether the consumers called were motorists or owned motor vehicles, or whether those consumers' numbers were on the Do Not Call Registry. Consumers who asked that the calls be stopped often were met with "abusive behavior" or were simply hung up on, according to the papers filed with the court. Some of the defendants used offshore shell corporations to try to avoid scrutiny, and a top officer in the telemarketing company bragged to prospective clients that he could operate outside the law without any chance of being caught by the FTC, the papers stated. This defendant also claimed that he makes 1.8 million dials per day and that he had done more than $40 million worth of dialing for extended warranty companies, including one billion dials on behalf of his largest client, according to the court papers filed by the FTC. In addition to the robocalls, the FTC charged that the company selling the warranties mails out deceptive postcards to consumers, warning them about the imminent expiration of their auto warranties. The postcards are designed to mislead consumers into believing that they are being contacted by their dealer or manufacturer, and the postcards offer consumers the chance to "renew" their original warranties.[90] On May 15, 2009 U.S. District Judge John F. Grady issued the temporary restraining order against the defendants Transcontinental Warranty Inc. and Voice Touch Inc. Grady's orders also applied to Transcontinental CEO and President Christopher Cowart, Voice Touch executives James and Maureen Dunne, Voice Touch business partner Network Foundations LLC and Network Foundations executive Damian Kohlfeld. Besides ordering a halt to the automatic telephone sales calls, Grady's order froze the assets of the two companies. The FTC alleged in its complaints that the calls were part of a deceptive scheme and asked the court to assure the assets will not be lost in case they might be needed to repay consumers who have been victimized. The FTC isn't immediately seeking civil fines against the companies but may do so later, agency officials said. Attorneys general in Arkansas, Indiana and Missouri have taken similar actions over calls offering extended warranties on automobiles.[91]

2015

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After receiving more than 215,000 consumer complaints in 2014 alone, the U.S. Federal Communications Commission (FCC) strengthened and clarified its regulations protecting consumers from unwanted robocalls and spam emails and texts. The Commission issued a package of declaratory rulings in June 2015 that clarified the provisions of the Telephone Consumer Protection Act (TCPA) that deal with prerecorded and artificial voice calls received by residential wireline phones as well as wireless numbers.[92][93]

2021

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In 2021 the Federal Communications Commission ("FCC") released an order imposing strict limits on the number of non-telemarketing, prerecorded or artificial voice calls that can be made to residential phone lines without prior consent. The automated landline calls will also be required to include an opt-out mechanism, and callers must implement the FCC's internal do-not-call list rules—which previously applied only to telemarketing calls.[94]

The new order sets a limit of three calls during any consecutive 30-day period for all non-commercial calls, commercial calls that do not contain an advertisement and calls from charities. HIPAA-related residential robocalls are limited to one call per day up to three calls per week. In setting these new limits, the FCC interpreted the TRACED Act to require it to restrict the number of these types of calls to consumers, despite arguments that the TRACED Act’s language was discretionary.[94]

2022

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International incoming robocalls were blocked by the FCC "from entering American phone networks."[95]

2023

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In 2023, it was reported that 48 U.S. states were suing Avid Telecom, an American telecommunications company providing VoIP services in relation to robocalling.[96][97] The company has stated that it will defend itself "vigorously" against the states' allegations.[98]

See also

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References

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Revisions and contributorsEdit on WikipediaRead on Wikipedia
from Grokipedia
A robocall is a initiated through an automated dialing system that delivers a prerecorded or artificial voice message to the recipient, often without prior consent. Primarily regulated by the Telephone Consumer Protection Act (TCPA) of 1991, which prohibits most such calls to wireless numbers unless the called party has provided express prior consent or the call falls under exemptions for emergencies, , or informational purposes, robocalls encompass both legitimate notifications and illicit uses like and scams. Despite these restrictions, robocalls persist as a major consumer issue, with the (FCC) identifying unwanted calls, including illegal and spoofed robocalls, as the top source of consumer complaints. In the United States, robocall volume has surged in recent years, reaching approximately 2.5 billion unwanted calls per month as of 2025, marking a six-year high and an increase from 2.14 billion monthly in 2024. Data from call-tracking services indicate monthly totals exceeding 4 billion calls in several 2025 months, with comprising about 34% and around 28% nationally. These calls frequently involve , where the displayed number is falsified to evade detection, amplifying their deceptive potential and complicating enforcement. The economic toll is substantial, as scam robocalls—often impersonating government agencies, businesses, or tech support—contribute to billions in annual consumer losses, prompting aggressive actions by the (FTC) and FCC, including shutdowns of offending networks and promotion of authentication protocols like . While some robocalls serve practical ends, such as healthcare reminders or school alerts under TCPA allowances, the majority provoke public backlash due to their intrusive nature and association with , leading to innovations in call-blocking technologies and ongoing regulatory refinements. FTC complaint volumes for robocalls, though declining from peaks above 3 million annually, remained at 1.1 million in fiscal year 2024, underscoring persistent challenges from domestic and international perpetrators. Mitigation efforts emphasize consumer tools like the , established in 2003, alongside carrier-level blocking and international cooperation to trace and disrupt gateway providers enabling cross-border call floods.

Definition and Technology

Core Definition and Characteristics

A robocall is a delivered via an automated dialing system that plays a prerecorded or artificially generated voice message to the recipient upon connection. This distinguishes it from manually dialed calls, as the process relies on software to select and initiate calls from a database of phone numbers without human intervention for the initial outreach. Such systems enable rapid dissemination to thousands or millions of recipients, often targeting landlines, mobile phones, or VoIP lines. Core characteristics include the use of autodialers—computerized hardware or software that automatically dials numbers sequentially or predictably—to connect calls, followed by playback of scripted audio content that may urge actions like purchasing products, donating funds, or providing . Messages are typically non-interactive until potentially transferred to a live agent, and they frequently employ caller ID spoofing to mask the originating number, evading basic screening. Robocalls can convey informational content, such as weather alerts or appointment reminders, but many violate regulations when used for unsolicited commercial solicitation without prior consent. The technology leverages predictive dialing algorithms to minimize agent wait times in hybrid systems, though pure robocalls require no human oversight post-deployment. Empirical data underscores their scale: in the United States, billions of robocalls occur annually, with the reporting them as the top consumer complaint category, driven by low operational costs—often fractions of a cent per call—facilitating by scammers and telemarketers alike. Unlike live calls, robocalls exhibit uniform audio delivery, repetitive phrasing, and disconnection upon non-engagement, reflecting their mechanical nature rooted in efficient, bulk communication rather than personalized dialogue.

Technical Mechanisms and Implementation

Robocalls are generated using automated dialing systems, commonly referred to as autodialers, which programmatically initiate calls to lists of telephone numbers without human intervention. These systems employ software algorithms to sequentially or simultaneously dial targets, often processing thousands of numbers per minute depending on available telephony channels and server capacity. Implementation typically involves server-based applications integrated with telephony APIs or hardware interfaces that connect to public switched telephone networks (PSTN) or networks. A core component is the delivery of audio content, which consists of pre-recorded digital audio files triggered upon call connection or, in more advanced setups, dynamically generated via text-to-speech (TTS) synthesis engines. Basic implementations load static or files into the dialing software, playing them automatically when a call is answered, with minimal such as pause-for-keypress prompts in some variants. Voice over Internet Protocol (VoIP) underpins much of modern robocall infrastructure due to its , low per-call costs (often fractions of a cent), and flexibility in routing calls across global networks via (SIP) trunks. VoIP providers or gateways enable operators to lease virtual phone numbers and bandwidth, facilitating high-volume campaigns from remote servers, including those hosted overseas to evade domestic tracing. Caller ID manipulation, or spoofing, is achieved through VoIP's configurable signaling protocols, where the originating system embeds falsified caller identification data in SIP headers before transmission. This allows display of arbitrary numbers, such as local area codes or trusted entities, increasing answer rates by exploiting recipient familiarity. Targeting lists are sourced from data brokers or scraped databases, loaded into the autodialer for sequential processing, with call success logged for follow-up in predictive dialing variants that adjust pace based on historical connect rates. Recent advancements incorporate for real-time voice synthesis or cloning, enabling personalized messages from short audio samples, though traditional pre-recorded formats remain dominant for cost and simplicity in mass deployment. Overall, these mechanisms prioritize volume and evasion over reliability, with open-source tools and services lowering for operators.

Historical Development

Early Origins and Initial Descriptions

The origins of robocalls trace to the early , when advancements in affordable enabled the development of automated dialing systems capable of delivering prerecorded messages en masse. Tony Inocentes, a California-based collector and business owner, is credited with creating the first commercial robocalling system through his company, initially adapting technology from his collection agency for efficient outreach. This innovation allowed for the automated initiation of calls without human intervention, followed by playback of scripted audio messages, marking a shift from manual dialing in telemarketing practices. The inaugural deployment of such technology occurred in January 1983, when Inocentes repurposed his system for political campaigns, launching the first political robocalls to mobilize voters via prerecorded announcements. Early implementations often involved rudimentary setups, such as attaching tape decks to lines for message playback, predating fully digital software integration. These systems targeted residential lines during evening hours, prompting recipients to respond by calling toll-free numbers for further engagement, a tactic common in initial and sales pitches. Initial descriptions of robocalls in contemporaneous accounts portrayed them as efficient tools for high-volume communication, though they quickly drew complaints for intrusiveness, particularly as adoption grew with accessible software by the mid-1980s. Legislative responses emerged soon after, with establishing the first state Do Not Call registry in 1987 to curb unsolicited automated calls, reflecting early recognition of their disruptive potential despite legitimate applications in and notifications. Technical mechanisms at this stage relied on basic auto-dialers connected to analog phones, limiting scale until personal computers proliferated, but they established the core characteristic of nonhuman-initiated, message-driven .

Growth in the Digital Era

The advent of affordable personal computers and autodialing software in the marked the onset of scalable robocalling, enabling businesses and later scammers to automate outbound calls without manual intervention. These early digital systems, often powered by predictive dialers, could generate thousands of calls per hour by sequencing numbers and playing prerecorded messages upon connection, a stark efficiency gain over analog methods. The 1990s and early 2000s saw further acceleration through the integration of internet-based technologies, particularly Voice over Internet Protocol (VoIP), which slashed per-call costs to fractions of a cent and allowed global operations with minimal infrastructure. VoIP's packet-switched nature decoupled calls from traditional telephone networks, enabling high-volume dialing from overseas servers while evading early regulatory oversight. This cost reduction, combined with —facilitated by digital manipulation of signaling data—boosted answer rates and sustained growth despite U.S. Telephone Consumer Protection Act restrictions enacted in 1991. By the mid-2010s, robocall volumes had exploded, driven by these technologies' maturity and the proliferation of mobile phones, which expanded target pools. Annual U.S. robocalls rose from 30.5 billion in 2017 to 47.8 billion in 2018, reflecting a surge attributable to VoIP-enabled networks. This trend persisted into the , with volumes reaching 45.9 billion in 2020—over 50% higher than 2017 levels—despite mitigation efforts, as digital tools like / networks further commoditized mass dialing. The underlying causal factor remains economic: digital infrastructure's low barriers permit persistent scaling by bad actors, outpacing fragmented enforcement.

Emergence of Widespread Abuse

The proliferation of abusive robocalls accelerated in the late 1980s and early 1990s as affordable personal computers and dialing software enabled mass automated calling, initially for aggressive telemarketing but quickly extending to fraudulent schemes such as deceptive "900" number promotions promising prizes or information while charging exorbitant fees. By 1990, consumer complaints about intrusive automated calls had surged sufficiently to prompt the U.S. Congress to enact the Telephone Consumer Protection Act (TCPA) on December 20, 1991, which restricted unsolicited autodialed and prerecorded calls to residences and required prior consent for certain uses, reflecting early recognition of the technology's potential for harassment and deception. However, enforcement challenges and technological workarounds, including caller ID spoofing precursors, allowed scammers to persist, with early robocall frauds often directing victims to toll-free numbers linked to untraceable operations. The establishment of the in 2003 temporarily curbed legitimate robocalls, as compliant businesses reduced volumes to avoid fines, but this inadvertently shifted the landscape toward predominantly illegal operations by offshore fraudsters exploiting (VoIP) for low-cost, high-volume campaigns undetectable by traditional carrier tracing. Abusive calls, now dominated by scams like fake or prize notifications, began evading restrictions through number spoofing and disposable VoIP gateways, with U.S. consumers reporting millions of such incidents annually by the mid-2000s. Widespread abuse crystallized after the Federal Trade Commission's 2009 ban on most prerecorded calls without consent, as illegal robocall volumes exploded—rising from negligible post-registry levels to an estimated 29.1 billion calls in 2016 alone, driven by international networks in countries like and routing calls via U.S. gateways. By 2018, monthly robocalls exceeded 3 billion, with s comprising over 90% of traffic, fueled by the economic incentives of high success rates (even 1% conversion yielding millions in illicit gains) and minimal barriers to entry for perpetrators using . This surge marked the transition from sporadic annoyances to a systemic , with empirical data from carrier reports showing a 57% year-over-year increase from 2017 to 2018, underscoring how regulatory gaps and tech evolution enabled scammers to outpace enforcement.

Legitimate Applications

Political and Advocacy Communications

Robocalls enable political campaigns to deliver automated messages to voters at scale, often for get-out-the-vote () efforts, candidate promotions, and polling reminders. In the United States, these calls to residential landlines are exempt from restrictions under the Telephone Consumer Protection Act (TCPA), permitting outreach without prior consent as long as the calls identify the caller and do not occur before 8 a.m. or after 9 p.m. local time. Autodialed or prerecorded calls to cellular phones, however, generally require prior express consent unless they qualify as non-commercial political content, with the (FCC) enforcing compliance through potential fines up to $1,500 per violation. Campaigns must also transmit accurate information and avoid using blocked or spoofed numbers. Empirical studies on robocall efficacy in political contexts show limited but context-dependent impacts on voter . A large-scale involving partisan robocalls during U.S. found small positive effects on turnout, particularly among low-propensity voters targeted by same-party messengers, though overall increases ranged from 0.5 to 2 percentage points in tested samples. Another analysis of multiple robocall waves indicated with repeated exposure, suggesting optimal dosage around one to two contacts per voter for . Political robocall volume spikes during cycles; for example, Americans received a 158% increase in political calls and texts in compared to prior years, reflecting campaigns' reliance on automated outreach amid shifting voter contact preferences. Advocacy groups leverage robocalls for non-commercial issue , such as mobilizing support for legislative actions or public awareness campaigns, under TCPA exemptions for calls that do not solicit sales or donations. Non-profit organizations must ensure messages remain informational rather than commercial to avoid classification as , which triggers stricter rules and Do Not Call obligations. The FCC's 2024 ruling prohibiting AI-generated voices in robocalls applies to advocacy efforts, aiming to prevent deceptive deepfakes while preserving legitimate automated communications. Guides for advocacy entities emphasize scrubbing lists against Do Not Call registries for any commercial elements and documenting for wireless calls to mitigate enforcement risks.

Debt Collection and Financial Notifications

Robocalls serve as a tool for debt collectors to deliver automated reminders about overdue payments, account status updates, and payment arrangements, primarily to residential landlines under U.S. regulations. The Telephone Consumer Protection Act (TCPA), as amended, permits prerecorded non-telemarketing calls to landlines for debt collection purposes, but imposes strict limits effective July 20, 2023: no more than three such calls within any consecutive 30-day period per debtor. These calls must comply with the Fair Debt Collection Practices Act (FDCPA), prohibiting harassment, false representations, or calls at unreasonable times, such as before 8 a.m. or after 9 p.m. local time. For cellular phones, autodialed or prerecorded debt collection calls generally require prior express consent, with no broad exemption for private debts; a 2015 TCPA amendment allowing such calls solely for government-backed debts was invalidated by the U.S. Supreme Court in 2020 on First Amendment grounds. Federal agencies, such as the Department of Education for student loans, may place robocalls limited to federal debt recovery, excluding any marketing content, per Federal Communications Commission (FCC) rules adopted in 2016 and effective from 2017; these must include opt-out mechanisms and identify the caller. Legitimate debt collection robocalls have contributed to a reported surge in call volumes, with consumer complaints about such contacts rising over 150% year-over-year from 44,999 in Q1 2024 to 112,583 in Q1 2025, reflecting both increased legitimate outreach amid economic pressures and potential overreach prompting scrutiny. This method reduces operational costs for collectors compared to live agents while aiming to improve recovery rates through timely, scripted prompts for payment plans. In financial notifications, banks and credit institutions deploy robocalls for alerts on transaction approvals, low balances, overdrafts, or potential , often as part of established customer relationships where prior is obtained via account agreements. These automated messages, typically prerecorded and directed to landlines or consented cell numbers, provide real-time updates to prevent fees or unauthorized activity; for instance, many institutions integrate them with systems for hybrid alert delivery. TCPA exemptions apply to non-telemarketing calls from entities with whom the recipient has an ongoing business relationship, allowing such notifications without additional if not used for . Emerging AI-enhanced robocalls further automate these alerts, scheduling based on user preferences to enhance efficiency and detection, though they remain subject to requirements and prohibitions on unrelated advertising. Overall, these applications balance consumer notification needs with regulatory safeguards, distinguishing them from prohibited unsolicited commercial robocalls.

Emergency and Public Service Alerts

Robocalls serve as a critical tool for agencies and public organizations to rapidly notify large populations of imminent threats or essential public , bypassing the need for individual opt-in under certain regulations. These automated voice messages are delivered via mass notification systems that target landlines, cell phones, and sometimes VoIP numbers within defined geographic areas, often drawing from 911 databases or resident registries. In the United States, such systems, commonly known as or similar platforms like and CodeRED, enable local authorities to broadcast prerecorded alerts for events including , evacuations, alerts for missing children, and hazardous material incidents. For instance, during natural disasters, these calls provide specific instructions, such as directives or evacuation routes, reaching millions efficiently when other channels like may not cover all devices. The Telephone Consumer Protection Act (TCPA) explicitly exempts robocalls made solely for emergency purposes or to convey information about an emergency posing a to , , or , allowing delivery without prior express consent to avoid delays in life-saving communications. This exemption recognizes the causal necessity of speed in crises, where manual calling would be infeasible for broad dissemination. (FCC) interpretations confirm that government-initiated calls for public , such as wildfire evacuations or flood warnings, qualify, provided they lack commercial content. Effectiveness relies on accurate targeting and message clarity; empirical data from deployments show high delivery rates, with systems capable of processing thousands of calls per minute, though penetration can vary based on call completion rates and public familiarity. alerts extend to non-emergency notifications like utility outages or school closures, enhancing by ensuring timely awareness among demographics less reliant on digital alternatives.

Illegitimate and Abusive Uses

Scam Operations and Fraudulent Schemes

Robocall scams typically employ automated dialing systems to deliver pre-recorded messages that impersonate legitimate entities, aiming to extract payments, personal information, or remote access to victims' devices. These operations often rely on , where scammers falsify the displayed phone number to mimic trusted sources such as government agencies or financial institutions, thereby increasing the likelihood of engagement. Many such calls originate from overseas call centers utilizing (VoIP) technology for low-cost, high-volume dissemination, with initial robocalls serving as broad nets to identify responsive targets for transfer to live fraudsters. Common fraudulent schemes include government impersonation, such as fabricated (IRS) alerts claiming unpaid taxes and threatening immediate arrest or lawsuits unless payment is made via untraceable methods like gift cards or wire transfers; the IRS, however, initiates contact primarily through mail and never demands instant payment over the phone. Tech support scams pose as representatives from companies like , alleging computer viruses or security breaches that require urgent paid remediation, often leading to installation or unauthorized charges. Other prevalent variants encompass auto warranty extensions falsely urging renewal to avoid vehicle impoundment, loan offers promising quick approval in exchange for upfront fees, and pitches exploiting vulnerabilities for bogus policy sales. Scammers' tactics emphasize psychological pressure, invoking scarcity or imminent harm—such as threats in scams or family emergencies in "" variants—to prompt hasty compliance without verification. These schemes frequently culminate in demands for , prepaid debit cards, or bank details, facilitating through mule networks. In the United States, reported losses from phone-based , including robocalls, exceeded $25 billion over the 12 months ending in 2024, affecting over 56 million individuals, with median per-victim losses varying by scheme type but often surpassing $500. Enforcement data from the (FTC) and (FCC) highlight loans, , and IRS-related complaints as comprising the majority of robocall scam reports in 2024.

Specific Persistent Scams

Government impersonation scams, particularly those mimicking the (IRS), remain among the most enduring robocall frauds, with scammers using pre-recorded messages to threaten victims with immediate arrest, deportation, or license revocation unless fictitious debts are paid promptly via untraceable methods such as gift cards or wire transfers. These operations spoof caller IDs to appear legitimate and often escalate urgency by referencing non-existent agencies like the "Bureau of ," exploiting fears of legal consequences despite the IRS's policy of initial contact via rather than unsolicited calls. Persistence stems from low enforcement barriers for overseas perpetrators and the high yield from targeting vulnerable demographics, with reports indicating year-round activity peaking in late spring. Social Security Administration (SSA) impersonation follows a similar pattern, where robocalls falsely claim suspension of benefits, criminal activity tied to the victim's Social Security number, or impending law enforcement action, urging callbacks to fake numbers for "resolution." Tactics include posing as SSA officials or affiliates like the Office of the Inspector General, often combined with demands for personal information or payments to avert supposed penalties, though the SSA never initiates contact via unsolicited calls threatening adverse actions. These scams endure due to their exploitation of retirees' reliance on benefits and spoofing capabilities that evade basic filters, with alerts issued as recently as July 2025 highlighting ongoing variants involving fabricated Department of Justice ties. Tech support scams, frequently masquerading as representatives from companies like Apple or , use robocalls to allege computer viruses, account hacks, or security breaches requiring immediate remote access or payment for bogus fixes. Scammers employ pop-up warnings or urgent voicemails to prompt callbacks, then gain device control to extract credentials, install , or charge for unnecessary services, often spoofing trusted caller IDs to build false credibility. Their longevity arises from the technical intimidation factor deterring verification and the profitability of data theft, with FTC updates in 2024 extending rules to curb inbound scam calls triggered by these tactics. Extended auto warranty scams persist through robocalls warning of expiring vehicle coverage and pressuring for on-the-spot renewals via high-pressure sales pitches or fabricated final-notice claims. These schemes target vehicle owners indiscriminately, using automated dialing to maximize reach while ignoring do-not-call lists, and demand payments that yield little to no actual coverage, contributing to broader losses averaging $3,690 per robocall victim in the first half of 2025. Official guidance emphasizes hanging up without engaging, as legitimate warranties do not solicit via unsolicited calls.

Scale and Empirical Impacts

In 2025, U.S. consumers received an average of 2.56 billion robocalls per month from through , representing a 6-year high and a 20% increase from the 2.14 billion monthly average in 2024. This volume equates to approximately 85 million robocalls daily, or over 980 per second, with the first seven months totaling 32.5 billion calls—a 9.2% rise over the prior year's equivalent period. Such scale reflects persistent challenges from spoofed numbers and foreign gateways, despite regulatory efforts, as tracked by industry monitors like YouMail's Robocall Index. Financial losses from robocall-initiated scams impose substantial empirical costs. Federal Trade Commission data indicate that fraud losses from traditional contact methods, including phone calls, totaled about $1.9 billion in 2024, amid overall consumer fraud reports exceeding $12.5 billion—a 25% year-over-year jump. Phone-started scam losses specifically increased 16% in the first half of 2025 compared to 2024, driven by tactics like impersonation and urgent payment demands. Globally, robocalling fraud is projected to exceed $80 billion in consumer losses for 2025, with the U.S. comprising a major share due to high call volumes and vulnerability among older demographics. Beyond direct monetary harm, robocalls empirically disrupt consumer behavior and trust in . A analysis revealed that 72% of U.S. consumers have missed legitimate calls due to fears of robocalls, spoofing, or , leading to delayed responses to like healthcare or banking notifications. This avoidance correlates with heightened complaint volumes to agencies like the FCC, which logged millions of reports annually, exacerbating inefficiencies in legitimate outreach and contributing to broader societal costs from unaddressed emergencies or collections.

Regulatory Responses

United States Federal Framework

The Telephone Consumer Protection Act (TCPA), enacted in 1991, forms the cornerstone of federal regulation against abusive robocalls in the , prohibiting most non-emergency autodialed or prerecorded calls to wireless telephone numbers without the called party's prior express . The TCPA also restricts prerecorded calls to residential landlines and imposes requirements for obtaining , such as clear disclosure of the caller's identity and purpose, while authorizing private lawsuits and FCC enforcement with civil penalties up to $1,500 per violation for willful infractions. These provisions targeted the proliferation of automated dialing systems that overwhelmed consumers, but enforcement challenges persisted due to the Act's one-year and reliance on self-reported violations. Complementing the TCPA, the Federal Trade Commission's Telemarketing Sales Rule (TSR), amended in 2003, established the , allowing consumers to register their numbers to block most calls, including many robocalls, with fines up to $50,120 per violation for calls to registered numbers absent an established business relationship or prior consent. The Registry has enrolled over 240 million numbers as of 2024, reducing legitimate volume but proving less effective against illegal robocalls, which often originate from spoofed or foreign numbers bypassing domestic compliance. FTC data indicate persistent violations, with millions of complaints annually, underscoring the limitations of mechanisms against bad-faith actors unconcerned with penalties. The Pallone-Thune Telephone Robocall Abuse Criminal Enforcement and Deterrence (TRACED) Act, signed into law on December 30, 2019, strengthened the framework by extending the TCPA's for FCC enforcement actions to six years for knowing violations, mandating voice service providers to implement caller ID authentication protocols like by June 30, 2021, and requiring traceback consortia for identifying robocall origins within 24 hours of FCC requests. The Act also empowers the FCC to designate gateway providers handling large inbound international traffic as responsible for blocking suspected illegal calls and establishes interagency coordination through the Robocall Response Team, which has pursued actions against over 100 providers since 2020. Implementation has included FCC rules clarifying one-to-one consent revocation via reply texts or calls, effective January 2024, to address ambiguities exploited by marketers. The administers TCPA implementation and has issued rules prohibiting all robocalls using autodialers or prerecorded messages to emergency lines or patient care facilities, with exemptions for government alerts and certain nonprofit calls. Recent FCC orders, such as those in 2024, have expanded prohibitions on AI-generated voices in robocalls absent consent, citing risks of deception in scams mimicking officials, while mandating carrier-level blocking of unauthenticated traffic post-STIR/SHAKEN deadlines. Enforcement has resulted in billions in proposed forfeitures, though recovery rates remain low due to offshore perpetrators, highlighting the framework's emphasis on prevention over post-hoc penalties.

State-Specific Regulations in the US

In addition to the federal Telephone Consumer Protection Act (TCPA), U.S. states have implemented varied regulations on robocalls, often exceeding federal baselines by imposing call frequency limits, device-specific bans, enhanced disclosure requirements, or separate do-not-call registries. These laws typically apply to prerecorded or automated calls for , , or political purposes, with enforcement handled by state attorneys general (AGs) through civil penalties that can reach thousands of dollars per violation. For example, states like mandate that telemarketing calls occur only between 8:00 a.m. and 8:00 p.m. local time, excluding Sundays and holidays, with fines up to $2,000 per infraction. Similarly, , , and restrict telemarketing calls to a maximum of three per consumer within any 24-hour period on the same subject matter or issue, aiming to curb persistent . Several states prohibit or severely limit robocalls to wireless devices, recognizing the intrusive nature of such calls on personal mobiles. , , , , , , and explicitly bar unsolicited prerecorded calls to cell phones absent prior consent, aligning with but extending TCPA provisions. Other states, such as and , criminalize —falsely displaying misleading origins—to combat scams originating domestically or abroad. At least 26 states maintain their own do-not-call lists, which supplement the national registry and require callers to scrub against both, with non-compliance leading to injunctions or damages. State AGs have intensified enforcement via multi-jurisdictional efforts, including the bipartisan launched in 2022 by 51 AGs to pursue scammers and hold telecom providers accountable for failing to mitigate illegal traffic. In August 2025, AGs from all 50 states initiated "Operation Robocall Roundup," issuing cease-and-desist warnings to 37 voice service providers for ignoring (FCC) traceback requests and enabling foreign-originated spam, with threats of litigation under state unfair trade practices laws. States like and have secured multimillion-dollar settlements against robocall operators, demonstrating aggressive use of statutory authority to recover funds for consumers and deter violations.
StateKey Robocall RestrictionEnforcement MechanismCitation
Max 3 calls/24 hours; bans to mobiles without consentAG civil suits, up to $10,000/violation
Max 3 calls/24 hours; aggressive scam targetingSettlements exceeding $10M
Bans to mobiles; spoofing penaltiesState DNC list, private right of action
These state-level measures address gaps in federal enforcement, particularly against domestic facilitators of illegal calls, though challenges persist due to jurisdictional overlaps and the need for interstate coordination.

Canadian Regulations

In , the Canadian Radio-television and Telecommunications Commission (CRTC) regulates robocalls—defined as calls using automatic dialing-announcing devices (ADAD) that deliver prerecorded messages—primarily through the Unsolicited Telecommunications Rules (UTR), which apply to telemarketers, organizations, and individuals initiating such communications. The National Do Not Call List (DNCL), operational since September 30, 2008, allows consumers to register residential, wireless, fax, or VoIP numbers for five-year periods to of telemarketing calls, including robocalls, at no cost. Telemarketers must register with the DNCL operator free of charge, subscribe to relevant area code lists (paying fees based on subscription scope, such as $1,448 for up to 50 area codes annually as of recent filings), and refrain from calling registered numbers unless an exemption applies; lists must be downloaded within 31 days of initiating calls. Robocalls using ADAD require prior express from the called party, which must be documented and specific to the number involved; this applies even to prerecorded informational messages and lacks exemptions for charities or non-profits. Telemarketers must also maintain internal do-not-call lists for consumers who request no further contact, adding within 14 days and retaining them for at least three years and 14 days. Calls are restricted to between 9:00 a.m. and 9:30 p.m. local time on weekdays and 10:00 a.m. to 6:00 p.m. on weekends and holidays, with immediate identification of the caller, , and a valid contact number required at the start of each call. Exemptions from DNCL restrictions include calls related to existing business relationships (within two years of a purchase or six months of an inquiry), explicit referrals, charitable solicitations (though ADAD consent is still needed), political communications by registered parties or candidates, market surveys, , and purposes; political robocalls, for instance, bypass DNCL but must honor internal lists and other UTR provisions. The CRTC enforces compliance via investigations prompted by consumer complaints filed online or by phone, imposing administrative monetary penalties (AMPs) up to $1,500 per violation for individuals and $15,000 for corporations or businesses. To date, penalties have exceeded $8 million across cases, including a $211,000 AMP in for 211 DNCL violations at $1,000 each and prior fines for unauthorized robocalls by political entities. In February 2024, the CRTC initiated consultations (Notice of Consultation 2024-43) to mandate traceback participation for all voice telecommunications service providers, aiming to trace the origins of unsolicited and potentially illegal robocalls more effectively, building on voluntary industry efforts; comments were due by March 29, 2024. The CRTC also collaborates internationally, including through a 2022 with the U.S. to combat cross-border robocalls.

International Dimensions and Foreign-Origin Challenges

A substantial portion of illegal robocalls targeting the originate overseas, with data indicating that up to 65% of such calls traced in 2021 were foreign-sourced, primarily entering via U.S.-based gateway providers that intermediate international traffic. These providers receive calls directly from foreign carriers and route them into domestic networks, often without initial scrutiny of the content or origin. Foreign-origin challenges stem from , where scammers mask international numbers as domestic ones within the (NANP), enabling evasion of basic blocking and traceback. Jurisdictional barriers further hinder enforcement, as U.S. regulators lack direct authority over foreign operators, leading to reliance on voluntary compliance or diplomatic pressure, which proves inconsistent across nations with varying laws and enforcement priorities. Gateway providers, positioned as the "front lines" for inbound traffic, face heightened responsibilities but encounter difficulties verifying upstream foreign entities, exacerbating the issue. In May 2022, the FCC adopted targeted rules requiring gateway providers to authenticate calls using protocols, validate the identities of foreign upstream providers, block notified illegal traffic, and fully participate in industry traceback consortia. Non-compliance can result in removal from the FCC's Robocall Mitigation Database, prompting mandatory network blocking by downstream carriers, as demonstrated by the FCC's August 2025 action barring over 1,200 providers. These measures aim to disrupt the pipeline for foreign robocalls while incentivizing better foreign-side mitigation. International cooperation has expanded through FCC-signed memoranda of understanding (MOUs) with counterparts in (2023), , , , , the , and the , focusing on shared intelligence, authentication standards, and coordinated enforcement against cross-border spoofing and scams. The FCC's C-CIST designations further classify persistent foreign threat actors to prioritize disruptions. Legislative momentum includes the 2025 Foreign Robocall Elimination Act, advanced by the Commerce Committee in October, which mandates an FCC-led to strategize reductions in overseas calls, evaluate foreign caller ID technologies, identify primary source countries, and explore collaborative incentives. Persistent hurdles include incomplete global adoption and the adaptability of scammers using voice-over-IP (VoIP) to reroute through compliant gateways, underscoring the need for reciprocal foreign regulations to achieve meaningful volume reductions.

Mitigation Strategies

Blocking and Filtering Technologies

Blocking and filtering technologies for robocalls include carrier-implemented network-level systems, third-party mobile applications, and built-in device features that detect and intercept unwanted calls using databases of known spam numbers, behavioral analytics, and algorithms. These tools aim to reduce the volume of illegal or nuisance calls by either silently dropping them, routing them to , or labeling them as potential spam before the consumer's device rings. The (FCC) has authorized voice service providers to offer such blocking services since 2017, enabling proactive filtering based on reasonable analytics without liability for unintended blocks of legitimate calls. Carrier-level solutions operate upstream in the network, analyzing call patterns such as high-volume origins or mismatched data to block traffic before it reaches end-users. For instance, Verizon's Call Filter service provides real-time spam alerts and automatic robocall blocking, with options to report false positives. T-Mobile's Scam Shield app employs network intelligence to shield against scam calls and robocalls, integrating with device notifications for user control. AT&T's ActiveArmor uses STIR/SHAKEN authentication and AI to label or block suspicious calls automatically. U.S. Cellular's CallGuardian uses advanced detection to halt spam, unwanted, and illegal calls at the carrier stage. These services have contributed to measurable reductions in robocall volumes for subscribers, though effectiveness depends on ongoing database updates and cooperation among providers to trace cross-network traffic. Third-party applications extend filtering capabilities through crowdsourced databases and proprietary detection methods. Nomorobo employs a "simultaneous ringing" technique, routing incoming calls to a secondary line for rapid robocall identification and hang-up, primarily for landlines and VoIP but adaptable to mobile via carrier partnerships. RoboKiller integrates audio fingerprinting, , and answer-bot countermeasures, claiming a 99% block rate against detected robocalls, though such figures derive from internal testing. Hiya offers spam detection with area code blocking and reporting, updating its database daily via user contributions and network data. Apps like Truecaller provide similar crowdsourced blocking and identification. Apps like these, available for and Android, filter calls at the device level but may require permissions that raise concerns, as some share user data for improved accuracy. Device-native features provide baseline protection without additional software. Apple's includes "Silence Unknown Callers," which mutes rings from non-contacts, and as of iOS 18 in 2024, enhanced call screening tools akin to Android's longstanding spam risk labeling. Android devices leverage Protect, spam filtering, and features like Call Screen (especially on Pixel phones with AI enhancements) for global blocking and spam identification. While these technologies collectively block billions of robocalls annually— with FCC reports indicating widespread adoption—limitations persist, including evasion via and potential over-blocking of legitimate calls, necessitating user overrides and regulatory oversight for balanced implementation. Additional strategies include registering numbers on the National Do Not Call Registry to reduce legitimate telemarketing calls (though ineffective against illegal robocalls), avoiding answering unknown numbers to prevent confirming active lines, and reporting calls to aid enforcement.

Authentication Protocols like STIR/SHAKEN

is a authentication framework developed to verify the legitimacy of numbers and reduce spoofing in voice calls, primarily targeting illegal robocalls originating from IP-based . The protocol combines STIR (Secure Telephone Identity Revisited), which defines the format for digitally signing caller information using , with SHAKEN (Signature-based Handling of Asserted information using toKENs), which standardizes how handle and attest to that signed data. Voice service providers digitally sign calls with one of three attestation levels: "A" for full verification of the originating number, "B" for partial knowledge of the caller's identity, or "C" for gateway-level attestation without subscriber details. Receiving can then validate these signatures to assess trustworthiness, enabling them to flag or block unauthenticated calls, as integrated into carrier blocking services. The U.S. (FCC) mandated implementation for all originating and terminating voice providers in IP networks via rules adopted on February 6, 2020, with compliance required by June 30, 2021, for larger providers and extensions granted to smaller ones until June 30, 2023. Subsequent enforcement actions, including the FCC's Eighth Report and Order on November 21, 2024, expanded obligations to resellers and third-party traffic aggregators, requiring them to authenticate calls routed through non-IP gateways starting in 2025. By the first half of 2025, Tier-1 carriers achieved signed and verified traffic rates exceeding 84% for inter-carrier calls, reflecting strong adoption among major U.S. telecoms that have migrated to SIP-based systems. However, smaller and non-IP reliant providers lag, with overall unsigned call volumes persisting at around 38% in mid-2025, partly due to legacy TDM network dependencies. Empirical data indicates partial success in curbing domestic spoofing, with studies showing reductions in U.S. robocall volumes attributable to authenticated traffic blocking, yet total spam calls reached a six-year high in 2025, up 20% year-over-year. Fraudsters have adapted by exploiting unsigned international traffic, which bypasses U.S. attestation entirely, and by obtaining low-level "B" or "C" attestations through gateway providers in jurisdictions without reciprocal standards. Key limitations include ineffectiveness against (ANI) spoofing, where attackers manipulate signaling separate from caller ID, and non-applicability to traditional (TDM) or foreign-originated calls comprising over half of U.S. robocall traffic. Invalid or "failed" attestations, often from misconfigured systems, further undermine reliability without halting determined scammers who route via unsigned paths. While enhances traceability for enforcement, its IP-centric design and lack of global interoperability limit broader impact, prompting calls for supplementary measures like in-band for non-IP gaps.

Enforcement Mechanisms and Recent Actions

The serves as the primary federal enforcer against illegal robocalls under the Telephone Consumer Protection Act (TCPA) and the Telemarketing Sales Rule, imposing civil penalties of up to $500 per violation or $1,500 for willful violations, alongside cease-and-desist orders and injunctions. The FCC's Robocall Response Team coordinates investigations, leveraging consumer complaints filed via its portal, tracebacks from voice service providers, and analytics to identify traffic sources, often resulting in provider disconnection mandates if mitigation efforts fail. The complements this by enforcing the , pursuing settlements and fines for deceptive practices, while the Department of Justice (DOJ) handles criminal prosecutions under the TRACED Act for intentional fraudulent schemes, enabling penalties including imprisonment for repeat offenders. Enforcement increasingly targets gateway providers and international origins through the Robocall Mitigation Database, where all U.S. voice providers must certify programs to block illegal traffic or risk removal, facilitating network-level blocking by downstream carriers. State attorneys general also intervene, issuing warnings or lawsuits under parallel laws, as seen in coordinated operations routing illegal calls. In August 2025, the FCC executed a major sweep under Operation First Responder, removing over 1,200 non-compliant voice providers—roughly half of those warned in late 2024—from the Robocall Mitigation Database for inaccurate certifications or failure to block illegal campaigns, effectively barring them from U.S. networks and disrupting operations. Earlier in 2025, the FCC shut down approximately 1,400 violators amid a 20% rise in spam robocalls, including actions against providers enabling AI-generated voices without consent. Notable fines include a $1 million penalty against Lingo Telecom in 2025 for authenticating AI robocalls mimicking President Biden's voice during the primary, violating TCPA restrictions on artificial voices. The FTC secured a $145 million settlement in August 2025 with Assurance IQ and MediaAlpha for deploying millions of unsolicited robocalls misleading consumers on quotes, without prior consent. In October 2025, the FTC and DOJ settled with a disability-advocacy firm for routing millions of unauthorized robocalls via third parties, highlighting interagency efforts against domestic facilitators. These actions underscore a shift toward proactive provider , though challenges persist with foreign gateways evading full .

Controversies and Broader Implications

First Amendment and Free Speech Debates

The Telephone Consumer Protection Act (TCPA) of 1991 imposes restrictions on autodialed or prerecorded calls to cellular telephones without prior consent, prompting ongoing First Amendment challenges asserting that such bans infringe on protected speech rights. Courts have generally upheld the TCPA's core provisions as content-neutral time, place, and manner restrictions that advance substantial government interests in consumer and reducing intrusive communications, rather than suppressing ideas. For instance, the U.S. in Barr v. American Association of Political Consultants, Inc. (2020) affirmed the constitutionality of the TCPA's blanket prohibition on robocalls to cell phones, severing only a 2015 exemption for government-backed as content-based that favored certain speech over others, including political . The Court reasoned that the restriction applies equally to all speakers and subjects, justifying it by the "blight of unwanted " and the captive nature of cell phone users who carry devices constantly. Proponents of stricter scrutiny argue that the TCPA unduly burdens core political speech, which demands heightened protection under , as robocalls enable cost-effective dissemination of electoral messages to broad audiences. Legal scholars have contended that the ban fails this test by not employing narrower alternatives, such as caller ID requirements or time-of-day limits, especially since cell phones have supplanted landlines as primary communication tools since the 1990s, rendering outdated assumptions about residential . Political consultants and nonprofits, including those challenging the in Barr, asserted that the debt-collection carve-out exemplified viewpoint discrimination, privileging governmental interests over democratic discourse, though the rejected invalidating the entire statute to avoid overbroad relief. Empirical evidence of robocalls' role in campaigns—such as over 1 billion political calls in the 2016 U.S. election cycle—fuels claims that prohibitions chill organizing, yet courts counter that mechanisms and exemptions for live calls preserve ample alternative channels. State-level robocall bans have faced greater First Amendment hurdles when deemed underinclusive or speaker-based. The Ninth Circuit in 2019 invalidated Montana's prohibition on certain robocalls while permitting informational or political ones, ruling it content-based and failing for commercial speech. Similarly, the Fourth Circuit struck down parts of North Carolina's for exempting media and government calls, highlighting how selective restrictions invite stricter review. These rulings underscore a tension: while federal uniformity under the TCPA withstands challenges by treating all robocalls alike, fragmented state approaches risk favoring established voices, prompting debates over whether privacy protections justify forgoing robust empirical tailoring, such as data-driven opt-in registries that minimize speech suppression. Critics from free speech advocacy groups maintain that pervasive scam calls—totaling 58.3 billion in the U.S. in 2020—do not negate the need for precise regulation to avoid collateral censorship of legitimate expression.

Effectiveness of Regulations and Unintended Consequences

Despite the Telephone Consumer Protection Act (TCPA) of 1991, which prohibits unsolicited autodialed or prerecorded calls to wireless numbers without consent, and the launched in 2003, robocall volumes in the United States have escalated rather than declined. U.S. consumers received over 4.8 billion robocalls in May 2025, averaging 165 million per day. Spam robocalls hit a six-year high in 2025, rising 20% from the prior year, with an 11% increase in the first five months compared to 2024. The Do Not Call Registry has limited impact on illegal robocalls, as it relies on voluntary compliance from legitimate telemarketers while scammers, often operating from abroad, ignore it entirely. The caller authentication protocol, mandated by the (FCC) for large carriers in 2019 and smaller ones by mid-2023, sought to combat spoofing by digitally signing calls but has yielded mixed results. Academic analysis shows some reduction in U.S. robocalls post-implementation, yet spammers have adapted by exploiting unsigned calls and non-IP networks of smaller providers, rendering overall detection only 16.3% effective via tools like the Robocall Observatory. Fraudulent robocall activity exploded after 's rollout, as bad actors shifted tactics to evade verification, including through vulnerable international gateways. Unintended consequences of these regulations include heightened burdens on compliant entities and adaptation by illicit operators. TCPA enforcement has fueled a surge in private lawsuits against businesses for perceived violations, with penalties up to $1,500 per willful call, often targeting inadvertent dials in legitimate contexts like customer notifications, potentially chilling useful automated outreach. compliance imposes significant technical and financial costs on carriers, particularly smaller ones reliant on legacy non-IP systems, enabling scammers to migrate to those networks and exacerbating disparities in enforcement. State-level expansions, such as proposed bans on certain calls, risk overreach by inadvertently restricting employer communications, like shift scheduling, without curbing volumes dominated by foreign sources. Overall, domestic-focused rules have displaced rather than eliminated threats, pushing toward emerging vectors like AI-generated voices and robotexts, with over 24,000 unwanted text complaints to the FCC in 2024 alone.

Economic Costs and Societal Trade-offs

Robocalls impose substantial economic burdens on consumers, primarily through direct financial losses from and indirect costs from time wasted fielding unwanted calls. In 2023, U.S. consumers reported $851 million in losses to robocall-initiated , nearly double the $423 million recorded in 2020. Globally, fraudulent robocalling is projected to cause over $76 billion in subscriber losses in the coming year, driven by high-volume exploiting . For the first quarter of 2025 alone, the estimated $280 million in losses from phone-based , with average victim losses reaching $3,690 per robocall incident. These figures exclude unreported cases, suggesting underestimation of the true scale. Businesses face parallel productivity disruptions, as robocalls interrupt workflows and erode employee focus. Small businesses, handling dozens of robocalls daily, incur annual productivity losses estimated at $118,000 from time diverted to screening calls. Larger enterprises experience amplified effects, with interruptions compounding into significant operational inefficiencies and potential revenue shortfalls from missed legitimate customer interactions. The estimates consumer time costs alone at over $3 billion annually, a metric that extends to commercial settings where spam calls mimic legitimate outreach, fostering distrust and complicating sales efforts. Mitigation efforts, such as deploying authentication protocols, add further economic strain on providers, with per-carrier implementation costs ranging from $15,000 to $300,000, scaling to industry-wide billions when factoring in network upgrades and compliance. These expenses, mandated by FCC rules effective June 2023 for gateway providers, are often passed to consumers via higher service fees, creating a feedback loop where anti-robocall measures indirectly burden the they aim to protect. Societally, robocalls embody a trade-off between the utility of legitimate automated communications and the harms of illicit ones. Legitimate robocalls enable efficient mass notifications, such as school closure alerts, medical appointment reminders, emergency broadcasts, and political campaigning, which enhance public safety and at low . However, pervasive illegal robocalls—often scams or unsolicited —erode trust in all automated calls, prompting aggressive blocking that risks suppressing beneficial ones, as consumers and algorithms increasingly ignore or filter potentially vital messages. Regulations like the Telephone Consumer Protection Act curb abuses but impose compliance hurdles that disadvantage small entities reliant on automated outreach, while imperfect enforcement allows foreign-origin scams to persist, yielding diminishing returns against evolving evasion tactics. This tension underscores a causal : unchecked proliferation harms societal cohesion through widespread annoyance and vulnerability, yet overzealous countermeasures may stifle efficient information dissemination without fully eradicating the problem.

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