Cash4Gold was a company which purchased gold, silver, and platinum, primarily from jewelry mailed in by customers. In 2012, the company declared insolvency and its assets were purchased by Direct Holdings Global.

Consumers requested a pre-paid envelope known as a "Refiner's Pack", which was used to ship their gold materials or precious metals to the Cash4Gold refinery in Florida. A Cash4Gold employee weighed, photographed, and assessed the items using tools such as acids, X-rays, and electronic testing devices. The company would then make the customer a financial offer for the submitted items and remit a check for their value; the customer would have 10 days from that point to accept or decline the offer.

Multiple complaints were raised about the fairness of this process and the valuations of the gold mailed by customers to the company.

Cash4Gold also purchased diamonds, but did not pay for additional gem stones and recommended they be removed from jewelry prior to sending it for evaluation.^{[citation needed]}

To ensure customers are the legal owners of the jewelry that is sent in, Florida passed legislation aimed at regulating the online gold-buying industry. Cash4Gold worked with Florida legislators to draft the bill. This new law also requires the company to get a driver's license number and a sworn statement from customers stating that they own the items they are selling. Sellers must be at least 21 years old and the senders’ addresses are verified.

CNN visited Cash4Gold headquarters in March 2010 to see the company's methods of collecting, processing and melting gold jewelry. In the visit, steps shown included customer background checks, a separation of the jewelry, then processing the items for evaluations before sending customers their checks and melting items into gold bars. In a follow-up article written in 2012, Fortune described some of the business practices that led to the company's bankruptcy that same year.

Green Bullion Financial Services LLC was formed in April 2007 and traded under the principle name of Cash4Gold, eventually being located in Pompano Beach, Florida, and being derived from Albar Precious Metal Refining, created by former CEO Jeff Aronson.

In late 2008 venture capital firms Highland Capital Partners and General Catalyst invested $40 million into Green Bullion though both would exit their deals by late 2010. Highland Capital Partners would later be sued by Marlboro Investment Group for fraud and various breaches related to the company. Highland principal Gaurav Tewari, who was alleged to have been a former acting chief operating officer for Cash4Gold, was also named as a defendant.