Before the introduction of the euro, the current eurozone members issued their own individual national coinage, most of which featured mint marks, privy marks and/or mint master marks. These marks have been continued as a part of the national designs of the euro coins, as well. This article serves to list the information about the various types of identifying marks on euro coins, including engraver and designer initials and the unique edge inscriptions found on the €2 coins.

Since the euro was officially introduced in 1999, most of the EMU member countries began producing their coins ahead of the 2002 introduction date. There is individual national legislation in place which governs the mintage of coins issued from each country. These coinage acts regulate the coin production parameters for each country.

The coinage acts of countries with a mintage date stipulation specify that the year the coin is minted, regardless of when the coins are issued, should appear on each coin. Belgium, Finland, France, the Netherlands and Spain have mintage date stipulations.

The coinage acts of countries with an issue date stipulation specify that the year the coin is issued, regardless of when the coins are minted, should appear on each coin. Austria, Germany, Greece, Ireland, Italy, Luxembourg, Portugal, San Marino and the Vatican City have issue date stipulations.

Since the euro was first issued in 2002, the countries which have an issue date stipulation are all dated 2002 onward, even though these coins were minted in previous years to prepare for the adoption of the euro. As a result, there are no euro coins dated 1999, 2000 and 2001 issued from countries with an issue date stipulation.

Luxembourg has no domestic mint, so their coins are minted elsewhere. Regardless of the mintage location of these coins, the issue date stipulation in their coinage act must be followed by whichever country mints their coins and the date stamp is therefore applied accordingly.

Since Monaco, San Marino and the Vatican City do not have their own coinage acts, the date stamp is applied in accordance with the coinage act of whichever country mints these coins. France produces the euro coins for Monaco and follows the mintage date stipulation; it began minting Monégasque euro coins only in 2001, since the mintage quantities were so low. Sammarinese and Vatican euro coins are minted in Italy and follow the issue date stipulation.

As per a recommendation defined by the Economic and Financial Affairs Council of the European Union, the national designs of each member's euro coin should contain a national identification in the form of spelling or abbreviation of the country's name. Of the fifteen members of the Eurozone at the time these recommendations were made, five national designs—those of Austria, Belgium, Finland, Germany and Greece—did not meet the criteria outlined. Of these five, two (Finland in 2007 and Belgium in 2008) have changed or amended their design to follow these recommendations, and the other three are expected to follow suit in the coming years.