Counterfeit cards are fake, manufactured cards. Criminals createthese cards by using a skimmer to obtain all of your cards information. Once a criminal copies all of your card data, they create their own card with your information. However, on the altered card, the name, expiration date, account number and/or magnetic strip have been changed in some way. To prevent your card from being counterfeited, remember to always check every card scanner you swipe simply checking if the scanner is easily removed from the machine.