What is CVV2? CVV2 is a new authentication scheme established by credit card companies to further efforts towards reducing fraud for internet transactions. It consists of requiring a card holder to enter the CVV2 number in at transaction time to verify that the card is on hand.   Visa & MasterCard: This number is printed on your MasterCard & Visa cards in the signature area of the back of the card. (it is the last 3 digits AFTER the credit card number in the signature area of the card). American Express: American Express cards show the CVV2 (also referred to as the CID number) printed above the imprinted card number on the front of the card**. ** Please note, there are a small percentage of "plastic-less" card accounts for American Express - Corporate and Purchasing Card accounts. If you have one of these accounts with no AMEX card, please enter 5555 as your CVV2 number. ***If your European or Asian credit card does not have a CVV2 number, you may enter 000 as your CVV2 number.