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.
The card security code (CSC) is sometimes called Card Verification Data (CVD), Card Verification Value (CVV or CVV2), Card Verification Value Code (CVVC), Card Verification Code (CVC or CVC2), Verification Code (V-Code or V Code), or Card Code Verification (CCV).
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 has a 4-digit security code located on the front-right corner of the card.
NOTE: We are not allowed to save a CVV2 code in our billing database. This is why some credit cards CANNOT be automatically charged.
If you have enough funds, but your auto-payment fails, it is likely because your card company requires the CVV2 for every transaction. The only solution is to use a different card, or pay manually each time.