CVV stands for Card Verification Value. Usually, CVV is a three-digit number (Visa and MasterCard), but, in some cases like American Express uses four digits. The number is found at the back of the ...
It doesn't matter what you call them -- a card security code (CSC), card verification value (CVV or CV2), card verification code (CVC) or even a card code verification (CCV) -- those three or four ...