Where is the CVV, CVC, or CID credit card security code located on my credit card?

This is a separate 3 or 4 digit number on the card back or front depending on card type. For Visa, MasterCard, JCB, and Discover, the card security code (CVV, CVC, CID) is the last 3 digit number located on the back of your card on or above your signature line. For American Express and Diners Club, it is the 4 digits on the FRONT above the end of your card number. Your billing name and address must also match for the card.