Visa™/MasterCard™ Users For MasterCard, Visa and Discover, the Card Validation Code is a 3-digit code that is usually printed on the signature panel on the back of your credit card. It is usually found to the right of the card number.
American Express™ Users For American Express, the Card Validation Code is a 4-digit code that is usually found in raised letters on the front of the card to the top right of your account number.
