On a Visa or MasterCard, the CVC is a three-digit number located on the back of the card, usually in the signature stripe or to the right of it. On some cards, the CVC number will be printed on the back of the card after a full reprinting of the credit card number, or the last four digits of the credit card number. On an American Express card, the CVC (called the CID on American Express) is a four-digit code located on the front of the card, usually printed (and not embossed) to the right of the credit card number. Please note the CVC number is a different number than your standard credit card number.