Key takeaways. Credit card security codes are three-digit codes on the back of your card (four-digits on the front if you have an American Express card) used to verify that have the physical card.

Many major credit card issuers place credit card security code numbers on the back of your credit card. It’s usually a three-digit number, but American express uses four digits.

She says to also see if the three-digit security code has been scratched off, ... Keep a copy of the American Express gift card or your store receipt.

How to find your Card Security Code on an American Express Card The Card Security Code is the 4 digit number located above the account number on the face of the card, sometimes on the left side and ...