The security code is an important new security feature that now appears on the front of American Express Cards and the back of most other cards. The security code helps validate that the customer placing the online order actually has the credit card in his/her possession, and that the credit/debit card account is legitimate.

In the signature box on the back of the card, you should see either the entire 16-digit credit card number or just the last four digits followed by a 3-digit code. This 3-digit code is your Card Security Code.

Just above and to the right of the embossed credit card number is a 4-digit code. This 4-digit code is your Card Security Code.

Just above and to the left of the embossed credit card number is a 4-digit code. This 4-digit code is your Card Security Code.