About Credit Card Security Codes
Visa, MasterCard & Discover | |
It is the last three digits that appear after your 16-digit credit card number in the signature panel on the back of your card. In this example it is 895. | |
American Express | |
It is the four digit number that appears on the right side above your imprinted 15-digit credit card number on the front of your card. In this example it is 9343. |