MasterCard, Visa & Discover -
3 Digits on Back

Flip your card over and look in
 the signature box.

You should see the 16-digit
credit card number
- OR the last 4 digits of
 your credit card number
- followed by a special
3-digit code.

This 3-digit code is your
Card Security Code.

American Express -
4 Digits on Front

Look for the 4-digit number
 printed on the front of your card
 just above and to the right of
 your main credit card number.

This 4-digit code is your
Card Security Code.