The card security code is a unique three or four digit number, separate
from your credit card number. Your security code can be found in the
following locations on the following cards:
Visa/MasterCard/Discover
Your card security code for your MasterCard, Visa or Discover card is a
three-digit number on the back of your credit card, immediately
following your main card number.
Apple Credit Account
Your Apple Credit Account security code appears on the back of your
card, just like the MasterCard photo to the right. If you have not yet
received your plastic card, your security code is not required.
American Express
The card security code for your American Express card is a four-digit
number located on the front of your credit card, to the right or left
above your main credit card number.
If your security code is missing or illegible, please call the bank or
credit card establishment referenced on your card for assistance.