Visa, MasterCard and Discover
users
The Card ID Number is the 3-digit
number located on the back of your card, usually at the top of
the signature strip.
|
American Express users
Look for the 4-digit number printed on the front of your card.
Depending on which card you have, you'll find this number in
small type above your credit card's main number on either the
left or right side. |
