Visa/ MasterCard
3 or4-digit, non-embossed number printed on the signature panel on the back of the card immediately following the card account number. This number recorded as an additional security precaution.
American Express
4 digit, non-embossed number printed above your account number on the face of your card. This number recorded as an additional security precaution. Newer American Express cards may also require a 3 digit number from the back of the card.
