The card security code is a special code feature of your card to provide added security for your transaction. It is a 3- or 4-digit number which is not part
of your card number. It appears only on your card and provides some assurance the card is in your possession
Discover®, Visa® and MasterCard® have the code in the last 3 digits of the number printed on the back of the card in the
signature field.
American Express® has 4 digits printed on the front of the card on the right side above the imprinted card number .