CVV is an anti-fraud security feature to help verify that you are in possession of your credit card. For Visa/Mastercard, the three-digit CVV number is printed on the signature panel on the back of the card immediately after the card's account number. For American Express, the four-digit CVV number is printed on the front of the card above the card account number.

VISA/MASTERCARD/DISCOVER
A last 3-digit number on the Signature Panel on the back of the card.


AMERICAN EXPRESS
A four-digit number on the front of the card above the 15-digit account number.