Since the late 1990s, VISA, MASTERCARD and American Express have all used CVV passwords. CVV is an important security coating that helps reduce the risk of your cardless transactions and may be required or recommended by your payment processors and commercial banks. alue)The CVV2 is the last 3 digits after the credit card number on the back of the card in the signature area.alue)The CVV2 is the last 3 digits after the credit card number on the back of the card in the signature area. (see picture)ode)The CVC2 is the last 3 digits after the credit card number on the back of the card in the signature area.ode)The CVC2 is also the last 3 digits after the credit card number on the back of the card in the signature area. (See picture)entification) The American Express credit card code is printed on the front of the card, located on the upper right side of the highlighted credit card number!