Where to find the CVV (also known as Security Code) number? On a Visa or MasterCard, please turn your card over and look in the signature strip. You will find (either the entire 16-digit string of your card number, OR just the last 4 digits), followed by a space, followed by a 3-digit number. That last 3-digit number is the CVV number. (See below) On American Express Cards, CVV number is the 4-digit number that appears above the end of your card number. (See below)   Visa & MasterCard : This number is printed on your MasterCard & Visa cards in the signature area of the back of the card. (it is the last 3 digits AFTER the credit card number in the signature area of the card). IF YOU CANNOT READ YOUR CVV2 NUMBER, YOU WILL HAVE TO CONTACT THE ISSUING CREDITOR.   American Express : American Express cards show the CVV2 printed above and to the right of the imprinted card number on the front of the card. Close this window.