How to find your card security code:
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 3-digit number is your card security code. (See below)

What is the card security code?
This is a security measure we require for all transactions. Since the card security code is a number is listed on your credit card, but is not stored anywhere, the only way to know the correct number for your credit card is to physically have possession of the card itself. All VISA, MasterCard made in America in the past 5 years or so have a security code number, while those in Europe and Asia will be joining this program shortly** (please see bottom).

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 CARD SECURITY CODE, YOU WILL HAVE TO CONTACT THE ISSUING CREDITOR.
 

**If your European or Asian credit card does not have a card security code, you may enter 000 as your card security code.