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Credit Card Security Codes

Where can I find my security code?

Visa/MasterCard Users

American Express Users

What is the security code?

The Credit Card Security Code is an important Internet security feature that appears on the back of most Visa and MasterCard cards, and on the front of American Express cards. This code is a 3- or 4-digit number that provides a cryptographic check of the information embossed on the card.


Do I have to enter my security code?



How does my security code protect me?

The security code is printed only on the card—it is not contained in the magnetic stripe information, it does not appear on sales receipts or billing statements and it is not stored electronically by Ducks Unlimited. You must have the card in your possession in order to use this code.

Credit Card Security Codes do not have a raised surface, so they are not scanned into standard credit card readers. In theory, these numbers are visible only to you. When you give your security code to a merchant, you assist the merchant in verifying that the order is being placed by you, the cardholder.