Customer Verification Number
This number is a recent feature intended to reduce credit card fraud. For added security, we ask that you provide your credit card's CVV2/CVC2/CID/CVN when placing an order on-line. This is NOT your credit or debit card PIN number. It is an extra number printed on your Visa, MasterCard, Discover, or American Express Card. Omitting the CVN when placing an on-line order may cause a rejection of the card by the credit card company and a delay in delivery.
Where to find your CVN:

Visa, MasterCard, and Discover: On the back of your card, in the signature box. You will see either the entire 16-digit credit card number or just the last few digits followed by a 3-digit code. This 3-digit code is your CVN.
American Express: On the front of the card. The CVN is the four-digit number on the right and above the credit card number. This 4-digit code is your CVN.