Effective October 6th, 2005, this field is a required part of the checkout process.

What is a CVN number and why do I need to enter it? CVN stands for Card Verification Number (sometimes called CID - card identification number or CVC - card verification code), and it is one of the ways that merchants and card issuers are working together to increase credit card security. The number is a 3 or 4 digit code that is added to your card on either the back, above the signature strip, or the front, above the embossed number. It never appears on receipts or imprints of your card. For your protection, we do not store CVN numbers in your records, even if we store your main credit card number. You will need to enter your CVN each time you make a purchase.