What is the CVV security code?
It is an important new Internet security feature that now appears on the back of most Visa/MasterCard and Discover cards. This new code is a three or four-digit number which provides a cryptographic check of the information embossed on the card. The security code helps validate that the customer placing the online order actually has the credit card in his/her possession, and that the credit/debit card account is legitimate.
