What is CVN?

Card Verification Number (CVN) also known as Card Verification Value (CVV), Card Identification Digit (CID) or Card Security Code (CSC) is an additional security feature for internet and phone based payments. The CVN can be either three or four digits in length depending on the card issuer.

For example, VISA, MasterCard and Diners Club show the CVN as the last three-digit number printed on the signature panel on the back of the card.

For American Express, the CVN is the four-digit number printed on the left or right of the card, above or below the card number.