Three-digit security number that is printed on the back of most Visa credit cards. Requiring this number on order checkouts can reduce credit card fraud and chargeback instances significantly when used in addition to AVS protection.

A three-digit number printed in the signature space on the back of most credit cards, such as Visa, Mastercard, and Discover cards. On American Express Cards it is a four digit code. The CVV is designed to reduce credit card fraud by ensuring that the customer has the credit card in their possession.

A three digit number printed on the back of Visa credit cards. By making this number a requirement when collecting card holder information merchants can reduce the risk of fraud and charge backs.