Printed Number

Printed number is a four-digit number that is printed below the first four digits of the embossed number on all valid MasterCard and Visa cards. The printed number should begin with a "5" for all MasterCard cards and with a "4" for all Visa cards and be the same as the first four digits of the embossed number. The printed number is one of the card security features that merchants should check to ensure that a card-present transaction is valid.