An issue number on a debit or credit card is a single- or two-digit number that indicates the number of new cards issued, starting with one. It was an older security method previously used to distinguish reissued credit cards. Nowadays, credit card companies do not rely on issue numbers anymore, and they are rarely found on U.S. and Canadian credit and debit cards like Visa and Mastercard. In the past, credit card companies kept the original account numbers, added the issue number on cards, and changed the expiration dates and CVC/CVV numbers when sending out new cards. However, this practice is still going on in some countries. Visa gift cards and Visa debit cards do not have issue numbers. If a Visa card has an issue number, it would be on the front of the card or on the bottom right corner. However, it is unlikely to find one since credit card companies do not rely on these anymore. Many people confuse CVC/CVV numbers with the idea of issue numbers, but the two are different. The CVC/CVV number is a three- or four-digit number on the back of the card that serves as a card verification number or code.