A merchant category code — or an MCC — is a four-digit number used by credit card companies to classify businesses for payments, taxation and rewards purposes. MCCs affect the interchange rates and ...

Merchant category codes, sometimes called MCC codes or merchant codes, classify merchants based on the products or services sold. Credit card issuers use these codes to determine how to categorize ...

Discover how the Luhn Algorithm verifies credit card accuracy, supports secure transactions, and helps prevent errors in inputting Social Security numbers.

Most businesses that accept credit cards are assigned a merchant code, sometimes called a merchant category code. It’s a four-digit number that tells the credit card processing companies a little bit ...

Credit card security codes are three-digit codes on the back of your card (four-digits on the front if you have an American Express card) used to verify that have the physical card. You typically ...