California this month became the first state to require credit card companies to create a unique four-digit code for stores selling firearms. And on the same day the law took effect in California, ...

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 ...

Related video above: Maryland state law bans sale, receipt of unregistered 'ghost guns'U.S. credit card giants said they will implement a new merchant category code for the nation's gun retailers, ...

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This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. (FOX40.COM) — California is taking more ...

A new code identifying credit card sales of guns and ammunition has been approved by the International Standards Organization, creating a potential path for card networks to help law enforcement ...