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 ...

US credit card giants said they will implement a new merchant category code for the nation's gun retailers, which gun control activists say will help flag potential mass shooters and gun traffickers.

NEW YORK — Payment processor Visa Inc. said Saturday that it plans to start separately categorizing sales at gun shops, a major win for gun control advocates who say it will help better track ...

The move was approved by a group that sets standards for business transactions, but it was unclear how companies and banks would carry it out. By Andrew Ross Sorkin An organization that sets standards ...