Credit card scammers targeting retailers, self-checkout lines

Last month, thieves at Walmart stores in Virginia and Kentucky used skimmers -- devices placed over credit card readers -- to gather information and pin numbers and make duplicate cards. A skimmer works by recording the digital information from a swiped card, and a micro-camera captures the pin number. Those are sent to the thief via Bluetooth or removed later. In a security video, one man shields his partner, who pulls the skimmer out of his jacket and pops it in place.
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