Costco customers complain of fraudulent charges before company confirms card skimming attack

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Costco has sent out breach notification letters to an unknown number of victims after multiple people took to social media to complain about fraudulent charges connected to the company.

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First reported by Bleeping Computer, the letter says payment card information was compromised through a card skimming device at certain Costco locations. 

“We recently discovered a payment card skimming device at a Costco warehouse you recently visited. Our member records indicate that you swiped your payment card to make a purchase at the affected terminal during the time the device may have been operating,” Costco said in the letter. 

“If unauthorized parties

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