If you’re the type of person who already reflexively jiggles every card slot and looks for pinhole cameras whenever you go to swipe your card, despair. There is no 100% foolproof way to protect yourself, as proven by a pair of banditos who stole 3,600 card numbers after installing a credit card skimmer inside several gas pumps, reports the MountainView Voice.

There was no way for a customer to detect the devices from the outside. The crooks had keys which opened up the pumps and installed the skimmers to the circuit board.

The only thing you can really do is keep an eye on your balances and make sure to quickly report any suspicious activity you see on your account.

Duo arrested in skimming scam [MountaniView Voice]

PREVIOUSLY
Card Skimmer Shows Up On 7-Eleven Gas Pump
$300,000 Credit Card Skim Was “Model Employee” Scam

Want more consumer news? Visit our parent organization, Consumer Reports, for the latest on scams, recalls, and other consumer issues.