The idea that outdoor ATMs are among the most dangerous places to swipe a debit card seems a little bit absurd. But some ATMs present the perfect opportunity for thieves to skim users' debit cards, says Chris McGoey, a security consultant based in Los Angeles.
Skimming is a method of capturing a bank customer's card information by running it through a machine that reads the card's magnetic strip. Those machines are often placed over the real card slots at ATMs and other card terminals.
You're better off using an ATM inside a retail outlet or other high-trafficked, well-lit place.
Julie Conroy, research director for the retail banking practice at Aite Group, a Boston-based financial services research firm, says even the card terminals that card users must swipe to get into ATM vestibules are being used as a skimming site by criminals. You can spot ATM skimmers by checking for ATM components that look beat-up or askew, she says.
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Stealing PINs at gas stations
Gas stations are another danger zone for debit card use. The payment terminals have many of the characteristics card fraudsters love, Conroy says.
"In a gas station where you do have a whole bunch of pay-at-the-pump kinds of things and minimal supervision, it's pretty easy for a bad guy to put a skimming device on and put a little pinpoint camera there and compromise debit cards that way," Conroy says. Thieves often use small cameras to capture footage of debit card users entering their PINs so they can have free access to their money.
She says even if the thief doesn't manage to get your debit card personal identification number, or PIN, from such a device, he still may be able to duplicate the card's magnetic strip and use it for "sign and swipe" Visa or MasterCard transactions.
With the high potential for fraud in pay-at-the-pump debit transactions, it might make sense to use an alternative such as cash or credit cards the next time you fill up.
The web is a risky place
Debit cards are a convenient way to buy products online, especially for those who don't like to use credit cards. Unfortunately, the web is one of the most dangerous places to make purchases, Conroy says.
"Online is the No. 1 place where consumers should not use their debit cards," she says. "It's susceptible at so many points. The consumer could have malware on their computer, so it could be at their endpoint that the data get compromised. It could be a man-in-the-middle attack where somebody is eavesdropping on their communications via the wireless network. And then at the other end, that data goes into a database at the merchant. As we've seen with some of the higher-profile breach events ... that data is going to be vulnerable if (they're) not properly cared for."
Aside from the potential for hacking at many different points in a transaction, a fundamental problem with using debit cards online is it's impossible to know who is handling your information.
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Restaurants keep customer data on file
"Would you care for a side of debit card fraud with that?"
Restaurant servers don't ask that question, but they might as well with the standard practice of taking customers' debit cards to run them behind closed doors.
"Any place where the card is out of hand" can increase the chances of fraud, says McGoey. "The guy comes to your table, takes your card and disappears for a while, so he or she has privacy," giving that person the opportunity to copy your card information.
Even restaurants without sit-down service can present a threat. Conroy says using debit cards to order delivery can be risky because cashiers tend to keep customer payment information on file. That may make future orders more convenient, but small businesses rarely take the steps necessary to safeguard payment information, she says.