I had a rash of these a few years ago. 4 different instances with 3 different cards. Never could exactly figure out how they got my numbers. They do it in a number of different ways. Skimmers, they can walk behind you and read the cards in your wallet with a device they carry, some of these scams are done through computers just generating numbers and trying to use them with very small amounts to see if the card works etc etc. I bought a credit card device that I keep in my wallet that blocks the devices that can read your cards and always check the skimmers at stores and gas stations before I use them. Also, the chips on the card seem to help.I haven't had a problem in a few years now. The device I bought is called SignalVault and you can buy it on Amazon.
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"The secret of successful managing is to keep the five guys who hate you away from the four guys who haven't made up their minds." - Casey Stengel
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