A new type of debit card skimmer is showing up in Europe, and it looks much thinner than some of the clunky models that are attached to the outside of machines. In the United States, the most popular location for card skimmers is actually at the gas pump – most gas stations have pay-at-the-pump card readers, which vary from station to station, making detection more difficult. Most thieves know that ATMs have cameras focused on them, while similar measures are not always in place at a gas station.
One astute commenter offers a potential remedy to this phenomenon – just put up pictures of how the card-reader is supposed to look next to the actual machine! Assuming you could properly tamper-proof the picture, I think this is a good idea but I’m not sure if people would even bother to look at the picture.
If you’re interested in learning more about skimmers, Brian Krebs has a whole series on the topic – there’s clearly no lack of creativity when it comes to pilfering card info!