A frequent crime in Brazil is a scheme in which thieves kidnap people as theyre leaving a bank and free them only after visiting a number of ATMs to withdraw cash. In these so-called flash hijacks the thieves pull out a wireless card reader, swipe a few debit transactions with the victims card, and then release the individual. The most important security advice is to watch out for your own physical safety while using an ATM. Use only machines in public, well-lit areas and avoid ATMs in secluded spots.”]
Source: https://krebsonsecurity.com/2016/09/flash-hijacks-add-new-twist-to-muggings/