I believe that if they use a "Lebanese loop", then, yes, the villains will retrieve the card later (probably pretty soon). It might be tempting to hide and wait for them with a phone camera at the ready... but I really wouldn't advise it, as you don't know how many they are or what they might be capable of physically. There's more discussions and useful links on the existing thread that ianr mentioned. This scam also relies on a pinhole camera being installed somewhere in or close to the machine to video your PIN number. The single most simple thing you can do is ALWAYS shield your typing hand with your other hand - in shops and garages as well as at cash machines. It's actually worth practising so you can key your PIN accurately "blind".