Criminals posing as technicians are thought to have hidden devices that captured bank details and personal identification numbers (pins) in till terminals.
The customer hands over their card and it is swiped to obtain a copy of the magnetic data and then the customer is requested to enter their PIN. Once a new card has been created it may be used at any cash machine in the country - this should enable the criminals to obtain perhaps £500 a day from each card!
Cash machines can read either the Chip or the magnetic strip, but since many cards - mainly overseas cards - do not have a chip, they must be able to 'fall back' onto reading the strip.
My advice, only enter your PIN when your card has been inserted into a Chip reader, not when swiped by the cashier - or taken out of view.