A card reader device has a card entrance for receiving a card, such as an ATM card, a card enclosure in registration with the card entrance and defining an area in which the card is read, and a shutter for controlling access to the card enclosure from the card entrance. The card reader device also has a read head located in the card entrance for reading data from the card, and a controller for controlling the operation of the card reader device. The controller is operable to: (i) open the shutter in response to reading data from the card, and (ii) disable the read head when the shutter is opened.