Patent 10152615 was granted and assigned to NCR Corporation on December, 2018 by the United States Patent and Trademark Office.
A method of detecting interference with a fraud prevention transmitter on a self-service terminal is described. The method comprises: detecting presentation of a card at a card reader; attempting to detect a customer while the card is presented; and triggering an alarm event if the customer is not detected while the card is presented on a predetermined number of occasions.