Self-service terminal with cash trap device prevention

A terminal, comprising:

• a media dispenser slot;
• a shutter mechanism having a door or flap portion that is configured to cover the media dispenser slot in a closed position and to provide access to the media dispenser slot in an open position;
• a first sensor mounted adjacent to the media dispenser slot facing an inner surface of the door or flap portion of the shutter mechanism, the first sensor configured to generate a first signal representing a distance from the first sensor to the inner surface of the door or flap portion of the shutter mechanism;
• a second sensor mounted adjacent to the media dispenser slot, the second sensor configured to generate a second signal indicating whether the door or flap portion of the shutter mechanism is open or closed;
• a processor;
• and
• a non-transitory computer readable storage medium comprising executable instructions that cause the processor to perform operations comprising:
• receive the first signal and compare the received first signal to a predetermined distance threshold to determine if an overlay device has been attached to the terminal;
• receive the second signal and, based on the second signal, calculate an open time for each time the door or flap portion of the shutter mechanism moves from the closed position to the open position and then back to the closed position;
• and
• compare the calculated open time to a predetermined range of open times and, when the calculated open time exceeds the predetermined range of open times, increase the predetermined distance threshold.

A terminal, comprising:

• a main display;
• a keypad;
• a media dispenser slot;
• a shutter mechanism having a door or flap portion that is configured to cover the media dispenser slot in a closed position and to provide access to the media dispenser slot in an open position, the door or flap portion having at least a part thereof that is transparent;
• a touch sensor mounted on an outer surface of the door or flap portion of the shutter mechanism and the media dispenser slot, the touch sensor configured to generate a signal when touched by a user;
• a second display mounted between the door or flap portion of the shutter mechanism and the media dispenser slot, wherein the second display is viewable through the transparent part of the door or flap portion of the shutter mechanism;
• a first sensor mounted adjacent to the media dispenser slot facing an inner surface of the door or flap portion of the shutter mechanism, the first sensor configured to generate a first signal representing a distance from the first sensor to the inner surface of the door or flap portion of the shutter mechanism;
• a second sensor mounted adjacent to the media dispenser slot, the second sensor configured to generate a second signal indicating whether the door or flap portion of the shutter mechanism is open or closed;
• a processor;
• and
• a non-transitory computer readable storage medium comprising executable instructions that cause the processor to perform operations comprising:
• receive the first signal and compare the received first signal to a predetermined distance threshold to determine if an overlay device has been attached to the terminal;
• receive the second signal and, based on the second signal, calculate an open time for each time the door or flap portion of the shutter mechanism moves from the closed position to the open position and then back to the closed position;
• compare the calculated open time to a predetermined range of open times and, when the calculated open time exceeds the predetermined range of open times, increase the predetermined distance threshold;
• cause a code to be displayed on the second display when the user requests a media withdrawal;
• provide instructions via the main display instructing the user to enter the code displayed on the second display on the keypad and to touch the touch sensor;
• and
• only after the user enters the code displayed on the second display on the keypad and touches the touch sensor, causing a requested amount of media to be dispensed via the media dispenser slot and causing the door or flap portion of the shutter mechanism to move to the open position.