A system for use in banking operates responsive to data included in data bearing records. The system is suitable for securing the contents in safety deposit boxes or similar locked receptacles, and selectively permits access to key locks only to individuals who have been determined to be authorized to have such access. Each safety deposit box or other receptacle includes a door (16) with at least one key lock (22, 24) thereon. The assembly includes a body (32) that is held in a blocking position by a cover lock. A selectively programmable data bearing electronic key module (28) is operative to change the condition of a selected cover lock from a latched to an unlatched condition. Electronic key modules are appropriately programmed to enable the particular user access to key locks on a particular safety deposit box, through operation of a customer station (126).