Abstract: A collection receptacle for receiving valuables which are contained in a box having a discharge opening whereby the box can be received within the receptacle, unlocked thereby, and then moved to a position so that the valuables therein are discharged into the receptacle. The door of the receptacle carries drive means engageable with the box to achieve the movement necessary for the discharging operation. A locking arrangement comprising a movable blocking member is associated with the receptacle, and this blocking member is moved into a blocking position relative to an arm associated with the door when the driving action is commenced. The blocking member is mounted on a rod which extends to the rear of the receptacle, and a mounting plate for the box at the rear of the receptacle is operatively connected to the rod to achieve movement of the blocking member into blocking position.