In the preferred embodiment of the invention, a currency security box is releasably secured to a frame within a device, such as a vending machine, gaming machine, gaming table, amusement machine, bank machine or the like, and is automatically released from the frame by sliding a transportable security box cover over the security box. At the position where the security box cover releases the box from the frame, the security box cover also effectively encloses the security box and automatically latches onto the security box. The security box, along with the security box cover, may now be removed from the frame and the device. The security box cover includes a locking device which must be activated to release the security box cover from the security box so as to gain access to the currency in the box.