Abstract: A system and method for providing a vending machine with the ability to accept both coins and paper currency. The system includes a housing that is mounted to the side of a vending machine. The housing defines an enclosed interior area that is adjacent the vending machine. A door is provided on the housing for selectively accessing the enclosed interior area. At least two access openings are present in the door. A paper currency validation mechanism is mounted in one of the access openings in the door. A coin currency validation mechanism is mounted in a second access opening in the door. Since both the paper currency validation mechanism and the coin currency validation mechanism are mounted to the door of the housing, both mechanisms are removed from the housing when the door of the housing is opened or removed.