Abstract: A protective enclosure for vending apparatus includes a housing and door structure having a locking assembly therefor. The door has a peripheral channel, and an elongated sleeve is attached to the door so that opposite ears on the sleeve are positioned in the channel. A latch bar is inserted through the housing and the sleeve to prevent opening of the door, and a keyed lock mechanism, which is mounted entirely within the enclosure, has a locking element that lockably engages the latch bar. Fingers may be provided on the door which fingers engage slots in the housing to prevent removal of the door by breaching the hinge. Adjustable spacers on the sleeve interact with the latch bar to firmly seat the door when the latch bar is inserted into the sleeve.