A protective covering is formed to hang from a realtor' s lock box in such a manner that the U-shaped shackle passes through a mid-portion of the covering, and two hanging flaps extend from this mid-portion to hang on opposite sides of the lock box. The forward flap which extends away from the door is preferably provided with at least one window region to receive a realtor' s business card, or for posting messages. The rear flap is interposed between the lock-box and the door to protect the door from abrasion.