Abstract: The module is a prefabricated free-standing structure with a floor 9 of reinforced concrete and, secured to the floor, a unitary body of reinforced concrete comprising a roof 5 and side walls 4 integral with the roof. There is an unimpeded approach to the structure such that an automobile 15 can be parked alongside the side wall, and the structure includes an enclosed secure repository accessible through the side wall, such that a driver seated in the driver's seat of the automobile parked alongside the side wall can either deposit articles into the repository through the wall, or conduct a secure transaction such that a selected article or articles (such as a supply of cash) stored in the repository can be dispensed to the driver.