A system for delivering and/or picking up items comprising a container, which is closable via an openable/closable door and has access protection, and a standardized coupling mechanism for the option of fastening on a delivery vehicle, a mobile mini-vehicle or a stationary upright, wherein the coupling mechanism comprises a receiving means on the holder and comprises an engagement means, which is for engagement in the receiving means and is arranged on the delivery vehicle, on the mobile mini-vehicle and on the stationary upright such that the container is securable in a releasable manner optionally on the delivery vehicle, on the mobile mini-vehicle or on the stationary upright, and a corresponding method.