A delivery receptacle for receiving objects (such as parcels, mail or other deliveries) deposited into the receptacle at residences or other building and locations, and securing the objects within the receptacle from unauthorized access. The receptacle has an input opening and a lid which can be moved between an open position which provides access to the input opening and a closed position which covers the input opening. The receptacle has a locking mechanism which may configured for any one of a plurality of operating modes, including a single-delivery mode which does not require an access code to the lid automatically locks after the delivery and a multi-delivery mode which requires the entry of a security code into a code-operated device to unlock the lid, open the lid, place the delivery into the receptacle, and close the lid which automatically locks closed.