FIELD: radio engineering, communication.SUBSTANCE: according to one embodiment, the delivery processing device (1) comprises a plurality of receivers (30) configured to place the delivered objects (S) in them; a conveyor (40) configured to transport the delivered objects (S) to a designated receiver (30) from a plurality of receivers (30); the first detector (35) configured to determine that the monitored receiver (30) from the plurality of receivers (30) is in an overflow state in which more than a predetermined number of delivered objects (S) has been accumulated; the second detector (37) configured to determine that the monitored receiver (30) from the plurality of receivers (30) is in an empty state in which all the delivered objects (S) are extracted from the noted receiver (30); and a main controller (50) configured to select a regular receiver from a plurality of receivers serving as a sorting destination for the delivered object based on the address information obtained from the delivered object, and
