The paper logbook and the shoebox of slips
Couriers stack boxes while the phone rings. Somebody logs it later — or doesn't. Residents call down all day asking "anything for 4B?"
Snap the label. On-device OCR reads it, the resident is notified automatically on the channels they chose, and the carrier's delivery receipt comes back into the log. Pickup is recorded with who collected and when. Works offline; syncs when the desk is back online.