What does “Received By Agent” mean? You probably have seen that and a dozen other terms and not understood. The USPS uses such terminology as part of its mail and package tracking known as PTR (Product Tracking Codes). Here is an updated list of the codes, terms, and descriptions utilized to track mail and packages. To see a complete PDF of the codes and terms with other information click here: Event Code / Description 01  DELIVERED The article has been delivered and a delivery scan recorded the time and date of delivery. 02  NOTICE LEFT Delivery was attempted. The notice shows options for pickup or re-delivery. 53  RECEPTACLE BLOCKED The path to the delivery receptacle was blocked by some physical condition. 54  RECEPTACLE FULL/ITEM OVERSIZED The item could not be placed in the delivery receptacle, either because the receptacle was full or because the item was too large to fit. 55  NO SECURE LOCATION AVAILABLE There was no location deemed safe to deliver the item and there was no endorsement to ‘leave if no response’. 56  NO AUTHORIZED RECIPIENT AVAILABLE The item could not be delivered because a signature was required. 03  USPS IN POSSESSION OF ITEM If the item … Continue reading Postal Mail Tracking Codes: What They Mean