Adam identifies the word “box” as the most problematic term in addressing. While the USPS has coding logic to handle legitimate uses of “box”—such as PO boxes, military addresses, or highway contract addresses—this usage creates significant complications when organizations use it as an internal mail stop designator.
Key points regarding this issue include:
- Internal Mail Routing vs. USPS Delivery: Many institutions, particularly hospitals, use “box” numbers to route mail to specific departments or doctors internally.
- Software Misinterpretation: Because the USPS does not recognize these as internal markers, address verification software may interpret “box” as a directive to route the mail to a physical PO box.
- Routing Errors: If a PO box number matching the internal “box” number exists within the same city, state, and zip code, the software may automatically update the address to that PO box, causing the mail to be routed incorrectly.
- The Persistent Cycle: Once a record is incorrectly updated in a database, the problem persists; manually changing it back to “box” does not prevent the software from flagging it and making the same error during the next processing cycle.
