How should PO Boxes be handled in an address management system?

How should PO Boxes be handled in an address management system?

• A. PO Box should be disallowed
• B. PO Box is treated as a physical address
• C. PO Box is a valid address type; treat differently from street addresses for validation and geocoding; display in UI
• D. PO Box is ignored

Answer: (C)

PO Boxes are a legitimate address type used for mail delivery, so they should be accepted and stored in the system, but handled differently from street addresses. Validation needs to recognize the PO Box format and require the appropriate accompanying fields (city, state, ZIP) without trying to fit the box into a street-address field. For geocoding, a PO Box doesn’t map to a precise physical location, so you either skip standard geocoding or assign a location to the post office and flag it as non-geocodable. The UI should display the PO Box clearly as its own address type, so users understand it’s for mail rather than street delivery. Disallowing or ignoring PO Boxes would lose legitimate addresses, and treating them exactly like street addresses would lead to incorrect validation and mapping results.