How does the USPS differentiate between deliverable and undeliverable addresses?

The United States Postal Service (USPS) employs a combination of address verification and geolocation systems to differentiate between deliverable and undeliverable addresses. These systems utilize databases that contain validated addresses, which helps in ensuring that the address exists within the postal delivery network and that it is capable of receiving mail.

Address verification checks against databases that include standardized address formats and validates them against known delivery routes. Geolocation systems further assist by pinpointing the physical location of addresses, which helps confirm that they are accessible and legitimate. This ensures that mail can be efficiently and accurately delivered to intended recipients.

While customer feedback, community surveys, and observations by postal workers may contribute to understanding delivery challenges or addressing anomalies, the primary reliance on technology-driven methods such as address verification and geolocation systems provides a systematic approach to ensure accurate mail delivery across the vast network of addresses serviced by the USPS. This incorporation of technology is essential in handling the increasing complexity and volume of mail in today's digital age.