324 Business–to–Business List Updates | Postal Explorer

The Wayback Machine - https://web.archive.org/web/20190603155549/https://pe.usps.com/text/pub28/28c3_008.htm

324 Business–to–Business List Updates

Once files are updated, it is important to establish list management procedures to ensure timely updates and maintain accuracy. It is highly recommended that new addresses go through a verification and standardization process to obtain the correct ZIP+4 and delivery point codes prior to adding them to your master address list.