Announcements
11/08/2004
Letter to CASS™ Vendors

The USPS® Address Management office has determined that there is a small percentage of addresses that will produce a false positive match when presented to the DPV™ Split File Product.

Data Files
Labeling List File *Moved*

Please note that this file has been moved to https://postalpro.usps.com/operations/labeling-lists/changes-september-2025. We apologize for the inconvenience. 


Industry Events
The Mailers’ Technical Advisory Committee (MTAC) and the United States Postal Service (USPS) host industry engagement events to facilitate collaboration, provide technical updates, and address mailing and shipping industry needs.