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.