Early Warning System (EWS002C0.ZIP)

This file is the EWS production file and is updated weekly. This file contains the Early Warning System data file for the CASS™ and MASS™ certification process.

PTR2 Release Notes_DD_05_28_26

INFORMATIONAL - Commercial System Releases (May 30 – June 5)

PTR2 Release Notes_DD_05_26_26

Labeling List Changes Effective July 1, 2026

Effective July 1, 2026, the Postal Service™ will revise Labeling List(s) L001, L007, L009, L012, L016, L201, and L606 to reflect changes in mail processing operations. Mailers are expected to label according to these revised lists for mailings inducted on or after the July 1, 2026, effective date through August 31, 2026, expiration date. The changes will be published in the Postal Bulletin, Issue #22704.


 

INFORMATIONAL - July Price Change 2026 - Commercial System Releases June 28, 2026

INFORMATIONAL - Scheduled Commercial System Release - June 28, 2026

USPS APIs Release Notes

For the latest updates, please review the USPS APIs Release Notes.

PROCESSING AND DISTRIBUTION - Western Region – Tucson, AZ P&DC - Power Outage

Mail Service Provider (MSP) - Full-Service Certified Mailers

A Mail Service Provider (MSP) offers a variety of solutions to prepare and present Full-Service presort mailings. For more information regarding Certified MSPs, please follow this link: https://postalpro.usps.com/full-service-cert/fact-sheet