Data Files
06/25/2025
Informed Visibility® Mail Tracking & Reporting (IV®-MTR) Operation Codes List

This spreadsheet provides a list of operation codes (opcodes), also known as Scan Event Codes, for the IV-MTR application.

Announcements
06/24/2025
DELIVERY - Central Area – Ohio 1 District Graytown Post Office (43432)
Announcements
06/24/2025
DELIVERY - Southern Area – Arkansas Oklahoma District Center City Station (73102) – Temporarily Suspended
Announcements
06/24/2025
INFORMATIONAL - USPS APIs System Maintenance June 25, 2025
Announcements
06/24/2025
DELIVERY: WestPac Area - ID-MT-OR District - Keno Post Office-Resumed Operations
Announcements
06/18/2025
INFORMATIONAL: Holiday Schedule: June 30 - July 4 Recommendations for Live Animal Shipping
Announcements
06/18/2025
DELIVERY - WestPac Area: ID-MT-OR District Office Keno Post Office - Temporarily Closed
Announcements
06/18/2025
DELIVERY: WestPac Area: AZ-NM District Office - Mimbres and Hanover Post Offices - Temporarily Closed
Announcements
06/18/2025
DELIVERY - INTERNATIONAL SERVICE SUSPENSION NOTICE – Effective June 20, 2025
Tech Guides
06/18/2025
PostalOne! Release 62.0.0.0 Mail.XML CAT WSDLs

This ZIP file contains the Web Services Description Language (WSDL) and XML Schema Definition (XSD) files for Mail.XML™ CAT Release 62.0.0.0