Fact Sheets
12/18/2025
Addressing Fact Sheet for First-Class Flats

This document is for mailers who are sending flat-size mail (such as large envelopes) at Automation and Presorted First-Class Mail prices. To use these prices, you must mail at least 500 pieces at a time, prepared and sorted according to Postal Service guidelines. 

Tools
12/18/2025
Speakers Bureau List 6.0 - 12.18.25
Tools
12/18/2025
Financial Audit Reporting Tool v4
Tools
12/18/2025
PCC Event Planning Template 5.0 - 12.15.25
Announcements
12/18/2025
INFORMATIONAL - USPS Ship Payment Transaction Type Update for Monthly Assessments
Announcements
12/18/2025
INFORMATIONAL - Reminder - Christmas and New Year's Holiday Recommendations on Live Animal Shipping
Announcements
12/18/2025
DELIVERY - UPDATE - WestPac Area - Washington District - Hamilton Post Office (98255) - Temporarily Closed
Contact Lists
12/18/2025
CASS™ Certified Products Guide: Residential Delivery Indicator Cycle O - (Expires July 31, 2028)
Contact Lists
12/18/2025
RDI™ Cycle O: Certified Products Guide (D) - (Expires July 31, 2028)

This document outlines the CASS/MASS certified vendors list for RDI™ Cycle O.

Contact Lists
12/18/2025
CASS™ Certified Products Guide: M L O C R Mailers/Users Data File Cycle O - (Expires July 31, 2028)