Publications
07/14/2026
Catalog Incentive FAQ's
FAQs
07/14/2026
Marriage Mail Incentive FAQs

Marriage Mail is a form of direct mail in which marketing service companies combine or “marry” advertisements (e.g., coupons or sales notices) from multiple companies into one mail piece to reduce the cost of the mailing for individual advertisers. This type of direct mailing product allows businesses to reach targeted customer segments.

Announcements
07/13/2026
INFORMATIONAL - Updated PostalOne! System (PO!) – Delivery Sort Container Discount not applied
Technical Specifications
07/13/2026
USPS APIs Access Control Data Dictionary

Detailed information on the USPS APIs data elements available through the Informed Visibility Mail Tracking & Reporting (IV-MTR) application for API Access Control.

 

Announcements
07/13/2026
INFORMATIONAL - PostalOne! System (PO!) – Delivery Sort Container Discount not applied