Announcements
03/21/2024
Post Office/ZIP Code Entries for Postal Bulletin 3/21/2024

This spreadsheet provides details on the Post Office/ZIP Code entry changes for Postal Bulletin issue 3/21/2024.

Announcements
03/21/2024
User Guides
03/20/2024
Informed Delivery Create Campaign Use Case for Mailers

This user guide provides a summary of use cases for Informed Delivery interactive campaigns through the Mail.dat file format via PostalOne!® Electronic Documentation (eDocs).

Data Files
03/20/2024
Zone Chart and Exceptions Test Files for Zone 10

Download this sample Test file to help prepare you for the proposed Zone 10.  Zone 10 will be represented as follows in the Zone Chart files - A in the Zone Chart Matrix and 10 in the Exception File. The Zone Chart Matrix has only a single character field for the zone, while the Exception File has a two-character field.  The test files are encrypted - contact labellist.ncsc@usps.gov for the encryption password.

Tech Guides
03/20/2024
Informed Delivery Mail.XML Mailer Guide

This is a guide for submitting campaigns to PostalOne! via Mail.XML electronic documentation (eDoc).

Tech Guides
03/20/2024
Informed Delivery Mail.dat Mailer Guide

This is a mailer guide for creating campaigns via PostalOne! through Mail.dat eDoc submission.

Tech Guides
03/19/2024
CASS™ Technical Guide for Cycle O

This document provides a technical guide for the CASS™ product. The CASS certification process is designed in cooperation with the mailing industry to improve the accuracy and deliverability of addresses for mail qualifying for postal discounts.