03/11/2026
03/11/2026
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03/11/2026
Merchant Onboarding and Authorization Tech Guide
Merchants need to follow a two-step process to authorize a Label Provider to generate shipping labels on their behalf.
1. Log in or create a USPS business account on the Customer Onboarding Portal (COP) to get Customer Registration ID (CRID), Mailer ID (MID), and Enterprise Payment Account (EPA). A CRID is a unique identifier for your company. A MID is another identifier which can be part of the barcode on a piece of mail.
2. Authorize Label Provider in COP. Before the merchant’s account can be used by Label Provider, Label Provider must be authorized. This will also enable Label Provider to generate package labels on behalf of NSA Holders at their NSA rates.
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03/10/2026
03/11/2026
USPS Business Portal (COP) Onboarding User Guide
The United States Postal Service (USPS)Business Portal (COP) offers business customers a modern, streamlined way to create and manage a USPS business account set-up and onboard core services.
03/11/2026
Business Portal User Account Creation
Instructions for new USPS Business Customers to generate a new account.
03/11/2026
MyPFS Portal in MPP Coming Soon - March 2026
Announcement of the release of the MyPFS product addition in My Product Portal.
03/11/2026
03/11/2026
03/11/2026
03/11/2026
03/11/2026
USPS APIs Release Notes
For the latest updates, please review the USPS APIs Release Notes.
03/10/2026
03/09/2026
03/09/2026
03/09/2026
03/09/2026
03/09/2026
03/09/2026
Cumulative Listing of ZIP Codes Covered by the LACS Database
This document provides a cumulative listing of ZIP Codes covered by the LACS database for LACSLink®.
03/09/2026
03/09/2026
03/09/2026
03/09/2026
03/09/2026
03/09/2026