Fact Sheets
03/29/2021
Customer Validation Tool Fact Sheet

This fact sheet is for the Customer Validation Tool accessible through the Business Customer Gateway. Information specific to balance checks is located here: https://postalpro.usps.com/balance-check

Fact Sheets
02/01/2021
Mailer Identifier (MID) Exception Process

The Postal Service will issue a Mailer Identifier (MID) to a mailer for use in the Intelligent Mail® container barcode, Intelligent Mail® tray barcode, Intelligent Mail® barcode or Intelligent Mail® package barcode. The MID is a field within the Intelligent Mail barcodes and is used to identify the mailer.

Fact Sheets
01/08/2021
Full-Service Certified Mail Service Providers (MSP) Information Sheet

The list of certified MSPs is updated frequently. To ensure that you have the most current list of certified MSPs visit https://postalpro.usps.com/certifiedmsps