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Customer Registration ID (CRID)

The USPS® Customer Registration ID (CRID) is a unique number that identifies a specific business location involved in a mailing. In order to submit electronic documentation (and receive Full-Service benefits), customers must have a customer registration ID assigned to their business location. 

Who is CRID for?

Mailers and mail service providers submitting electronic documentation (eDoc).

First Class Mail
Standard Mail


A Customer Registration Identification number (CRID) is a USPS-generated numeric code of up to 15 digits that uniquely identifies a business at a location. Each MID (Mailer ID) is owned by a single CRID at any given time and each mailing permit is owned by a single CRID at any given time.

A CRID is created for you when you create a Business Customer Gateway account. Your CRID information is visible when you log in to your Business Customer Gateway account page.


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Featured Resources

Mailer IDs (MID) and Customer Registration IDs (CRID) Version 3

Related Products

Mailer Identifier (MID)

The Mailer Identifier (MID) is a field within the Intelligent Mail barcode that is used to identify mailers. MIDs are assigned by the USPS® to a Mail Owner, Mailing Agent or other service providers who request them.

Electronic Documentation (eDoc)

To participate in Full-Service Intelligent Mail®, mailers must submit information electronically. This computer-consumable version replaces existing hardcopies and includes the following: postage statement and qualification report.

Seamless Acceptance

Seamless Acceptance automates the entry and verification of commercial mailings by leveraging electronic documentation, Intelligent Mail barcodes (IMbs), and information collected from handheld sampling devices and mail processing equipment scans.


The electronic Induction (eInduction) process simplifies the induction of drop shipments and expedited plant load mailings by leveraging existing eDoc, Intelligent Mail Container barcode (IMcb), and handheld scanner technologies to verify payment and preparation of commercial mail containers.


For questions, please call 1-800-522-9085 or email