RIBBS - USPS National Customer Support Center

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.

MIDs are either a 9-digit or a 6-digit numeric code and are assigned based on annual mail volume criteria. One 9-digit MID is assigned to a business location without a volume requirement.

How to obtain a Mailer ID
To request a Mailer ID (MID) go to http://www.usps.com/ and select the Business Customer Gateway located on the

Important Links

MID CRID Acquisition Quick Step (PDF)
Mailer ID Exception Process

Mailer ID Exception Process (PDF)
Mailer ID Application (PDF)
Additional Accounts Information (PDF)

Agent Application Processes

CRID/Mailer ID Agent Mail.XML Application Process Guides
CRID/Mailer ID Agent Excel Application Process (PDF)

Mailer ID System Release Notes 1.5 (PDF)

bottom right hand corner of the web page footer. You must either be an existing or a registered user, or can sign-up as a new user for a business account to gain access to the Business Customer Gateway. Once you have access, request the "Mailer ID" tool and proceed with the "Request a MID" button to obtain a MID.

Exception Process
If you need additional MIDs, not obtainable through the Business Customer Gateway-MID Tool, refer to the Mailer ID Exception Process. Mailing Agents who are authorized to obtain MIDs on behalf of Mail Owners, should refer to the Agent Application Process. All forms can be viewed and printed from the Important Links box on this web page. Complete the Mailer ID Application and the Additional Accounts Information sheet if applicable and submit them to the Business Mail Entry Unit (BMEU) or the Mailpiece Design Analyst for processing.

To locate your local Business Mail Entry Unit (BMEU) or Mailpiece Design Analyst (MDA), go to the following URLs:
www.usps.com/nationalpremieraccounts/findlocators.htm (BMEU locator)
https://ribbs.usps.gov/mda/mda.cfm (MDA look-up tool)

Program Registration Mailer ID Assignment
For shippers who enroll in Shipping Service programs using the Business Customer Gateway, one 9-digit (master) Mailer ID is initially assigned. Subsequent 9-digits are assigned based on a Mail Owner single business or a mail service provider's single-client business shipping location.

Contact Information:

Intelligent Mail
Phone: 800-522-9085
Email: IntelligentMailSupport@USPS.GOV
Page updated: 7/26/2012

Click here for the Network Rationalization Consolidations (Winter 2013)

On the Move

The National Customer Support Center (NCSC) is moving its office location. Starting Dec. 1, the new address for the NCSC will be:

NATIONAL CUSTOMER SUPPORT CENTER
UNITED STATES POSTAL SERVICE
225 N HUMPHREYS BLVD STE 501
MEMPHIS TN 38188-1001

The NCSC works closely with the mailing industry, vendors and internal postal customers to improve address quality. The USPS headquarters office of Address Management also is located at the NCSC.

Numerous USPS publications, forms, brochures, etc. currently provide the existing address for the NCSC – all of which will need to be updated, including those on usps.com and other postal websites. Telephone numbers for all NCSC personnel and program support groups will remain the same.

1-800-238-3150