USPS

CMRA

PS Form 1583

Compliance

USPS Compliance Knowledge Base for CMRA Operators

Everything your team needs to stay audit-ready: CMRA registration, Form 1583 workflows, ID verification, CRD recordkeeping, and PMB addressing standards.

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Knowledge base topics

Use this page as your operator playbook. Each section highlights a USPS requirement with practical guidance for CMRAs and mailroom teams.

CMRA definition & scope Registering your CMRA USPS Form 1583 workflow Identity verification rules CRD + recordkeeping PMB addressing standards Termination & remail Audit readiness checklist FAQs Sources Compliance deep dives

Compliance disclaimer

This knowledge base provides operational guidance only and is not legal advice. Always confirm USPS, state, and local requirements with counsel.

Innbocks provides software that supports USPS CMRA compliance workflows, including Form 1583 collection, e-notarization, and CRD task tracking. Innbocks is not affiliated with the U.S. Postal Service and does not provide legal advice. The operator of each CMRA remains responsible for satisfying USPS requirements, including those in Domestic Mail Manual 508.1.8. Always verify current rules against official USPS sources.

Last updated: February 8, 2026

Core USPS compliance requirements at a glance

Register your CMRA

Complete USPS Form 1583-A, keep it on file, and coordinate with your local Post Office before accepting mail.

•Provide the CMRA owner/manager identification
•Keep the signed form available for inspection
•Do not alter USPS forms

Collect USPS Form 1583 for every customer

Each addressee must have a valid USPS Form 1583 on file before you deliver mail.

•Separate form for each customer
•Signatures must be witnessed (in-person or live video)
•Reject incomplete or mismatched forms

Verify ID consistently

USPS requires primary and secondary identification for CMRA addressees.

•IDs must be current and traceable to the applicant
•Record ID type and number in USPS Form 1583
•Maintain a repeatable ID review process

Maintain CRD + records

Upload USPS Form 1583 data and ID images into the CMRA Customer Registration Database (CRD).

•Keep digital copies of USPS Form 1583
•Update closures and forwarding addresses
•Certify records quarterly

Use compliant PMB addressing

Private Mailbox addresses must include PMB or # and follow USPS formatting rules.

•Avoid combining suite/unit designators with PMB
•Ensure all customer addresses use the same format
•Communicate correct format to customers

CMRA definition & scope

USPS defines a Commercial Mail Receiving Agency (CMRA) as a private business that receives U.S. Mail for multiple customers at a single delivery point. This includes office business centers and reshipping/redelivery services. If you accept mail on behalf of multiple addressees, you are expected to follow CMRA rules.

Registering your CMRA

Before you accept mail for customers, your CMRA must completeUSPS form 1583-A and coordinate with your local Post Office. The Postmaster (or designee) verifies the CMRA information, signs the form, and keeps it on file. USPS forms cannot be modified.

FileUSPS form 1583-A with your Post Office
Provide the CMRA owner/manager identification
Keep the signed form available for inspection

PS Form 1583 workflow

Each mailbox customer (addressee) must completeUSPS form 1583 before you deliver mail. USPS requires the form to be signed in the physical or virtual real-time audio/video presence of a CMRA representative or commissioned notary.

Collect a separate Form 1583 for every addressee
Verify IDs and record them in the form
Reject forms with mismatched or incomplete information
Store a digital copy and update it when customer info changes

Identity verification rules

USPS requires CMRA customers to present one primary and one secondary form of identification. Both IDs must be current and traceable to the applicant. Record the ID type and number in Form 1583.

Category	Examples (not exhaustive)
Primary ID	U.S. government photo ID (driver’s license, state ID, CAC, uniformed service ID, USCIS card, citizenship/naturalization certificate, tribal ID, USAccess/PIV) U.S. or foreign passport Matricula Consular (Mexico) NEXUS card (Canada) U.S. university ID U.S. corporate ID
Secondary ID	Another acceptable primary ID Lease, mortgage, or deed of trust Voter or vehicle registration Home or vehicle insurance policy Form I-94
Unacceptable ID	Social Security cards Birth certificates Credit cards Similar documents that are not official ID

CRD + recordkeeping

USPS requires CMRAs to enter Form 1583 data and upload ID images into the CMRA Customer Registration Database (CRD). You must maintain a digital record of Form 1583 and certify quarterly that records are current, closures are recorded, and IDs are unexpired.

Upload ID images to CRD (image retention is not required after upload)
Record termination dates and any remailing/forwarding address
Retain Form 1583 for at least six months after termination
Respond to USPS compliance deficiencies within 30 days

PMB addressing standards

All CMRA customer addresses must use the same private mailbox format. USPS requires the CMRA address to include “PMB” or “#”. Do not combine suite/unit designators with PMB formatting.

Compliant format

100 Main St PMB 123
Anytown, ST 12345

Non-compliant format

100 Main St Ste 123 PMB 123
Anytown, ST 12345

Termination & remail obligations

When a customer ends service, USPS requires CMRAs to record the termination date, retain Form 1583, and remail or return items for six months. USPS does not permit CMRAs to file a change-of-address order on behalf of the customer.

Retain Form 1583 for at least six months after termination
Remail or return items with the proper USPS endorsement
Notify USPS when a PMB is closed

Audit readiness checklist

Use this internal checklist to prepare for USPS reviews and maintain consistent compliance across your team.

Standardize Form 1583 intake and ID review workflows
Document staff permissions for mail handling and records
Review CRD entries and quarterly certification dates
Train teams on address formatting and mail release rules
Run periodic internal audits using the tools below

FAQs

Who counts as a CMRA under USPS rules?

A CMRA is a private business that receives U.S. Mail for multiple customers at a single delivery point, including office business centers and reshipping/redelivery services.

Do I need a separate USPS Form 1583 for each customer?

Yes. USPS requires USPS Form 1583 for each addressee. Even spouses with the same PMB need separate forms; minors can be listed by a parent or guardian.

Can USPS Form 1583 be signed remotely?

Yes. Signatures can be confirmed in the physical or virtual real-time audio/video presence of an authorized CMRA representative or a commissioned notary.

What identification is required for CMRA customers?

USPS requires one acceptable primary ID and one acceptable secondary ID, both current and traceable to the applicant.

What is the CMRA Customer Registration Database (CRD)?

USPS requires CMRAs to enter Form 1583 data and upload ID images into the CRD, maintain digital records, and certify accuracy quarterly.

What happens when a mailbox customer terminates?

Record the termination date, retain Form 1583 for at least six months, and remail or return mail per USPS guidance without filing a change-of-address order.