If you receive mail on behalf of virtual office clients, you are operating as a Commercial Mail Receiving Agency (CMRA). That designation comes with a specific federal requirement: every client who uses your address to receive mail must have a completed PS Form 1583 on file before their mail delivery begins.
This guide explains what Form 1583 requires, what your ongoing obligations are as a CMRA, and how Alliance's Verified system handles the processing so your team does not have to manage it manually.
PS Form 1583, formally titled "Application for Delivery of Mail Through Agent," is a USPS form that authorizes a CMRA to receive mail on behalf of an individual or business.
The form exists to prevent anonymous mail reception. USPS requires that anyone using a commercial address for mail delivery be identifiable and on record. The CMRA accepting their mail takes legal responsibility for collecting and maintaining that documentation.
Every virtual office client at your center needs one on file — and it must have been properly processed before their mail service begins. There is no grace period under USPS regulations.
A properly completed PS Form 1583 requires:
Two forms of valid identification. USPS specifies a list of acceptable ID types, which includes passports, driver's licenses, state-issued IDs, military IDs, and several others. At least one must contain a photo. Both must be current and legible.
Notarization. The form must be signed in the presence of a notary public, who certifies that the person completing the form is who they say they are. The notarized signature and notary seal must both appear on the completed form.
Accurate address information. The form must reflect the specific address where mail will be delivered, which is your center's address. If a client moves to a different location or changes their listed entity, a new form is required.
Submission to the USPS Customer Registration Database (CRD). USPS maintains a centralized database of all PS Form 1583 records. As a CMRA, you are required to enter each client's information into the CRD and upload legible copies of their ID documents. The database is how USPS audits CMRA compliance.
The Form 1583 requirement is not a one-time task at client enrollment. It carries ongoing administrative obligations.
Quarterly certification. CMRAs are required to certify in the USPS CRD on a quarterly schedule that all PS Form 1583 records are current, all termination dates have been updated for clients who have left, and no ID documents have expired. Certification deadlines fall on January 15, April 15, July 15, and October 15 each year.
Missing a certification deadline puts your CMRA registration at risk. USPS has increased enforcement activity around CMRA compliance over the past several years, and the consequences of non-compliance can include suspension of your CMRA authorization — which affects every virtual office client at your center.
ID expiration monitoring. If a client's ID document on file expires, the 1583 record becomes non-compliant. Tracking expiration dates across a growing client roster is an operational task that tends to fall through the cracks without a dedicated system.
Client terminations. When a virtual office client cancels, their termination date must be updated in the CRD. Failing to close out records for departed clients creates ongoing compliance liability.
Some centers handle Form 1583 processing entirely in-house: collecting forms from clients, verifying IDs, coordinating notarization, entering records into the CRD, and managing the quarterly certification cycle.
This is operationally feasible at small volume. A center with 10 or 15 virtual office clients might manage it reasonably well with a dedicated staff member and a spreadsheet.
As the client roster grows, the process becomes harder to manage consistently. The ID verification step requires staff who understand what valid documentation looks like and how to identify discrepancies. Notarization coordination adds friction to the client onboarding experience, particularly for clients who are enrolling remotely and cannot come in person. CRD data entry is time-consuming and detail-dependent. And the quarterly certification requires a systematic review of every record, not a spot check.
Centers that have transitioned from manual processing to a streamlined system typically describe the change in similar terms: less staff time spent on paperwork, fewer compliance gaps, and a faster client activation experience.
For Alliance center partners, Form 1583 processing is managed through Verified, Alliance's client compliance platform.
When a new client enrolls through Alliance:
Online ID verification. The client completes identity verification online before their service activates. Alliance manages the verification process, including document upload and review.
Free online notarization. Alliance provides access to online notarization services at no cost to the client. Most clients complete the notarization step the same day they enroll, without needing to visit a physical notary or your center.
CRD data management. Alliance submits the completed 1583 records to the USPS CRD on the client's behalf. Your center does not need to manage CRD data entry for Alliance-enrolled clients.
Quarterly certification support. Alliance handles the quarterly certification process for records it manages, reducing the scope of what your team needs to certify independently.
The result is that your center's compliance exposure from Alliance-enrolled clients is lower than it would be under a manual processing model — and the client experience is meaningfully faster. Clients who previously had to coordinate notarization in person or find their own notary service often activate the same day through the online process.
Verified handles the 1583 process for Alliance-enrolled clients. But your center retains responsibility for:
Clients you enrolled outside Alliance. Any virtual office client you signed up directly — not through the Alliance platform — has their own 1583 requirement that you manage. If you have a mix of Alliance-enrolled and direct clients, make sure your internal tracking covers the direct client records separately.
Quarterly certification for your direct clients. The January, April, July, and October certification deadlines apply to your entire CMRA registration, not just Alliance clients. You will need to certify your direct client records through your own CRD access on schedule.
ID document expiration for non-Alliance clients. Monitor your direct clients' ID expiration dates and prompt them for updated documents before records become non-compliant.
Record retention. USPS requires CMRAs to retain 1583 records securely. This applies to both current and former clients. Your center's record-keeping policy should address how long records are retained after a client terminates.
One of the most common compliance gaps happens at enrollment: a client starts receiving mail before their 1583 is fully processed. This often happens because the compliance requirement gets treated as an administrative afterthought rather than an activation prerequisite.
Under USPS regulations, mail delivery for a virtual office client should not begin until the Form 1583 is complete and on file. Establishing a clear activation workflow — where the 1583 completion is a required step before the client's address goes live — protects your center and keeps your CMRA registration in good standing.
If you are reviewing your current enrollment process and want to ensure the compliance step is properly gated, Alliance's Partner Success team can walk through how Verified fits into your center's workflow.
For more on the broader CMRA compliance picture, see CMRA Compliance for Coworking Centers: Everything You Need to Know and How to Become a CMRA: A Step-by-Step Guide.