USPS Form 1583 Explained

USPS Form 1583 (Application for Delivery of Mail Through Agent) is the identity and authorization paperwork commonly associated with receiving mail through a commercial mail receiving agency (CMRA). This guide summarizes why it exists and what applicants typically prepare—not how to submit it through this website.

Why the form exists

CMRAs accept mail on behalf of many unrelated customers. USPS rules require agents to know who is behind each box and to keep authorization records. The form documents that you authorize a private agent to receive mail addressed to you.

Information commonly requested

  • Applicant name and contact details
  • The private mailbox or address designation in use
  • Identification types acceptable under current USPS CMRA guidance
  • Business entity details when mail is for a company
  • Notarization or in-person verification steps when required by the agent’s process

Notary and identity checks

Some enrollment flows require a notary acknowledgment or an agent-witnessed ID check. Requirements change; always follow the instructions on the current official form and your chosen CMRA’s checklist. For general notary context, see notary public basics.

Virtual mailbox enrollments

Digital mailbox brands that use CMRA addresses generally still rely on Form 1583 (or successor processes USPS recognizes). Remote notarization or partnered ID verification may be offered by some providers—confirm legality in your jurisdiction.

Practical tips

Use consistent legal names across IDs and business registrations. Ask how long records are retained. If you cancel a box, ask how residual mail is handled. Do not email sensitive ID scans to informal addresses; use the provider’s secured channel.

Official forms and instructions belong to USPS. Download them only from usps.com or your provider’s directed official source.

Capital Postal Mailbox does not process Form 1583 or CMRA applications.

Business vs personal applicants

If mail will arrive in a trade name, providers usually need entity documents that match the form. Mismatched LLCs, DBAs, and personal names are a frequent cause of rejection. Bring formation papers and photo ID for each person listed as an addressee when the CMRA requires it.

Keeping the authorization current

Update the agent when your ID expires, your company officers change, or you add recipients. Out-of-date 1583 files can interrupt delivery. Ask whether the CMRA stores paper, digital scans, or both, and how they protect those records.

Remote notarization caveats

Some states allow remote online notarization for parts of the enrollment flow; others require in-person appearance. The CMRA—not this website—must tell you which workflow they accept. Never mail original ID cards.

Authoritative sources

Verify current rules and product details on official sites:

Capital Postal Mailbox publishes educational guides only and does not fulfill retail postal or shipping services.