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Frequently Asked Questions - the FAQs

What documents do I need to begin Mailbox Rentals?

Whether you're signing up for a virtual or physical private mailbox, you need to provide Three (3) documents:

  1. A completed and notarized USPS form 1583
  2. A photo ID
  3. An Address ID

The original completed and notarized USPS 1583 will be kept by the Mailbox provider, while copies of your Photo ID and Address ID will be made so the originals remain with you.

Why do I need to complete USPS form 1583?

The form is a federal requirement of USPS. As the government postal service agency, USPS requires you to complete an authorization form that grants us permission to act as your postal agent, receiving mail on your behalf. Without a completed and notarized form, the accompanying documentation and current information, Mailbox Express is not authorized to receive mail on your behalf. That means we cannot rent you a mailbox. 

What forms of ID can I use?

USPS has strict requirements about the forms they will accept. Additionally, a renter cannot use the same document for both types of ID. (for Example, while your StateID is listed under both ID Types, it cannot be used for both as a second document must be produced and copied. 

USPS Approved Photo IDs include
  • U.S. State/Territory/Tribal Driver's or Non-Driver's ID Card
  • Uniformed Service ID
  • U.S. Access Card
  • U.S. University ID Card
  • Passport (form does not specify US)
  • Matricula Consular
  • NEXUS Card
  • Certificate of Naturalization
  • U.S. Permanent Resident Card
Address ID
  • U.S. State/Territory/Tribal Driver's or Non-Driver's ID Card
  • Current Lease
  • Mortgage or Deed of Trust
  • Home or Vehicle Insurance Policy
  • Vehicle Registration Card
  • Voter Card

Can I rent a mailbox for my business? 

Depending on the plan that you select, yes you can register a business. However, for each business you wish to associate with a business, you'll need to complete the 1583 form, provide individual identification for one person as the renter and point of contact for the business, as well as state registration documentation that validates that the business exists, indicating the legal name and the DBA (if applicable).

The rental plan will determine both the number of businesses and persons that can receive mail at the address.

How do I address mail to mailbox? 

All tenants of the location will need to use one of the following formats for the address, to ensure mail can be correctly delivered/received at our location. 

RentingBusinessName
ATTN: FirstName LastName,
330 SW 43rd St
K XXX
Renton WA 98057

Deceased FirstName LastName
C/O ReneterFirstName LastName,
330 SW 43rd St
K XXX
Renton WA 98057

FirstName LastName,
330 SW 43rd St
K XXX
Renton WA 98057

What happens to mail addressed to a mailbox but not registered to the account? 

If a person or business has not been registered to receive mail at our location, the mail will be returned to sender on receipt and verification that the person is not registered. To be considered registered, we must have a completed, signed and notarized USPS form 1583, with supporting identification and business registration documents. 

It is the renter's responsibility to comply with this requirement, to avoid disruption of service and misplaced mail. While we will offer one-time verification of intent to receive mail at this address, not completing and providing the required documents within 5 business days of accommodation , or not adhering to the limits of rental plan and rental agreements will result in future mail to that recipient being rejected. Our agency must be authorized to receive mail on someone's behalf. Our only exception is for package receipt, for which fees apply. 

Is my information shared with anyone? 

Mailbox Express views your information as critically confidential. 

This means that only the USPS will receive a copy of the submitted authorization and identification. We will not share or sell your information with any other party. The only exception to this rule is that law enforcement agencies may produce a subpoena, as part of an investigation, requiring us to provide records of a specific renter, including: the form 1583, copies of your ID, and your package receipt and pick-up logs.

What happens when my information changes? 

We (both you and Mailbox Express) are required by the USPS to maintain current records. This means that if your records have expired, or if you change address or contact information, you are required to notify us to update our records. 

To update records, you have two options: 

  1. You can visit in-person, or 
  2. Submit updated records and information via service ticket or email us at support@mbexp.com. 

Failing to update your records on time will lead to mutually undesirable cancellation of rental.

Are there any additional fees? 












We provide a full 7 business days of complimentary storage for your items. If you’re unable to stop by within that timeframe, we apply a daily storage fee (Monday–Saturday) to help manage our floor space. However, we understand that life happens, and if you have vacation plans or emergent situations, we waive the fees when notified in advance.  

The Storage Fee structure is very clear and specific, to provide the best transparency and visibility to our customers.


Overweight Surcharge - Items over 50 lbs incur a one-time surcharge ($10–$25) for handling services.

Oversize surcharge - Extremely large items (over 108" total) are billed at rate of $25 per business day (+ overweight surcharge, if applicable).