Virtual Mailbox & Form 1583 Rules in Wisconsin
A commercial mailbox rental (CMRA) or private mailbox (PMB) in Wisconsin cannot serve as your LLC's registered agent address, though it may generally be used as a business address subject to verification with the Secretary of State. When opening a virtual mailbox with the USPS, you must complete a PS Form 1583, which typically requires notarization or witnessing by the mailbox provider owner. Wisconsin permits remote online notarization (RON) under permanent authority established by Act 125, effective 2020, meaning you can have the 1583 notarized online by an in-state notary rather than appearing in person.
Because notarization requirements and accepted alternatives can vary depending on the mailbox provider and USPS processing, you should confirm current requirements on the official Wisconsin Secretary of State website and with your chosen mailbox provider before proceeding. This overview is informational only and does not constitute legal advice. State regulations governing virtual mailboxes and notarization methods change periodically.
How a virtual mailbox works
A virtual mailbox is a real street address at a commercial mail-receiving agency (CMRA) that scans your mail; opening one means filing USPS PS Form 1583, witnessed by a notary or the provider, with two IDs.
| Detail | As the rule stands |
|---|---|
| Can a virtual mailbox be your registered agent? | No (a PMB cannot be your registered agent) |
| Can it be your LLC business address? | Generally yes — verify |
| Online notarization (RON) for Form 1583 | Online notarization (RON) available |
| Form 1583 witnessing | Notary or CMRA-owner witness (in person or by A/V) |
| PMB designator (address line) | 'PMB <number>' or '# <number>' (USPS DMM 508.1.4) |
| Governing citation | Wis. Stat. §140.145 et seq.; USPS DMM 508.1.8 |
Opening any virtual mailbox means filing USPS PS Form 1583. The form must be witnessed — by a notary or by the mailbox provider (the CMRA owner/manager), in person or by real-time audio-video under the 2024 CMRA Clarification rule — and you supply two acceptable IDs. It is usually notarized, and the notarization can be done online via remote online notarization (RON) wherever the state allows it.
Confirm before you file. This is informational only, not legal advice. The official state Secretary of State / notary page and USPS are the authoritative sources.
Check your state's rule →Virtual address for an LLC in Wisconsin → · Choosing a provider →
Compiled from the USPS federal baseline (DMM 508 / 39 CFR) and the state notary/RON statute, and verified June 2026. Always confirm the current rule on the official state Secretary of State / notary page before you rely on it — RON law is still moving. This state's RON status is currently medium-confidence (the exact statute section is not yet pinned), so treat the online-notarization detail as a starting point and confirm it on the official page. How we compile this. Informational only, not legal advice.