What does Missouri call proof of service?
Signed return or affidavit
Document Guides
Missouri Rule 54.20 proof of service
Place of service changes the officer's proof. Do not describe every Missouri return as notarized, and do not describe the out-of-state officer affidavit as a bare signature.
iRemoteNotary Editorial Team
Published and reviewed by iRemoteNotary
Last reviewed October 7, 2026
Quick Answer
What proof does Missouri use, and does it explicitly require a notary?
Signed return or affidavit. Place of service changes the officer's proof. Do not describe every Missouri return as notarized, and do not describe the out-of-state officer affidavit as a bare signature.
Do not assume a notary is required from the document title. Send the unsigned page if the signature block is unclear.
Proof at a glance
| Question | This jurisdiction |
|---|---|
| Proof name | Signed return or affidavit |
| Private server | In-state affidavit; oath officer not named |
| Officer | In-state signature; out-of-state sworn affidavit |
| Traditional notary explicit? | Yes for the out-of-state officer affidavit |
| Perjury alternative? | No |
| Recipient acceptance of remote notarization | No express recipient-acceptance source was identified in the official materials reviewed. |
Current controlling rule
Missouri proof is controlled, for this guide, by Mo. R. Civ. P. 54.20. Place of service changes the officer's proof. Do not describe every Missouri return as notarized, and do not describe the out-of-state officer affidavit as a bare signature.
No single effective date is stored beyond the source that was reviewed on October 7, 2026.
What this jurisdiction calls the proof
The opened materials call it: Signed return or affidavit. Classification used in the authority record: mixed by server type.
Private process server
A non-officer inside Missouri makes an affidavit. The inside-state sentence does not name the oath officer. A court-appointed person files an affidavit of time, place, and manner.
Sheriff, officer, or other listed server
Inside Missouri, an officer signs a written return. Outside Missouri, the officer's affidavit is made before the clerk or judge of the officer's court or another person authorized to administer oaths in that state.
Is an oath or notary explicitly required?
The answer depends on the form or the server. Read the signature block on the page that will be filed.
No penalty-of-perjury alternative was identified for this proof path.
Official sources do not use one signing method
The in-state return and the out-of-state officer affidavit use different proof language. The direct rule HTML page was not opened.
Fields the server has to complete
- Time, place, and manner for a court-appointed server
When a different kind of process uses different proof
out of state: The outside-state form has a subscribed-and-sworn block. The Rule 54.20 HTML page was not opened directly. The sentences used here match the courts.mo.gov extract and that form.
Limit of the source
Rule HTML page was indirect. Do not treat a secondary mirror as a newer amendment.
Remote online notarization and court acceptance
No express recipient-acceptance source was identified in the official materials reviewed.
Remote online notarization is performed under the law of the online notary's commissioning state. When the commission is a Florida commission, Florida's remote online notarization statute governs the notarial act. The court or other recipient still decides whether to accept the return.
If the page is only a declaration, certificate, or signed return, do not add a notary certificate.
Send the unsigned proof
Not sure whether your exact proof or return requires a notarial act? Send the unsigned document for review before scheduling.
What to send iRemoteNotary
- The unsigned proof, return, or affidavit
- The court, and that the case is connected to Missouri
- The form number and revision if one is printed
- Whether the signature block is a jurat or a perjury declaration
Send the unsigned proof
Not sure whether your exact proof or return requires a notarial act? Send the unsigned document for review before scheduling.
Process-serving companies and law firms
A coordinator can submit the request. The signer is the person named on the certificate. There is no organization account, dashboard, volume price, or court-filing service.
One signer and one notarization is $25 domestically. Each additional notarization is $15. An additional signer is $10. A witness is $15. An international session coordination fee of $25 applies when a signer is outside the United States. An international session commonly starts at $50 for one signer and one notarization.
Send the unsigned proof
Not sure whether your exact proof or return requires a notarial act? Send the unsigned document for review before scheduling.
Frequently asked questions
Does a sheriff or officer use the same signature block?
Inside Missouri, an officer signs a written return. Outside Missouri, the officer's affidavit is made before the clerk or judge of the officer's court or another person authorized to administer oaths in that state.
Is a penalty-of-perjury declaration an alternative?
No alternative of that kind was identified for this proof path.
Did the official materials expressly accept remote notarization of the proof?
No express recipient-acceptance source was identified in the official materials reviewed.
Related pages
Sources and Official References
The following primary sources support the legal and procedural information in this guide. Requirements can change, so confirm current rules with the receiving organization before relying on a notarized document.
Missouri clerk handbook extract of Rule 54.20(opens in a new tab)
Missouri
Accessed October 7, 2026
Send the unsigned page
Not sure whether your exact proof or return requires a notarial act? Send the unsigned document for review before scheduling.