Service of process in Missouri
In Missouri, civil process within the state is served by the sheriff or by any non-party who is at least 18 years old, and the court may specially appoint a person to serve; service by mail with an acknowledgment and, where authorized, service by publication are also permitted. The person serving must make a prompt return; if process is not served, the return is generally due within 30 days of issuance and may be extended up to 90 days by the court. Missouri has not adopted the UIDDA.
ProcessServerState provides procedural-information-only summaries of state process-server rules. This is not legal advice. Service of process is a critical step in litigation — if you fail to serve correctly, your case can be dismissed. For complex or contested matters, consult a licensed attorney or a court self-help center. Not affiliated with any court or sheriff's office.
Is a license required in Missouri?
No statewide license. Server must be 18+ and not a party; some circuits (e.g., City of St. Louis) require local appointment/training, and special appointment by the court may be needed.
Who may serve process in Missouri?
- County sheriff
- Any non-party adult (18+)
- Certified / registered mail
- Publication (by court order)
Service deadline (Missouri)
No hard service cutoff, but the return is due within 30 days of issuance, extendable up to 90 days by court order (Mo. R. Civ. P. 54.21); unserved process may be returned for an alias summons. This is a return-of-process timeframe, not an absolute service bar.
UIDDA: Missouri has not adopted the UIDDA; out-of-state subpoenas follow a non-UIDDA process.
Sheriff / Marshal civil-process route
Civil-process fees are set by each county and listed on the local sheriff's civil-process page. Not all counties publish a fee schedule — confirm with the county where service will be made.
Statute / Rule citation
Mo. R. Civ. P. 54 (esp. 54.13 service within the state)
Verification notes for Missouri: the following could not be fully primary-source-confirmed in our last pass and should be verified against the cited source before you rely on them:
- rule4Url (Missouri courts handbook portal; exact Rule 54 deep link approximate — content cross-checked via ServeNow)
Interstate service from Missouri
Missouri has not adopted the UIDDA. Out-of-state subpoenas are domesticated through a non-UIDDA process, and service of an initial summons across state lines follows the receiving state's rules.
Sources for Missouri
Other states with no license requirement
Check a different state
Verified against Missouri primary sources on June 16, 2026. Read how we verify on our methodology page, or browse every citation in the source manifest.
Editorial review status: Reviewer attribution pending — we are recruiting a credentialed reviewer (ex-process-server with a NAPPS credential, or a NALA/NFPA-certified civil-procedure paralegal) before this site applies for advertising. We will not display a fabricated reviewer.
ProcessServerState provides procedural-information-only summaries of state process-server rules. This is not legal advice. Service of process is a critical step in litigation — if you fail to serve correctly, your case can be dismissed. For complex or contested matters, consult a licensed attorney or a court self-help center. Not affiliated with any court or sheriff's office.