Rules of civil procedure and service of process requirements for Wisconsin.
Last updated October 22, 2026
Wisconsin's rules for serving a summons are in the Wisconsin Statutes, chapter 801, mainly sections 801.02, 801.10 and 801.11. Subpoenas are covered by sections 805.07 and 885.03.
Wisconsin doesn't license process servers. Any adult resident of the state where service is made who isn't a party can serve, and adults from Illinois, Iowa, Michigan and Minnesota can also serve in Wisconsin (§ 801.10).
Disclaimer: Laws change, and this page is a plain-language summary, not legal advice. Check the current statutes on the Wisconsin State Legislature site or ask an attorney before relying on it.
Wisconsin process servers
Process-serving software: ServeManager
ServeManager is process-serving software used by agencies across Wisconsin. It tracks every attempt with date, time, GPS and photos, and generates affidavits of service from the job, so your record of diligence is ready if service is challenged.
No. Wisconsin has no state license, registration or bond for process servers. Under § 801.10(1), an authenticated copy of the summons can be served by any adult resident of the state where service is made who isn't a party to the case. Service must be made with reasonable diligence.
Residency matters. For service inside Wisconsin, the server must live in Wisconsin, Illinois, Iowa, Michigan or Minnesota (§ 801.10(1m), added by 2005 Wisconsin Act 439). Courts have treated service by a server who doesn't meet the residency rule as a fundamental defect that requires dismissal.
For a step-by-step guide, see Become a Process Server in Wisconsin.
An authenticated copy of the summons and complaint must be served within 90 days after filing (§ 801.02).
The server hands the summons to the defendant. This can be done in Wisconsin or outside the state (§ 801.11).
If the defendant can't be served personally with reasonable diligence, the server can leave a copy at the defendant's usual place of abode with:
The server must tell the person what the papers are. Service can also follow the substituted-service law of the state where service is made. Courts look closely at diligence: two visits with no other effort to find the defendant has been held not enough.
If the defendant can't be served personally or at home with reasonable diligence, the summons can be published as a class 3 notice under chapter 985. If the defendant's mailing address is known or can be found, a copy of the summons and complaint must also be mailed to them at or before the first publication. See What is service by publication?
The summons can be served in a way another statute allows, or on an agent authorized by appointment or by law to accept service for the defendant.
Look up registered agents with the Wisconsin Department of Financial Institutions corporate records search.
Subpoenas are issued and served under chapter 885, and an attorney of record can issue a subpoena in a civil case (§ 805.07). Any person can serve a subpoena by showing and reading it to the witness, giving the witness a copy, or leaving a copy at the witness's home (§ 885.03).
In most civil cases, a witness doesn't have to attend unless witness fees for one day's attendance and travel are paid or tendered (§ 885.06).
At the time of service, the server signs the summons and writes on it the time, date, place and manner of service and who was served. A server who doesn't make this endorsement can't collect a fee, though the service is still valid (§ 801.10(2)).
The server then delivers proof of service to the plaintiff, who files it promptly (§ 801.10(3)).
If the defendant challenges service, it's proved by the server's affidavit. The affidavit states the time, date, place and manner of service, that the server is an adult resident of a qualifying state and not a party, and that the server knew the person served was the defendant. For substituted service, it must also say where and with whom the papers were left, and the facts showing reasonable diligence (§ 801.10(4)). Courts require strict compliance when service is challenged.
Find process servers and agencies across the state in the Wisconsin process server directory.
This page is a general overview of Wisconsin law, not legal advice. Laws change. Check the current statutes or talk to an attorney about your case.
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