Wis. Stat. § 801.04: Jurisdictional requirements for judgments against persons, status and things.

(1) Jurisdiction of subject matter required for all civil actions. A court of this state may entertain a civil action only when the court has power to hear the kind of action brought. The power of the court to hear the kind of action brought is called “jurisdiction of the subject matter”. Jurisdiction of the subject matter is conferred by the constitution and statutes of this state and by statutes of the United States; it cannot be conferred by consent of the parties. Except as provided in s. 813.015, nothing in chs. 801 to 847 affects the subject matter jurisdiction of any court of this state.

(2) Personal jurisdiction. A court of this state having jurisdiction of the subject matter may render a judgment against a party personally only if there exists one or more of the jurisdictional grounds set forth in s. 801.05 or 801.06 and in addition either:

(a) A summons is served upon the person pursuant to s. 801.11; or

(b) Service of a summons is dispensed with under the conditions in s. 801.06.

(3) Jurisdiction in rem or quasi in rem. A court of this state having jurisdiction of the subject matter may render a judgment in rem or quasi in rem upon a status or upon a property or other thing pursuant to s. 801.07 and the judgment in such action may affect the interests in the status, property or thing of all persons served pursuant to s. 801.12 with a summons and complaint or notice of object of action as the case requires.