801.04.Jurisdictional requirements for judgments against persons, status and things.

Section 801.04 sets out the jurisdictional foundation the rest of chapter 801 builds on. First, a Wisconsin court can only hear a civil action if it has subject matter jurisdiction — the power to hear that kind of case at all. That power comes only from the state and federal constitutions and statutes; the parties cannot create it by agreeing to it, and nothing in chapters 801 to 847 changes a court’s subject matter jurisdiction (except as a separate statute on forfeiture actions provides).

Second, even with subject matter jurisdiction established, a court can only enter a judgment against a party personally if two things are both true: a jurisdictional ground exists under the sections that follow, and either a summons was served on that person or service was dispensed with under the conditions the next section allows. Third, when a court is asserting jurisdiction in rem or quasi in rem — over a status, property, or thing rather than a person directly — it may render that kind of judgment, and the judgment can affect the interests of anyone who was properly served with the summons and complaint or notice of the object of the action.

Read together, these three tiers describe a layered structure: subject matter jurisdiction is the threshold that must exist for any case, personal jurisdiction is what lets a judgment bind an individual party, and in rem or quasi in rem jurisdiction is a separate track for cases about a thing or status rather than a person’s liability.