Whether a judgment in a representative or class suit may, consistently with due process, bind persons who were not formally named or served as parties.
Holding
Yes, but only when the procedure fairly protects the absent persons’ interests, ordinarily because they were adequately represented by parties with the same interests.
Reasoning
The ordinary rule is that a person is not bound by an in personam judgment in litigation to which that person was neither made a party nor subjected to service of process. Enforcing such a judgment against an absent person ordinarily violates the notice-and-opportunity-to-be-heard requirements of due process.
Equity nevertheless developed representative litigation because joining every interested person can be impracticable. A class judgment may bind absentees when parties before the court adequately represent them, when absentees actually participate in the litigation, or when a legal relationship—such as a joint interest—entitles the named parties to stand in judgment for others.
The Fourteenth Amendment does not compel states to use any particular version of class-action procedure. But when a state gives a prior judgment preclusive effect against an absent person, due process requires a procedure that fairly ensures protection of that person’s interests. A state court’s decision to call litigation a class suit does not itself resolve that constitutional question.