United States v. Munsingwear, Inc.
Facts
The United States sued Munsingwear on one count for an injunction and on another for treble damages, alleging violations of a regulation fixing maximum prices. By agreement and pretrial order, the treble-damages count and another similar treble-damages suit were held in abeyance pending final determination of the injunction suit. The district court held that respondent's prices complied with the regulation and dismissed the injunction complaint. While the government's appeal from that judgment was pending, the commodity was decontrolled, the appeal was dismissed as moot, and respondent then successfully argued that the unreversed injunction judgment was res judicata of the treble-damages actions.
Issue
Whether a district court judgment in an injunction suit, left unmodified after the appeal was dismissed as moot, could be given res judicata effect in later treble-damages actions between the same parties on the same pricing issue. More specifically, the question was whether mootness on appeal and the resulting lack of appellate review created an exception to ordinary preclusion principles.
Rule
A judgment that directly determines a right, question, or fact in a suit between the same parties is conclusive in a later suit on a different claim so long as the first judgment remains unmodified. In federal civil cases that become moot on appeal, the established appellate practice is to vacate or reverse the judgment below and remand with directions to dismiss, which clears the path for future relitigation and prevents the unreviewable judgment from spawning legal consequences; a party who fails to seek that relief cannot later avoid the preclusive effect of the standing judgment.
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