Questione giuridica chiave
Whether the federal appeal could challenge the first-instance judgment of the District Court of Kreuzlingen directly.
Decisione estratta
No. The district court decision was not a final cantonal decision subject to federal appeal.
Motivazione estratta
Only the cantonal appellate decision was challenged before the Federal Supreme Court; the first-instance ruling was not a last-instance judgment under Art. 75(1) BGG.