Questione giuridica chiave
Whether the alleged transfer of the leased property during the appeal allowed a new party to join the federal appeal.
Decisione estratta
No new party could be added; only parties from the cantonal proceedings may appear, and the later transfer did not alter appellate standing.
Motivazione estratta
A party change before the Federal Supreme Court is generally excluded without consent, and the post-judgment sale of the property did not affect the tenant's appeal interest or justify intervention.