Questione giuridica chiave
Whether new facts about rent arrears could be raised before the Federal Supreme Court.
Decisione estratta
The new allegation was inadmissible because it had not been raised in the cantonal appeal and no reason was shown why it could not have been raised there.
Motivazione estratta
New facts are admissible only if there was no opportunity to present them in the cantonal proceedings; this was neither shown nor apparent.