Kernrechtsfrage
Whether the Federal Supreme Court could examine the appellant's challenge to the landlord's standing and alleged lack of mandate for its property manager.
Extrahierter Entscheid
The complaint was inadmissible because it did not target the cantonal appellate judgment and relied on a new fact not shown to satisfy the requirements for new allegations.
Extrahierte Begründung
In federal appeal only the last cantonal instance can be challenged; new facts are admissible only under Art. 99(1) LTF, which was not met.