Kernrechtsfrage
Whether Y.'s federal appeal was admissible despite X. signing it first
Extrahierter Entscheid
Y. lacked standing to appeal because the cantonal appeal was filed only by X., and the federal appeal arguments concerned only X.
Extrahierte Begründung
The appellate decision showed that Y. was not the appellant in the cantonal proceedings; signing the federal brief later did not cure this.