Kernrechtsfrage
Whether A.'s federal appeal was admissible despite failure to pay the required advance on costs.
Extrahierter Entscheid
A.'s appeal could not be examined because he did not pay the requested advance within the deadline after warning.
Extrahierte Begründung
Under Art. 62(3) LTF, non-payment of the advance on costs after express warning leads to inadmissibility.