Kernrechtsfrage
Whether the appeal had to be declared inadmissible because the advance on costs was not paid within the extended deadline.
Extrahierter Entscheid
Yes. Since the appellant did not pay the advance on costs within the final non-extendable deadline, the appeal was inadmissible.
Extrahierte Begründung
The court noted non-compliance with the advance-payment order and applied the sanction of inadmissibility under the Federal Supreme Court Act, using the simplified procedure.