Kernrechtsfrage
Whether the appeal had to be entered into despite the missing cost advance
Extrahierter Entscheid
No. Because the appellant neither paid the advance nor proved timely payment, the court refused to hear the appeal.
Extrahierte Begründung
After the deadline and grace period expired without payment or proof of payment, Art. 62(3) BGG required non-entry under Art. 108(1)(a) BGG.