Kernrechtsfrage
Whether the appeal should be entered despite non-payment of the court advance within the extended deadline.
Extrahierter Entscheid
No. Because the appellant did not pay the advance even within the grace period, the court must not enter into the appeal.
Extrahierte Begründung
Under Art. 62(3) BGG, failure to pay the requested advance after an additional deadline leads to non-entry in simplified proceedings under Art. 108(1)(a) BGG.