Kernrechtsfrage
Whether the appeal could proceed despite non-payment of the required advance on costs within the extended deadline.
Extrahierter Entscheid
No. Because the appellant failed to pay the advance even within the grace period, the court could not enter into the appeal.
Extrahierte Begründung
Under Art. 62(3) BGG, failure to pay the requested advance after the additional deadline leads to non-entry; the simplified procedure under Art. 108(1)(a) and (2) BGG applied.