Kernrechtsfrage
Whether the appeal could be considered despite non-payment of the advance on costs.
Extrahierter Entscheid
No. Because the advance was not paid within the non-extendable grace period, the appeal had to be declared inadmissible under the summary procedure.
Extrahierte Begründung
The court had ordered an advance, repeated the instruction with legal warning, granted the statutory final grace period, and the appellant still did not pay; therefore non-entry followed under Art. 108 BGG.