Kernrechtsfrage
Whether the appeal could be entered into despite non-payment of the ordered cost advance within the extended deadline.
Extrahierter Entscheid
No; the appeal was not entered into because the advance was not paid even after the grace period expired.
Extrahierte Begründung
The advance-payment order and the subsequent grace-period order were deemed duly served; under Art. 62(3) BGG, failure to pay within the prescribed period leads to non-entry in simplified proceedings under Art. 108 BGG.