Key legal question
Whether the appeal can be entered into despite non-payment of the court cost advance within the deadline.
Extracted holding
No. Because the advance was neither paid nor properly proven within the granted grace period, the court refused to hear the appeal.
Extracted reasoning
Under Art. 62(3) BGG, failure to pay the requested advance of costs after warning leads to non-entry; the same follows here under Art. 108(1)(a) BGG.