Key legal question
Whether the appeal could be entered into despite non-payment of the required court advance.
Extracted holding
No. After the ordered advance and the extended deadline were both ignored, the court had to decline to enter into the appeal.
Extracted reasoning
Under Art. 62 BGG the appellant must pay an advance for likely court costs. The warning that failure to comply would lead to non-entry was given, and the advance was not paid within either deadline, so Art. 62(3) sentence 3 BGG and Art. 108(1)(a) BGG required non-entry.