Kernrechtsfrage
Whether the appeal could be entered into despite non-payment of the requested court advance.
Extrahierter Entscheid
No. The court had to refuse entry because the advance was not paid within the original or extended deadline after express warning.
Extrahierte Begründung
Under Art. 62(1) and (3) BGG, the party must pay an advance for expected court costs; if payment is not made even after a grace period with a non-entry warning, the appeal must not be heard.