Kernrechtsfrage
Whether the complaint had to be considered despite the unpaid court cost advance.
Extrahierter Entscheid
The complaint could not be entered into because the appellant did not pay the court cost advance within the non-extendable deadline and did not provide proof of timely payment.
Extrahierte Begründung
After a warning under Art. 62(3) BGG and the expiry of the additional deadline, neither cash payment, postal delivery, nor the required payment confirmation was submitted; non-entry followed under Art. 108(1)(a) BGG.