Key legal question
Whether the complaint could be heard despite the appellant's failure to pay the cost advance within the non-extendable deadline.
Extracted holding
The complaint could not be entered into because the required cost advance was not paid and no proof of timely payment by account debit was provided.
Extracted reasoning
After a warning under Art. 62(3) BGG, the appellant neither paid the advance in cash nor submitted the required debit confirmation within the deadline; therefore non-entry followed under Art. 108(1)(a) BGG.