Key legal question
Whether the complaint was admissible despite non-payment of the court-ordered advance on costs within the non-extendable deadline.
Extracted holding
The complaint was not admitted because the appellant neither paid the advance nor proved timely payment by debit confirmation.
Extracted reasoning
After unsuccessful expiry of the deadline under Art. 62(3) BGG, non-entry had to follow under Art. 108(1)(a) BGG.