Key legal question
Whether the constitutional complaint could be entered into despite non-payment of the advance costs within the final deadline.
Extracted holding
No. Because the advance costs were neither paid in cash nor properly credited and documented within the non-extendable deadline, the complaint could not be considered.
Extracted reasoning
After a warning under Art. 62(3) BGG, the appellant still failed to comply with the advance-cost order. The prerequisites for non-entry were therefore met under the cited procedural provisions.