Key legal question
Whether the appeal could be entered into despite non-payment of the court advance within the deadline.
Extracted holding
No. The appeal could not be considered because the required advance payment was not made in time and no valid proof of timely payment was provided.
Extracted reasoning
After a warning under Art. 62(3) BGG, the appellant neither paid the advance nor complied with the payment-proof requirement. Under Art. 108(1)(a) BGG, the consequence is non-entry.