Kernrechtsfrage
Whether the appeal is admissible despite failure to pay the required advance on costs within the set grace period.
Extrahierter Entscheid
The appeal is not entered upon because the appellant did not pay the advance on costs or provide proof of timely payment within the non-extendable period.
Extrahierte Begründung
After denial of legal aid for lack of prospects, the appellant was warned under Art. 62(3) BGG and given a final non-extendable deadline. Since no payment or proof of payment was submitted, non-entry follows under Art. 108(1)(a) BGG.