Kernrechtsfrage
Whether the Federal Court appeal is admissible despite non-payment of the required advance of costs.
Extrahierter Entscheid
The appeal is inadmissible because the appellant did not pay the advance of costs within the additional deadline and did not provide timely proof of payment.
Extrahierte Begründung
Under Art. 62 al. 3 LTF, failure to pay the advance within the final additional deadline results in inadmissibility; the defect was manifest, so simplified proceedings were used under Art. 108 al. 1 let. a LTF.