Kernrechtsfrage
Whether the appeal could proceed despite non-payment of the advance costs within the set deadline.
Extrahierter Entscheid
No entry could be made on the appeal because the advance costs were not paid in time and no valid proof of payment was provided.
Extrahierte Begründung
After the warning under Art. 62(3) BGG and the non-extendable grace period, the appellant neither paid in cash nor produced the required debit confirmation for a payment order.