Kernrechtsfrage
Whether the social-insurance appeal was admissible after the appellant failed to pay the advance of costs within the extended deadline.
Extrahierter Entscheid
The appeal was inadmissible because the advance of costs was not paid in time.
Extrahierte Begründung
After the refusal of legal aid and a further deadline warning of inadmissibility, the appellant still did not pay the required advance; therefore the appeal had to be declared inadmissible under the Federal Supreme Court Act.