Kernrechtsfrage
Whether the appeal must be declared inadmissible because the advance on costs was not paid within the supplementary deadline.
Extrahierter Entscheid
Yes. The appeal had to be declared inadmissible.
Extrahierte Begründung
The appellant did not pay the required advance within the extended time limit; under the simplified procedure, the appeal is therefore inadmissible pursuant to Art. 62(3) LTF, as referred to by Art. 108(1)(a) and (2) LTF.