Questão jurídica principal
Whether the federal appeal was admissible despite non-payment of the required advance on costs.
Decisão extraída
The appeal was inadmissible because the appellant did not pay the 2,000 CHF advance within the final non-extendable deadline.
Fundamentação extraída
Under Art. 62 LTF, failure to pay the advance within the additional deadline requires the appeal to be declared inadmissible.