Questione giuridica chiave
Whether the appeal was admissible despite non-payment of the required advance on court costs.
Decisione estratta
The appeal was inadmissible because the appellant did not pay the required advance within the original or extended deadline.
Motivazione estratta
Under Art. 62 paras. 1 and 3 LTF, failure to pay the requested advance after a warned additional time limit leads to inadmissibility; the appeal was manifestly inadmissible under Art. 108 para. 1 lit. a LTF.