Questione giuridica chiave
Whether the appeal had to be declared inadmissible for non-payment of the required advance on costs.
Decisione estratta
Yes. After the initial request and a supplementary deadline, the appellant still failed to pay, so the appeal was manifestly inadmissible.
Motivazione estratta
Under Art. 62 para. 1 and 3 LTF, a party must advance the estimated costs; failure to do so within the additional deadline renders the appeal inadmissible. The court therefore applied Art. 108 para. 1 let. a LTF.