Questione giuridica chiave
Whether the appeal must be declared inadmissible for failure to pay the required advance on costs within the extended deadline.
Decisione estratta
Yes. After the advance was not paid despite a supplementary deadline and warning, the appeal had to be declared inadmissible.
Motivazione estratta
Under Art. 62 paras. 1 and 3 LTF, the party bringing the case must advance the presumptive costs; if the required advance is not paid within the supplementary deadline after an initial non-payment, the appeal is inadmissible. The appellant did not comply with either request.