Questione giuridica chiave
Whether the appeal had to be declared inadmissible because the advance on costs was not paid within the extended time limit.
Decisione estratta
Yes. Because the appellant failed to pay the advance on costs within the additional deadline, the appeal was inadmissible under Art. 62(3) LTF.
Motivazione estratta
Non-payment after a duly warned extension triggers inadmissibility; the defect was manifest, allowing summary disposal.