Questione giuridica chiave
Whether the federal appeal was admissible despite non-payment of the advance on costs within the set deadline.
Decisione estratta
The appeal was inadmissible because the appellant neither paid the advance on time nor produced a timely bank or postal debit attestation.
Motivazione estratta
Under Art. 62 al. 3 LTF, failure to pay the requested advance within the final deadline leads to inadmissibility; the appellant also failed to satisfy Art. 48 al. 4 LTF by providing proof of timely debit.