Questione giuridica chiave
Whether the federal appeal was admissible despite non-payment of the advance on costs.
Decisione estratta
No. Because the advance on costs was not paid within the extended deadline, the appeal had to be declared inadmissible.
Motivazione estratta
The advance was neither paid nor credited, and no corresponding debit confirmation was received; under the LTF, failure to pay the advance within time leads to inadmissibility.