Questione giuridica chiave
Whether the social insurance appeal was admissible despite non-payment of the ordered advance on costs.
Decisione estratta
The appeal was inadmissible because the appellant failed to pay the required advance within the initial and additional deadlines.
Motivazione estratta
Under Art. 62 LTF, the court may require an advance of costs and must set an additional deadline if payment is not made; failure to pay within that second deadline makes the appeal inadmissible.