Questione giuridica chiave
Whether the appeal had to be entered upon after the advance costs were not paid within the extended time limit.
Decisione estratta
The appeal was not entered upon because the advance costs were not paid even during the grace period.
Motivazione estratta
Under Art. 62(3) BGG, failure to pay the requested advance costs within the set additional deadline leads to non-entry in simplified proceedings under Art. 108(1)(a) BGG.