Questione giuridica chiave
Whether the federal appeal should be entered into despite non-payment of the cost advance.
Decisione estratta
No entry could be made because the appellant neither paid the advance within the deadline nor provided the required proof of timely payment.
Motivazione estratta
After a reminder under Art. 62(3) BGG and warning of non-entry, the advance remained unpaid and no valid proof of payment by bank/post transfer was submitted; therefore non-entry followed under Art. 108(1)(a) BGG.