Kernrechtsfrage
Whether the Federal Supreme Court could enter into the appeal despite non-payment of the required advance costs.
Extrahierter Entscheid
No; the appeal had to be declared inadmissible because the appellant did not pay the advance costs within the extended deadline and did not seek legal aid.
Extrahierte Begründung
The court held that a party must ensure receipt of judicial mail. The registered/court service notice was deemed served at the latest on the last day of the seven-day collection period. Since the advance costs remained unpaid after the grace period, Art. 62 para. 3 BGG required non-entry under Art. 108 para. 1 lit. a BGG.