Questão jurídica principal
Whether the complaint could be entered into despite non-payment of the ordered cost advance.
Decisão extraída
No. Because the appellant did not pay the CHF 800 advance even within the additional deadline, the Federal Supreme Court could not enter into the complaint.
Fundamentação extraída
The advance-payment order was received, the subsequent deadline warning was sent, and the appellant had to expect judicial correspondence; the notice therefore counts as served. Since payment was not made in time, non-entry followed under Art. 108 BGG.