Question juridique clé
Whether the Federal Supreme Court could enter into the civil complaint despite non-payment of the cost advance within the extended time limit.
Solution extraite
The complaint could not be heard because the appellant failed to pay the required cost advance even within the grace period.
Motifs extraits
Under Art. 62 para. 3 BGG and the procedure of Art. 108 para. 1 lit. a BGG, non-payment of the ordered advance costs within the extended deadline leads to non-entry.