Question juridique clé
Whether the appeal had to be entered into despite non-payment of the advance costs within the set deadline.
Solution extraite
No. Because the appellant did not pay the advance costs even within the extended deadline, the Federal Supreme Court could not consider the appeal.
Motifs extraits
Under Art. 62 para. 3 BGG, failure to pay the requested advance costs within the deadline permits non-entry; the later submission did not cure the default.