Question juridique clé
Whether the appeal had to be entered into despite non-payment of the court cost advance within the extended deadline.
Solution extraite
No. Because the appellant did not pay the advance even within the supplementary deadline, the court could not enter into the appeal.
Motifs extraits
Under Art. 62 BGG, the court may require an advance payment and set a grace period; if it remains unpaid, non-entry follows in simplified proceedings under Art. 108 BGG.