Question juridique clé
Whether the appeal had to be entered into despite non-payment of the cost advance within the deadline
Solution extraite
The appeal could not be heard because the appellant failed to pay the required advance even during the grace period.
Motifs extraits
Under Art. 62(3) BGG, failure to pay the cost advance within the additional period leads to non-entry in simplified proceedings under Art. 108(1)(a) BGG.