Question juridique clé
Whether the appeal must be entered into despite non-payment of the court advance.
Solution extraite
No. Because the appellant did not pay the advance or prove timely payment, the appeal could not be considered.
Motifs extraits
After a warning and a non-extendable grace period under Art. 62(3) BGG, failure to comply triggers non-entry under Art. 108(1)(a) BGG.