Question juridique clé
Whether the appeal had to be admitted despite the unpaid advance on costs
Solution extraite
The court could not enter into the appeal because the advance remained unpaid even within the extended deadline.
Motifs extraits
Under Art. 62(3) BGG, failure to pay the required advance within the set time limit, including the grace period, leads to non-entry in simplified proceedings under Art. 108(1)(a) and (2) BGG.