Question juridique clé
Whether the appeal could be entered into despite non-payment of the required advance on costs.
Solution extraite
The appeal could not be entertained because the advance on costs was not paid within the original deadline or the subsequent grace period.
Motifs extraits
The advance-cost order and the grace-period order were deemed served under Art. 44(2) BGG. Non-payment triggered non-entry under Art. 62(3) BGG.