Question juridique clé
Whether the appeal had to be entered into despite the unpaid advance on costs.
Solution extraite
No. Because the appellant neither paid the advance within the grace period nor proved timely payment, the appeal could not be entertained.
Motifs extraits
After the warning in the order of 2010-09-21, the conditions for non-entry under Art. 62(3) BGG and summary procedure under Art. 108(1)(a) BGG were met.