Question juridique clé
Whether the complaint could be entertained despite non-payment of the court advance within the deadline and grace period.
Solution extraite
The complaint could not be entertained because the required advance was not paid within the deadline or the non-extendable grace period.
Motifs extraits
Under Art. 62 BGG, a party must pay an advance for expected court costs; if the advance is not paid within the grace period, the Federal Supreme Court must not enter into the matter. Service by uncollected registered mail counted as valid service under Art. 44(2) BGG.