Question juridique clé
Whether declaring the cantonal appeal inadmissible for late payment of the advance on costs constituted excessive formalism under Article 9 of the Constitution.
Solution extraite
No. The cantonal court could insist on timely payment and treat non-payment within the warned deadline as inadmissibility without violating Article 9.
Motifs extraits
The warning was clear, the notification to counsel was valid, and the sanction mirrored federal procedural rules. The appellant had options to request an extension or legal aid before the deadline, and the reasons for the late payment did not amount to a non-fault excuse.