Questão jurídica principal
Whether the public-law appeal satisfied the constitutional pleading requirements and could be examined on the merits.
Decisão extraída
No. The appellant did not specifically and clearly challenge the cantonal court's decisive reasoning, so the appeal could not be examined.
Fundamentação extraída
In a public-law appeal, the Court reviews only expressly and properly substantiated constitutional grievances. The appellant merely opposed his own interpretation of Art. 289 CC and did not address the cantonal court's key ground: standing was assessed at the time the payment order was served, when the child was still minor and the arrears related to that period.