Questione giuridica chiave
Whether the Federal Court appeal met the reasoning requirements of Art. 42 BGG
Decisione estratta
The appeal did not engage with the decisive reasoning of the cantonal judgment and therefore lacked a sufficient substantiated argument.
Motivazione estratta
The appellant merely repeated his own view about service of the cost-advance order and did not address the cantonal court's core findings on service presumption and the absence of proof of representation for the appeal stage.