Questione giuridica chiave
Whether the cantonal court committed excessive formalism by declaring the appeal inadmissible for non-payment of the cost advance.
Decisione estratta
No excessive formalism was found because the appellant had been properly notified of the amount, deadline, and consequences, and her lawyer's omission is attributable to her.
Motivazione estratta
Strict enforcement of an advance-payment requirement is permissible when the party is duly informed; negligence by counsel is borne by the represented party.