Questione giuridica chiave
Whether the appellants had standing to file the federal appeal
Decisione estratta
Yes. The mother had participated in the cantonal proceedings, and the adult children could appeal because the maintenance claims concerned them directly and they had joined the lower-court submissions.
Motivazione estratta
Participation under Art. 76 aLTF does not require formal party status; direct interest sufficed for the mother and, for the adult children, direct opposition to the maintenance judgment and their consent to the claims made them parties for appeal purposes.