Questione giuridica chiave
Whether the debtor could set off a claim regarding the daughter's housing-cost share against child maintenance debt.
Decisione estratta
No. Child maintenance belongs to the child; the debtor's alleged claim against the wife is against a different person, so mutuality required for set-off is lacking.
Motivazione estratta
Even the separately calculated housing-cost component remains child maintenance under Art. 289 para. 1 ZGB. Set-off under Art. 120 para. 1 OR requires reciprocal claims between the same persons, which was not the case here.