Question juridique clé
Whether the debtor could set off the child-maintenance claim against an alleged housing-cost claim against the mother
Solution extraite
No. The maintenance claim belongs to the child, while any housing-cost claim would run against the mother; the required mutuality for set-off was missing.
Motifs extraits
Under Art. 289 ZGB the child is the creditor of maintenance, including the housing-cost component. Set-off under Art. 120 OR requires reciprocal claims between the same persons, which was absent here.