Question juridique clé
Whether the maintenance judgment was a valid title for definitive debt enforcement despite an open credit for prior payments.
Solution extraite
Because the judgment left open which earlier payments had to be credited, it did not establish a clear duty to pay a determinate amount for the retroactive maintenance periods.
Motifs extraits
Definitive enforcement requires a judgment ordering payment of a specific sum. If prior payments are expressly reserved for deduction, the payable amount cannot be determined from the title alone; the enforcement judge may not resolve that ambiguity materially.