Article R3252-28 of the French Labour Code
If the employer fails to make payments in execution of a seizure, the judge shall issue an order declaring him personally indebted in accordance with article L. 3252-10. The employer is notified of the order. The court clerk informs the creditor and the debtor. If no objection is lodged within fifteen days of notification, the order becomes enforceable. Enforcement is pursued at the request of the most diligent party.