In the case provided for in Article L. 1251-52, the employee or the social security body or social institution, or, in the event of safeguard, receivership or compulsory liquidation proceedings, the court-appointed agent or liquidator shall inform the user undertaking of the inadequacy of the security by sending it a request for payment of the outstanding sums by registered letter with acknowledgement of receipt or delivered against receipt.
The user company shall pay the sums due within ten days of receipt of the request.