Article R1233-1 of the French Labour Code
An employee who wishes to know the criteria used to determine the order of redundancies shall send his request to the employer, in application of articles L. 1233-17 and L. 1233-43, by registered letter with acknowledgement of receipt or delivered against receipt, before the expiry of a period of ten days from the date on which he actually leaves his job. The employer shall make known the criteria it has…