Article R1238-2 of the French Labour Code
Any collective redundancy for economic reasons of less than ten employees within the same thirty-day period without informing the administrative authority of the redundancy or redundancies decided upon, in disregard of the provisions of article L. 1233-19 or without including in this information the information provided for in article D. 1233-3, is punishable by the fine laid down for fourth-class offences.