Article R522-14 of the French Code of civil enforcement procedures
The distraining creditor who arranges for the removal of the assets with a view to their forced sale shall inform, by registered letter with acknowledgement of receipt, the creditors who have made a protective attachment on the same assets prior to the act of attachment or the act of conversion, as the case may be. Under penalty of nullity, this letter shall indicate the name and address of the ministerial…