Article 713-33 of the French Code of Criminal Procedure
Where the person against whom the order has been issued is able to show that the confiscation has been enforced, in whole or in part, in another State, the Public Prosecutor shall consult the competent authority of the issuing State by any appropriate means. Any part of the amount recovered pursuant to the confiscation order in another State shall be deducted in full from the amount to be recovered.