Article 930-2 of the French Civil Code
Renunciation has no effect if the renouncing party’s reserve estate has not been affected. If the hereditary reserve has only been partially infringed, the renunciation only produces effects up to the amount of the infringement of the renouncing party’s reserve resulting from the liberality granted. If the reserve is impaired to a greater extent than that provided for in the renunciation, the excess is subject to reduction. A renunciation relating…