①The assumption of rights by succession, regardless of whether it is by division of the estate, may not be asserted against a third party with respect to the portion exceeding the share of the estate calculated pursuant to the provisions of the following Article and Article 901, unless registration, recording or any other requirement for perfection has been satisfied.

②If, in the case where the right referred to in the preceding paragraph is a claim, a coheir who has assumed the claim in excess of the share of the estate calculated pursuant to the provisions of the following Article and Article 901 notifies the obligor of the assumption, making clear the content of the will relating to the claim (or, if the claim was assumed by division of the estate, the content of the division of the estate relating to the claim), the provisions of that paragraph apply on the deeming that all of the coheirs have given notice to the obligor.