Preterition in partition of estate

As to the party or parties to the deed who are allegedly not actually heirs,
Article 1105 is in point; it provides: "A partition which includes a person
believed to be an heir, but who is not, shall be void only with respect to
such person." In other words, the participation of non-heirs does not render
the partition void in its entirety but only to the extent corresponding to
them. (G.R. No. 128102, March 7, 2000)
Article 1103 provides for an analogous rule for omission of objects or
securities in the inheritance. "The omission of one or more objects or
securities of the inheritance shall not cause the rescission of the
partition on the ground of lesion, but the partition shall be completed by
the distribution of the objects or securities which have been omitted."
(Civil Code)