Title
Yap vs. Yap
Case
G.R. No. 222259
Decision Date
Oct 17, 2022
Lowella Yap claims inheritance as Diosdado Sr.'s nonmarital child; dispute over filiation and estate partition. Supreme Court remands for DNA testing, prioritizing child's welfare.

Case Summary (G.R. No. 222259)

Regional Trial Court Ruling

In 2012 the RTC found Lowella to be the decedent’s acknowledged nonmarital child based on her birth registration, a special power of attorney, letters signed by “Mama Mie,” photographs, and a sworn affidavit of the decedent. It dismissed intervenors for failure to prosecute and ordered estate partition among Lowella and the marital heirs.

Court of Appeals Reversal

The CA set aside the RTC’s recognition of Lowella as nonmarital child. Citing Family Code Article 164, it held Lowella presumed legitimate as her mother was married at her birth, and the legitimacy presumption may be impugned only by a direct action under Articles 170–171 by the husband (or heirs). The CA deemed the partition suit an improper collateral attack on legitimacy.

Presumption and Impugning of Legitimacy

Under Family Code Article 164, a child born in wedlock is presumed legitimate. Article 166 permits rebuttal only on narrow grounds (physical impossibility, scientific evidence, defect in artificial insemination). Articles 170–171 restrict who may file an impugnment action and the period for doing so. Jurisprudence (Tison; Liyao v. Tanhoti-Liyao) emphasizes that legitimacy cannot be collaterally attacked.

Best Interests of the Child and Statutory Purpose

Recent Supreme Court decisions (Santiago v. Jornacion) have tempered the rule against collateral attacks, emphasizing that the presumption of legitimacy is rebuttable and that children’s best interests—recognized under the United Nations Convention on the Rights of the Child—justify allowing direct filiation actions and scientific proof to establish true paternity where evidence warrants.

Physical Impossibility Ground

Family Code Article 166(1) allows impugning legitimacy when it was physically impossible for the husband to effect conception. Macadangdang v. CA clarifies that mere separation is insufficient; parties must demonstrate absolute impossibility of access. The RTC’s finding of a brief separation, based solely on petitioner’s testimony without proof of impossibility, amounted to speculation.

Need for Additional Evidence

Given the speculative nature of the RTC’s factual finding on separation and the absence of proof of impossibility of access, the Supreme Court remanded for further fact-finding. It instructed the RTC to receive additional evidence to determine whether the marital presumption may be successfully rebutted.

DNA Testing as Valid Scientific Proof

Family Code Article 166(2) allows rebuttal by biological or scie

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