Forged Signatures and Good Faith: Protecting Property Rights in Philippine Law

The Supreme Court’s 2003 decision in Potenciano v. Reynoso (G.R. No. 140707) is a clear reminder that a forged deed transfers no rights, and that buyers of real property must exercise genuine diligence—not blind trust—before parting with their money. The case weaves together three enduring principles of Philippine property law: forgery voids a sale, a buyer in bad faith gets no protection from the Torrens system, and even unprobated wills can prove filiation.

The Facts

In 1961, Felipe Pareja was convicted of murder and sentenced to life imprisonment. He received a conditional pardon in 1971. In October 1979, Pareja allegedly executed a Deed of Absolute Sale over a Cebu City lot in favor of his illegitimate son, Manuel Jayme. Ten days later, Jayme and his wife sold the same property to Norgene Potenciano.

After Pareja died in 1981, his other illegitimate children—the Reynoso siblings—discovered the sales and sued. They claimed their father’s signature on the deeds was forged, and that Pareja was still under civil interdiction at the time. The trial court and the Court of Appeals both ruled for the Reynosos, and Potenciano and the Jaymes appealed to the Supreme Court.

The Issue

The central question was whether the deeds of sale were valid. If Pareja’s signature was forged, then no ownership ever passed to the Jaymes—and the Jaymes could not have sold anything to Potenciano. The Court also had to decide whether Potenciano was a buyer in good faith who deserved the protection of the Torrens title system.

The Ruling: Forgery Voids the Sale

The Supreme Court affirmed the lower courts’ finding that Pareja’s signatures were forged. Although the deeds were notarized and thus carried a presumption of regularity, the Court held that this presumption is not absolute. It can be rebutted by clear and convincing evidence.

Here, an NBI handwriting expert testified to “fundamental divergencies” between the questioned signatures and Pareja’s genuine specimens. The Court of Appeals also conducted its own independent visual comparison and found the differences “readily noticeable upon inspection.” The notary public’s contrary testimony was weakened by the fact that he was Potenciano’s former counsel—an interested party—and by admissions that Pareja had actually signed one deed at his own residence, not before the notary.

Because the signature was forged, the deed was void. Under the principle that no one can give what one does not have, the Jaymes acquired nothing from Pareja and therefore could transfer nothing to Potenciano.

Buyer in Good Faith: Diligence Required

The Court then rejected Potenciano’s claim that he was an innocent purchaser for value. The burden of proving good faith lies on the buyer, and it is not enough to invoke the ordinary presumption of good faith.

The record showed that Potenciano never saw any certificate of title before buying. He relied only on three deeds of sale, never verified ownership with the Register of Deeds, and did not even check who was in possession of the property—even though it was occupied by the Reynoso family at the time. He admitted he simply trusted a facilitator to handle “everything.”

The Court stressed a settled rule: a buyer of real property that is in the possession of someone other than the seller must investigate the occupant’s rights. A buyer who fails to do so cannot claim good faith. Consequently, Potenciano could not invoke the indefeasibility of his Torrens title, because the law does not protect a transferee who takes title with notice of a flaw. As the Court put it, the law cannot be used as a shield for fraud.

Proving Filiation Without Probate

The Court also addressed the respondents’ standing to sue. The petitioners argued that an unprobated will could not prove filiation. The Court disagreed, citing Articles 172 and 175 of the Family Code. Filiation may be established by an admission in a public document or authentic writing. A will—even if not yet probated—qualifies as such a writing for purposes of proving filiation, because probate only determines the will’s extrinsic validity, not the truth of its contents.

Additionally, Manuel Jayme had executed a joint affidavit with Dwight Reynoso admitting they were both recognized illegitimate children of Pareja. Under Article 1431 of the Civil Code, an admission is conclusive against the person making it. Since Potenciano derived his alleged rights from Jayme, he was bound by Jayme’s admission.

Practical Takeaways

• A forged signature makes a deed void from the start. No ownership passes, and no subsequent buyer can acquire valid title from the forged chain.
• Notarization is not a magic shield. While notarized documents enjoy a presumption of regularity, this can be rebutted by expert testimony, eyewitness accounts, and the court’s own examination.
• Good faith requires action, not trust. Before buying real property, verify the certificate of title with the Register of Deeds, inspect the property, and investigate anyone in possession who is not the seller.
• The Torrens title protects only innocent buyers. A buyer in bad faith cannot hide behind the indefeasibility of a certificate of title.
• Filiation can be proven without a probated will. A will or other authentic writing acknowledging a child may suffice under the Family Code.

This article is general information and not legal advice. For your specific situation, consult a lawyer or ask ASG Legal AI.