When a Final Nullity Ruling Defeats an Unlawful Detainer Claim

In an unlawful detainer case, the usual focus is on who has the better right to physical possession. But what happens when a separate court later declares the very document that gave the plaintiff that right to be void? The Supreme Court recently answered this in Samonte v. Domingo (G.R. No. 237720, February 5, 2020), ruling that a final and executory judgment nullifying a deed of sale can defeat an ejectment claim through the principle of res judicata.

The Dispute Over the Tondo Property

Demetria Domingo filed an unlawful detainer complaint against Alvin Samonte before the Metropolitan Trial Court (MeTC) of Manila. She claimed she bought Samonte's residential house in Tondo through a Deed of Sale executed on July 8, 2011, and that Samonte refused to vacate despite her demands.

Samonte countered that no sale took place. He alleged that he merely obtained a P59,000.00 loan from Domingo and signed what he believed was a contract of mortgage. He claimed Domingo defrauded him while he was in dire financial need.

The MeTC dismissed the complaint for lack of cause of action, but the Regional Trial Court (RTC) reversed, ordering Samonte to vacate. The Court of Appeals (CA) affirmed the RTC's ruling.

A Parallel Case Changes Everything

While the unlawful detainer case was pending appeal, Samonte filed a separate action for annulment of deed of sale and damages before the RTC of Manila, Branch 32. In that case, the RTC declared the Deed of Sale null and void, finding that the transaction was actually an equitable mortgage to secure Samonte's debt. The CA affirmed this ruling, and it became final and executory on September 15, 2017.

Samonte then asked the CA to reconsider its ruling in the unlawful detainer case, citing this supervening event. The CA denied his motion, prompting Samonte to elevate the matter to the Supreme Court.

The Issue: Can a Voided Deed Still Support Possession?

The central question was whether Domingo still had the right to possess the property when the deed she relied upon had been declared null and void in a separate, final case.

The Supreme Court ruled in Samonte's favor. While ejectment cases generally proceed independently of suits to annul a deed of sale, the Court emphasized that the CA's decision nullifying the deed had already become final and executory. This triggered the doctrine of res judicata.

Res Judicata in the Concept of Conclusiveness of Judgment

The Court explained that res judicata precludes parties from re-litigating issues already determined by a prior final judgment. Section 47 of Rule 39 of the Rules of Court governs this principle.

There are two concepts of res judicata: bar by prior judgment (identity of parties, subject matter, and causes of action) and conclusiveness of judgment (identity of parties but different causes of action). The latter applied here.

Both cases involved the same parties and the same property, but different causes of action — one for possession, the other for the validity of the deed. Since the deed's nullity was already settled with finality, Domingo could no longer claim any right to possess the property based on that deed.

Ownership Rulings in Ejectment Cases Are Provisional

The Court clarified that in unlawful detainer cases, courts may examine ownership only to determine who has the better right of possession. Such rulings on ownership are merely provisional and do not bar a separate action regarding title.

However, once a final judgment in a separate case declares the deed void, that determination becomes conclusive. The Court cited Vios v. Pantango, Jr. to underscore that final judgments are immutable and may no longer be modified.

Practical Takeaways

• A final judgment nullifying a deed of sale can defeat an unlawful detainer claim based on that deed, even if the ejectment case was decided first.
• Res judicata in the concept of conclusiveness of judgment applies when the same parties litigate different causes of action but share a common issue that was already finally resolved.
• Ownership rulings in ejectment cases are only provisional. They settle possession for the moment but do not bind a later action on title.
• Parties should monitor related cases. A supervening final judgment in a separate action can be a ground to seek reconsideration in a pending ejectment case.
• The timing of finality matters. The nullity ruling must have become final and executory for res judicata to apply.

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