G.R. No. 190810 ; July 18, 2012
LORENZA C. ONGCO, PETITIONER, vs. VALERIANA UNGCO DALISAY, RESPONDENT.

FACTS

Respondent Valeriana Ungco Dalisay filed an Application for Land Registration for Lot 1792 before the Municipal Trial Court (MTC) of Binangonan. No private oppositor appeared, leading to an Order of General Default against the whole world except the Republic of the Philippines. The MTC granted the application and ordered the issuance of a decree of registration. The Republic appealed the decision to the Court of Appeals (CA). While the appeal was pending, petitioner Lorenza C. Ongco, who had not participated in the trial court proceedings, filed a Motion for Leave to Intervene with an attached Answer-in-Intervention. She claimed a legal interest, alleging she was in actual possession of the land based on a prior Department of Environment and Natural Resources (DENR) proceeding concerning a free patent application.
Respondent Dalisay opposed the motion, arguing intervention was untimely under Section 2, Rule 19 of the Rules of Court, which requires filing before the trial court renders judgment. She also contended intervention would delay the appeal and petitioner’s interests could be protected in a separate proceeding. The Republic interposed no objection to the intervention.

ISSUE

Whether the Court of Appeals committed reversible error in denying petitioner’s Motion for Leave to Intervene filed during the pendency of the appeal.

RULING

The Supreme Court denied the petition and affirmed the CA Resolutions. Intervention is not a right but a privilege granted by the court, governed by Rule 19 of the Rules of Court. Section 2 explicitly states that a motion to intervene may be filed “at any time before the rendition of judgment by the trial court.” The Court emphasized that this period is restrictive and mandatory. Since the MTC had already rendered its judgment on October 15, 2008, and petitioner filed her motion only on June 23, 2009, during the appeal stage, the intervention was unquestionably filed out of time.
The legal logic is anchored on the nature of intervention as an ancillary and supplemental remedy, not an independent action. Its purpose is to settle all related controversies in a single proceeding to prevent multiplicity of suits. However, this objective must yield to the overriding principle of orderly procedure and the prevention of undue delay. Allowing intervention after trial judgment, especially on appeal, would undermine the finality of the trial court’s proceedings, reopen factual issues, and prejudice the original parties. The Court found no compelling reason to justify an exception, noting that petitioner’s alleged interest, even if proven, is not a legal interest in the property required for intervention in a land registration case, where the State is the sole indispensable party opposing the application. Petitioner is not without recourse; she may avail herself of a separate petition for review of the decree under Section 32 of P.D. No. 1529 on the ground of actual fraud, should a decree be issued.