Title
Municipality of Payao, Zamboanga Sibugay vs. Municipality of Imelda, Zamboanga Sibugay
Case
G.R. No. 243167
Decision Date
Jun 28, 2021
Jurisdictional dispute over Barangay Guintolan between Payao and Imelda; SC ruled mandamus valid, Imelda entitled to supervisory authority under P.D. 1239.
boundary dispute
res judicata
supervisory authority
A

Case Summary (G.R. No. 243167)

Factual Background

Barangay Guintolan lay contiguous to the adjacent Municipalities of Payao and Imelda, both created by P.D. No. 1238 and P.D. No. 1239 respectively. In 1987 the Sangguniang Panlalawigan of Zamboanga del Sur adopted resolutions approving the transfer of Barangay Guintolan from Payao to Imelda, prompting litigation. A long-standing territorial and jurisdictional dispute followed, complicated by inconsistent reproductions of the municipal charters and by changes in provincial organization culminating in the creation of Zamboanga Sibugay by Republic Act No. 8973.

Petition for Declaratory Relief (RTC‑Pagadian, Branch 19)

The Municipality of Payao filed a Petition for Declaratory Relief and nullification of Sangguniang Panlalawigan Resolution No. 166, Series of 1987. The RTC‑Pagadian, Branch 19 rendered a Decision dated November 18, 1987 declaring Resolution No. 166 null and void and holding that alteration of municipal boundaries could be effected only by the national legislature.

First Mandamus Case (RTC‑Pagadian, Branch 21)

In 2001 the Municipality of Imelda filed an earlier Petition for mandamus before the RTC‑Pagadian, Branch 21 to compel recognition of its authority over Barangay Guintolan. The RTC‑Pagadian, Branch 21 dismissed that petition by Order dated August 15, 2001, concluding that municipal charters, as then certified to the court, supported Payao’s territorial claim.

Proceedings before the Sangguniang Panlalawigan and Second Mandamus Filing

Before bringing the second mandamus action, the Municipality of Imelda sought administrative remedies. Its Sangguniang Bayan passed a resolution in 2006 requesting transfer of Barangay Guintolan. The provincial officials gave conflicting advice; the Provincial Legal Office later determined the controversy concerned the proper station of the barangay and advised judicial action. Consequently, on August 22, 2011, Imelda filed a second Petition for mandamus in Branch 24 of the Regional Trial Court of Ipil, Zamboanga Sibugay, docketed as Special Civil Action No. I‑115.

Trial Court Ruling (RTC‑Imelda, Branch 31)

The RTC‑Imelda granted the Petition for mandamus in a Decision dated April 1, 2015, decreeing that Barangay Guintolan was under the jurisdiction of Imelda, ordering Payao to cease and desist from exercising jurisdiction or control, and directing Payao to peacefully turn over control and supervision. The RTC relied on the text of P.D. No. 1239 and a DENR base map showing Guintolan within Imelda, and found that erroneous charter copies submitted by Payao had contributed to prior confusion.

Court of Appeals Decision

The Municipality of Payao appealed. The Court of Appeals in CA‑G.R. SP No. 07137‑MIN affirmed the RTC‑Imelda Decision in its February 28, 2018 Decision and denied reconsideration in its September 21, 2018 Resolution. The Court of Appeals found the requisites for mandamus satisfied and held that res judicata did not apply because the prior proceedings involved different subject matter and because earlier rulings had relied on erroneous charter copies.

Issues Presented to the Supreme Court

The Supreme Court framed two issues: (1) whether mandamus was an appropriate remedy for Imelda to obtain jurisdiction over Barangay Guintolan to the exclusion of Payao; and (2) whether the second Petition for mandamus was barred by res judicata.

Parties’ Contentions Before the Supreme Court

The Municipality of Payao contended that mandamus was an improper remedy and that the Petition was barred by res judicata. The Municipality of Imelda argued that mandamus was proper because it had been unlawfully excluded from exercising supervisory authority over Barangay Guintolan, and that res judicata did not apply because newly discovered and accurate evidence contradicted the bases of earlier rulings.

Supreme Court Ruling and Disposition

The Supreme Court denied the petition for review and affirmed with modification the Court of Appeals' decision and resolution. The Court held that the Municipality of Imelda properly resorted to mandamus and that res judicata did not bar the filed petition. The Court ordered the Municipality of Payao, its agents, and persons acting under its authority to desist from acts that prevent Imelda from exercising supervisory authority over Barangay Guintolan.

Legal Reasoning on Mandamus as a Remedy

The Court reiterated that the writ of mandamus has two variations under Rule 65, Section 3: to compel performance of a clear legal duty, and to rectify unlawful exclusion from a right or office. The Court emphasized that, for mandamus against unlawful exclusion, the petitioner must show a well‑defined, clear, and certain entitlement to a right or office, unlawful exclusion by the respondent, and absence of another plain, speedy, and adequate remedy. The Court reviewed prior jurisprudence, including Lagrimas v. Judge Zurbano, Garces v. Court of Appeals, and University of San Agustin, Inc. v. Court of Appeals, to illustrate the distinction between cases where mandamus would lie and where quo warranto or other remedies were appropriate.

Application to the Present Case

Applying these requisites, the Court found that P.D. No. 1239 explicitly enumerated Barangay Guintolan among Imelda’s constituent units and that the corresponding provision of P.D. No. 1238 did not include Guintolan among Payao’s barangays. The Court observed that municipal supervisory powers are entrenched in the 1987 Constitution, Art. X, Sec. 4, and in Republic Act No. 7160, which together recognize municipal supervision over component barangays. The Court concluded that Payao’s persistent exercise of authority unlawfully excluded Imelda from supervising Guintolan and that no other plain, speedy, or adequate remedy remained given the administrative avenues previously pursued and the erroneous disposition of the first mandamus petition.

Distinction from Quo Warranto and Scope of Relief

The Court clarified the difference between mandamus and quo warranto. It explained that quo warranto seeks the ouster of an usurper and the entry of the person entitled to the office, and may be brought by the Solicitor General or the person entitled to the office. By contrast, mandamus restores a petitioner to a right or office and is addressed to the party unlawfully excluding the petitioner. The Court observed that the present controversy concerned supervisory prerogatives and not a trial of disputed titles, rendering mandamus the appropriate remedy. The Court also corrected the RTC‑Imelda’s sweeping directive to relinquish control and to turn over supervision, noting that the proper relief concerned supervision rather than an undefined transfer of control.

Res Judicata Analysis

The Court applied the fourfold test for res judicata and found it inapplicable. The earlier RTC‑Pagadia

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