Title
Mercado vs. Manzano
Case
G.R. No. 135083
Decision Date
May 26, 1999
A 1998 election case where Eduardo Manzano, a dual citizen, was initially disqualified but later declared eligible by COMELEC, upheld by the Supreme Court, clarifying dual citizenship vs. allegiance.

Case Digest (G.R. No. 192760)

Facts:

  • Election and initial vote count
    • In the May 11, 1998 Makati vice-mayoral race, candidates were Eduardo B. Manzano (103,853 votes), Ernesto S. Mercado (100,894 votes), and Gabriel V. Daza III (54,275 votes).
    • Mercado trailed Manzano by 2,959 votes; Manzano’s proclamation was suspended due to a disqualification petition.
  • COMELEC disqualification proceedings
    • Ernesto Mamaril filed a petition before the COMELEC Second Division, alleging Manzano’s dual citizenship under Section 40(d) of the Local Government Code.
    • On May 7, 1998, the Second Division canceled Manzano’s certificate of candidacy; Manzano’s motion for reconsideration remained pending through the election.
  • COMELEC en banc resolution and certiorari petition
    • On August 31, 1998, the COMELEC en banc (4–1, 1 abstention) reversed the Second Division, ruled Manzano qualified, and directed his proclamation.
    • Mercado filed a petition for certiorari in the Supreme Court to annul the en banc resolution and declare Manzano disqualified.

Issues:

  • Whether Mercado had legal personality (locus standi) to file certiorari despite not being an original party in the disqualification proceedings.
  • Whether Manzano’s dual citizenship constituted “dual allegiance” disqualifying him under Section 40(d), Local Government Code.
  • Whether Manzano effectively renounced U.S. citizenship—by voting in Philippine elections and via his Certificate of Candidacy oath—thus terminating his dual-citizenship status.

Ruling:

  • (Subscriber-Only)

Ratio:

  • (Subscriber-Only)

Doctrine:

  • (Subscriber-Only)

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