G.R. No. 199612 - Federico vs. Commission on Elections

In the May 10, 2010 elections for Mayor of Sto. Tomas, Batangas, private respondent Osmundo M. Maligaya (Liberal Party) and Edna Sanchez (wife of the late Governor Armando Sanchez) were official candidates.
On April 27, 2010, Governor Armando Sanchez died. On April 29, 2010, Edna withdrew her Certificate of Candidacy (COC) for Mayor and substituted her husband as gubernatorial candidate.

On May 5, 2010, Renato M. Federico (Nationalista Party) filed his COC and Certificate of Nomination and Acceptance (CONA) to substitute Edna as mayoral candidate, past the December 14, 2009 deadline for withdrawals under Comelec Resolution No. 8678.
Comelec Law Department referred the matter to the En Banc. On May 8, 2010, Resolution No. 8889 purportedly gave due course to both Edna’s and Federico’s substitutions, despite the lapsed deadline for mayoral substitution.

Official ballots had been printed with “SANCHEZ, Edna P.” for Mayor; on election day she topped the count (28,389 votes vs. Maligaya’s 22,577). The Municipal Board of Canvassers (MBOC) issued a Certificate of Canvass and Proclamation (COCVP) on May 11, 2010 in her name.
A second, identically dated COCVP was later issued proclaiming “FEDERICO, Renato M.” with the same vote tally. Maligaya filed SPC No. 10-082 on June 1, 2010 to annul Federico’s proclamation.

Comelec Second and First Divisions denied Maligaya’s petitions to cancel Federico’s COC and to annul his proclamation for being time-barred and on merits, upholding Resolution No. 8889.
Maligaya filed a Verified Partial Motion for Reconsideration before the En Banc, arguing invalid substitution beyond deadline and fraudulent second COCVP.

On December 21, 2011, Comelec En Banc granted Maligaya’s motion, annulled Federico’s proclamation, and ordered a Special MBOC to proclaim Maligaya.
Federico filed a Rule 65 certiorari petition in the Supreme Court on December 23, 2011; the Court issued a TRO and later lifted it, with Vice-Mayor Armenius Silva seeking to intervene as successor under the Local Government Code.

Whether Renato Federico validly substituted Edna Sanchez as mayoral candidate given the December 14, 2009 substitution deadline for withdrawals under Comelec Resolution No. 8678.
Whether Comelec Resolution No. 8889, which gave due course to Federico’s COC, was binding and precluded challenge.

Whether Maligaya’s petition to annul Federico’s proclamation (filed June 1, 2010) was within the ten-day period from knowledge of the second COCVP issuance.

If Federico’s proclamation is annulled, whether Vice-Mayor Silva should succeed under Section 44 of the Local Government Code or whether Maligaya, as the only valid candidate, should be proclaimed.