Title
Vinzons-Chato vs. House of Representatives Electoral Tribunal
Case
G.R. No. 199149
Decision Date
Jan 22, 2013
A 2010 election protest challenged automated results, with ballot image integrity and HRET rulings upheld by the Supreme Court.

Case Summary (G.R. No. 199149)

HRET’s Early Actions and Contentions (G.R. No. 199149)

Panotes moved to suspend revision proceedings and demanded a preliminary hearing on the integrity of ballots and boxes. He urged, upon proof of tampering or improper preservation, printing of ballot images from CF cards. Chato opposed decryption and copying of images, citing lack of HRET guidelines and Section 10(d) of its own Rules requiring a preliminary hearing. She also alleged CF-card defects and replacements during election day, based on a TSN excerpt of canvassing. HRET nonetheless ordered decryption and copying of relevant ballot images.

HRET Resolutions and Preliminary Hearing Findings

At the May 27, 2011 hearing, Chato presented three witnesses whose testimonies lacked direct knowledge of CF cards in the precincts with variances. HRET Res. No. 11-321 (June 8, 2011) denied her motion to prohibit the use of decrypted ballot images, finding no proof of CF-card tampering or substitution affecting the contested precincts. HRET held that printed ballot images, under the Rules on Electronic Evidence, are functional equivalents of originals unless authenticity is genuinely questioned. Chato’s motion for reconsideration (Res. No. 11-487, September 15, 2011) was likewise denied.

Supreme Court Ruling on Use of Ballot Images (G.R. No. 199149)

The Court’s review for grave abuse of discretion emphasized deference to HRET’s exercise of its constitutional and rule-based authority. It recognized that under R.A. No. 9369, the paper-based AES generated “official ballots” both in paper and electronic image form. The PCOS machine’s encrypted CF-card images faithfully captured voter intent. HRET Guidelines permitted printing of such images when no proof of tampering emerged. Chato’s witnesses lacked material testimony as to CF-card integrity in the 20 precincts with variances. The Tribunal’s determination that ballot images were admissible and that CF cards were preserved was upheld.

HRET’s Continuation of Ballot Revision (G.R. No. 201350)

Chato’s recovery in pilot precincts fell short of unambiguous reversal, but HRET Res. No. 12-079 (March 22, 2012) ordered revision of the remaining 120 precincts, citing the need to “see the whole picture” and address prima facie substantial variances and questions about CF-card reliability. Panotes’s motion for reconsideration was denied (Order, April 10, 2012).

Supreme Court Ruling on Continuation of Revision (G.R. No. 201350)

The Court reaffirmed that HRET, as exclusive judge of House contests

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