Section 128Omnibus Election Code of the Philippines (Batas Pambansa Blg. 881), Sec. 128

Voter's identification. - The identification card issued to the voter shall serve and be considered as a document for the identification of each registered voter: Provided, however, That if the voter's identity is challenged on election day and he cannot present his voter identification card, his identity may be established by the specimen signatures, the photograph or the fingerprints in his voter's affidavit in the book of voters. No extra or duplicate copy of the voter identification card shall be prepared and issued except upon authority of the Commission.

Each identification card shall bear the name and the address of the voter, his date of birth, sex, civil status, occupation, his photograph, thumbmark, the city or municipality and number of the polling place where he is registered, his signature, his voter serial number and the signature of the chairman of the board of election inspectors.

Any voter previously registered under the provisions of Presidential Decree Numbered 1896 who desires to secure a voter identification card shall, on any registration day, provide four copies of his latest identification photograph to the board of election inspectors which upon receipt thereof shall affix one copy thereof to the voter's affidavit in the book of voters, one copy to the voter identification card to be issued to the voter and transmit through the election registrar, one copy each to the provincial election supervisor and the Commission to be respectively attached to the voter's affidavit in their respective custody.