Ohio voters are now required to provide proof of identity before voting. The form of identification that you may use includes your current and valid state-issued photo identification card, military identification, copy of utility bill, bank statement, paycheck, government check, or government document showing your name and current address. (Note: You cannot use as proof of identification a notice that the board of elections mailed to you.) If you do not have, or fail or refuse to provide, the required proof of identity, you may cast a provisional ballot.

R.C. 3503.28(A)(1)(6)
Voters must bring identification to the polls in order to verify identity. Identification may include a current and valid photo identification, a military identification, or a copy of a current utility bill, bank statement, government check, paycheck, or other government document, other than a reminder or a voter registration notification, that shows the voter's name and current address. Voters who do not provide one of these documents will still be able to vote by providing the last four digits of the voter's social security number and by casting a provisional ballot.
Voters who do not have any of the above forms of identification, including a social security number, will still be able to vote by signing an affirmation swearing to the voter's identity under penalty of election falsification and by casting a provisional ballot.
(The above requirement is effective June 1, 2006)