Ohio Rev. Code § 3599.33
No person, from the time ballots are cast or counted until the time has expired for using them as evidence in a recount or contest of election, shall willfully and with fraudulent intent make any mark or alteration on any ballot; or inscribe, write, or cause to be inscribed or written in or upon a registration form or list, pollbook, tally sheet, or list, lawfully made or kept at an election, or in or upon a book or paper purporting to be such, or upon an election return, or upon a book or paper containing such return the name of a person not entitled to vote at such election or not voting thereat, or a fictitious name, or, within such time, wrongfully change, alter, erase, or tamper with a name, word, or figure contained in such pollbook, tally sheet, list, book, or paper; or falsify, mark, or write thereon with intent to defeat, hinder, or prevent a fair expression of the will of the people at such election.
Whoever violates this section is guilty of a felony of the fifth degree.
R.C. §3599.33