Ohio Rev. Code § 2101.39
If a probate judge allegedly has a bias or prejudice for or against a party or a party's counsel in a proceeding pending before the judge, allegedly otherwise is interested in a proceeding pending before the judge, or allegedly is disqualified to preside in the proceeding and if the bias, prejudice, interest, or disqualification does not permit or require certification of the proceeding to the court of common pleas as provided by section 2101.38 of the Revised Code, any party to the proceeding or the party's counsel may file an affidavit of disqualification with the clerk of the supreme court. The affidavit of disqualification shall be filed and decided in accordance with divisions (B) to (E) of section 2701.03 of the Revised Code, and, upon the filing of the affidavit, the provisions of those divisions apply to the affidavit, the proceeding, the judge, and the parties to the proceeding.
R.C. §2101.39