Ohio Revised Code Title XXXI. Domestic Relations Children § 3111.07

(A) The natural mother, each man presumed to be the father under section 3111.03 of the Revised Code, and each man alleged to be the natural father shall be made parties to the action brought pursuant to sections 3111.01 to 3111.18 of the Revised Code or, if not subject to the jurisdiction of the court, shall be given notice of the action pursuant to the Rules of Civil Procedure and shall be given an opportunity to be heard. The child support enforcement agency of the county in which the action is brought also shall be given notice of the action pursuant to the Rules of Civil Procedure and shall be given an opportunity to be heard. The court may align the parties. The child shall be made a party to the action unless a party shows good cause for not doing so. Separate counsel shall be appointed for the child if the court finds that the child's interests conflict with those of the mother.

If the person bringing the action knows that a particular man is not or, based upon the facts and circumstances present, could not be the natural father of the child, the person bringing the action shall not allege in the action that the man is the natural father of the child and shall not make the man a party to the action.

(B) If an action is brought pursuant to sections 3111.01 to 3111.18 of the Revised Code and the child to whom the action pertains is or was being provided support by the department of job and family services, a county department of job and family services, or another public agency, the department, county department, or agency may intervene for purposes of collecting or recovering the support.