Ohio Rev. Code § 711.23
As used in this section, "incompetent person" means a person who is so mentally impaired, as a result of a mental or physical illness or disability, as a result of intellectual disability, or as a result of chronic substance abuse, that the person is incapable of taking proper care of the person's self or property or fails to provide for the person's family or other persons for whom the person is charged by law to provide.
If the court of common pleas is of the opinion that any person owning a lot in a plat, addition, or part thereof proposed to be vacated or altered, and not assenting to such vacation or alteration, will sustain damage thereby, it may proceed to hear proof in reference thereto, and may render judgment against the petitioners for such damages as it thinks proper and just, to be assessed ratably against the petitioners by the court, according to the value of the property owned by the petitioners as it stands taxed on the tax list of the county. When necessary, the court shall appoint a guardian ad litem for all minors or incompetent persons interested in the premises. The judgment of the court vacating such plat, addition, or parts thereof, shall be conditioned upon the payment of the damages thus assessed.
R.C. § 711.23