Ohio Revised Code Title VII. Municipal Corporations § 727.43

No person who claims damages, arising without his fault from the acts of a municipal corporation or its agents in the construction of a public improvement, shall commence a suit therefor against a municipal corporation until he files a claim for such damages with the clerk of such municipal corporation, and sixty days elapse thereafter, to enable the municipal corporation to take such steps as it deems proper to settle or adjust the claim.

This section does not apply to an application for an injunction or other proceeding to which it may be necessary for such applicant to resort in case of urgent necessity.