Ohio Rev. Code Ann. § 4517.54
(B) Except as otherwise provided in section 4517.541 of the Revised Code, each franchisor proposing to terminate, cancel, discontinue, or not renew a franchise shall send written notice by certified mail of the proposed action to the franchisee at such time as may be necessary to ensure that the notice is received no later than ninety days before the effective date of the proposed action, or no later than fifteen days before the effective date of the proposed action when the proposed action is based upon any of the following: