Ohio Revised Code Title XXXIX. Insurance § 3937.32

(1) The policy number;

(2) The date of the notice;

(3) The effective date of cancellation of the policy, which shall not be earlier than thirty days following the date of the notice;

(4) An explanation of the reason for cancellation and the information upon which it is based, or a statement that such explanation will be furnished to the insured in writing within five days after receipt of the insured's written request therefor to the insurer;

(5) Where cancellation is for nonpayment of premium at least ten days notice from the date of mailing of cancellation accompanied by the reason therefor shall be given;

(6) A statement that if there is cause to believe such cancellation is based on erroneous information, or is contrary to law or the terms of the policy, the insured is entitled to have the matter reviewed by the superintendent of insurance, upon written application to the superintendent made not later than the effective date of cancellation of the policy.