Ohio Code § 3937.32

§ 3937.32.

(A) No cancellation of an automobile insurance policy is effective, unless it is pursuant

to written notice to the insured of cancellation.  Such notice shall contain: (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. (B) An insurer may include a notice of cancellation for nonpayment of premium with a

billing notice.  Subject to division (A)(5) of this section, such a cancellation is effective on

or after the due date of the bill.