Ohio Revised Code Title I. State Government § 145.562

(A) Any person who is receiving an allowance or benefit or any increases under this chapter may, at any time, waive his rights thereto, or to a portion thereof, by filing a written notice of waiver with the public employees retirement board. Except as provided in division (B) of this section, such waiver shall remain in effect until the first day of the month following his death or the filing of his written cancellation of such waiver with the public employees retirement board. Any amount so waived shall be forever forfeited.

(B) If a beneficiary waives in writing all claim to any benefits under this chapter prior to receipt of the first benefit, the waiver shall put in effect the succession of beneficiaries as provided in division (C) of section 145.43 of the Revised Code and shall be irrevocable.