Ohio Rev. Code Ann. § 3309.022
(A) As used in this section:
(B) On re-employment of a member with the same employer that employed the member prior to the member's service in the uniformed services, the member may apply to the school employees retirement system on a form provided by the system to purchase service credit for service in the uniformed services that shall be considered the equivalent of Ohio service credit. On receipt of the application, the retirement system shall request from the employer that employed the member prior to the military service a certification that the member was employed by the employer prior to, and returned to employment with the employer within three months of honorable discharge or release from, service in the uniformed services. If the employer can so certify, it shall do so and shall pay to the retirement system the employer's contribution required by this section. The service credit shall be granted the member if all of the following requirements are met:
(F) If a member purchased service credit under section 3309.021 of the Revised Code prior to the effective date of this section, is not receiving a retirement allowance, and would have been eligible to obtain service credit pursuant to this section had it been in effect at the time of purchase, the retirement system shall refund the amounts paid by the member for the purchase if both of the following requirements are met: