Ohio Rev. Code Ann. § 3745.72
(B) For the purposes of this section, a disclosure of information is voluntary with respect to an alleged violation of environmental laws only if all of the following apply:
(C) For the purposes of this section, a disclosure shall be in writing, dated, and hand delivered or sent by certified mail to the director of the state agency that has jurisdiction over the alleged violation, and shall contain all of the following in a printed letter attached to the front of the disclosure:
(E) The immunity provided by this section does not apply under any of the following circumstances: