Ohio Rev. Code Ann. § 3901.18
(A) Before any unauthorized foreign or alien insurer may enter an appearance in any court action, suit, or proceeding or in any administrative proceeding before the superintendent of insurance, such unauthorized insurer shall either:
(C) Nothing in division (A) of this section shall prevent an unauthorized foreign or alien insurer from filing a motion to set aside service made in the manner provided in division (B) or (C) of section 3901.17 of the Revised Code on the ground either: