Ohio Rev. Code § 3905.44: Limitation upon domestic companies.

No domestic insurance company, qualified under the laws of this state, shall do business in any other state or territory of the United States without being first legally admitted and authorized so to do under the laws of such state or territory. For violation of this section by any such insurance company, the superintendent of insurance may revoke the license or authority of such company doing business in this state and may require such company to pay the taxes upon such unlawfully written business to the state or territory in which it was written, as provided by the laws of such state or territory. "Do business" as used in this section does not include the maintenance or servicing of policies or contracts of insurance or annuity which have been lawfully written.