Ohio Rev. Code § 3901.08: Information from banks.

The superintendent of insurance may make written requisitions upon the officers or directors of any national bank, state bank, or state bank and trust company of this state, and upon any clearing corporation, direct participant, or member bank, as defined in section 3901.51 of the Revised Code, domiciled or doing business in this state, for information as he requires relating to the financial transactions of any of these institutions or entities with any insurance company, fraternal beneficiary association, or assessment association, authorized to do business in this state.