Iowa Code § 515.108: Insurance in unauthorized companies.

No action shall be maintained in any court in the state upon any policy or contract of fire insurance issued upon any property situated in the state by any company, association, partnership, individual, or individuals that have not been authorized by the commissioner of insurance to transact such insurance business, unless it shall be shown that the insurer or insured, within six months after the issuing of such policy or contract of insurance, has paid into the state treasury two percent of the gross premium paid or agreed to be paid for such policy or contract of insurance.