(1) As to a surplus line risk which has been assumed by an unauthorized insurer pursuant to this surplus line insurance law, and if the premium thereon has been received by the surplus line broker who placed such insurance, in all questions thereafter arising under the coverage as between the insurer and the insured the insurer shall be deemed to have received the premium due to it for such coverage; and the insurer shall be liable to the insured as to losses covered by such insurance, and for unearned premiums which may become payable to the insured upon cancelation of such insurance, whether or not in fact the broker is indebted to the insurer with respect to such insurance or for any other cause.