Iowa Code § 516.1: Inurement of policy.

All policies insuring the legal liability of the insured, issued in this state by any company, association or reciprocal exchange shall, notwithstanding any other provision of the statutes, contain a provision providing that, in event an execution on a judgment against the insured be returned unsatisfied in an action by a person who is injured or whose property is damaged, the judgment creditor shall have a right of action against the insurer to the same extent that such insured could have enforced the insured’s claim against such insurer had such insured paid such judgment.