Iowa Code § 507C.40
If a creditor, whose claim against an insurer is secured in whole or in part by the undertaking of another person, fails to prove and file that claim, then the other person may do so in the creditor's name and shall be subrogated to the rights of the creditor, whether the claim has been filed by the creditor or by the other person in the creditor's name to the extent that the other person discharges the undertaking. However, in the absence of an agreement with the creditor to the contrary, the other person is not entitled to any distribution until the amount paid to the creditor on the undertaking plus the distributions paid on the claim from the insurer's estate to the creditor equal the amount of the entire claim of the creditor. An excess received by the creditor shall be held by the creditor in trust for the other person. As used in this section, "other person" is not intended to apply to a guaranty association or foreign guaranty association.
Iowa Code § 507C.40
84 Acts, ch 1175, §40; 92 Acts, ch 1117, §28