Iowa Code § 633.41

Whenever in the course of the administration of any estate, it shall appear that any subject, citizen, or national of a foreign country is interested as an heir, devisee, legatee, or otherwise, and the address of such person is unknown to the personal representative, the personal representative shall give notice by mail to the consular representative of such country for Iowa of the pendency of such proceedings and of the particular interest of such foreign subject. If such consular representative shall not have filed the representative’s designation and address with the clerk, then such notice shall be mailed to the chief diplomatic representative of such foreign country at Washington, D.C. Failure to give such notice shall in no event and in no manner affect title to property.