Iowa Code § 547.1
A person shall not engage in or conduct a business under a trade name, or an assumed name of a character other than the true surname of each person owning or having an interest in the business, unless the person first records with the county recorder of the county in which the business is to be conducted a verified statement showing the name, post office address, and residence address of each person owning or having an interest in the business, and the address where the business is to be conducted. However, this provision does not apply to any person organized or incorporated in this state as a domestic entity or authorized to do business in this state as a foreign entity if the person is a limited partnership under chapter 488; a limited liability company under chapter 489; a corporation under chapter 490; a professional corporation under chapter 496C; a cooperative or cooperative association under chapter 497, 498, 499, 501, or 501A; or a nonprofit corporation under chapter 504.
Iowa Code § 547.1
89 Acts, ch 102, §3; 96 Acts, ch 1170, §23; 2004 Acts, ch 1021, §119; 2004 Acts, ch 1049, §191; 2005 Acts, ch 4, §2; 2006 Acts, ch 1030, §67; 2008 Acts, ch 1162, §152, 154, 155