Iowa Code § 633.397
In all sales of property at public auction, the personal representative shall give such notice, in such form and manner, and to such persons or parties, as the court may prescribe. If no provision for notice is made by the court, the notice shall be published once each week for two consecutive weeks in some newspaper of general circulation in the county where sale is to be held, the last publication to be not less than one day nor more than seven days before the day of sale. If the property to be sold is located in more than one county, the sale may be held and notice given in any one or more of said counties. Unless otherwise provided by order of the court, the notice shall state the time and place of the sale and describe the property to be sold. Proof of service of the notice required shall be filed before confirmation of the sale.
Iowa Code § 633.397