Iowa Code § 420.214
In the sale of real property for taxes and assessments, the notice of the time and place of such sale shall be given by the treasurer or the collector, and shall contain the description of each separate tract to be sold, as taken from the tax list; the amount of taxes for which it is liable, delinquent for each year, and the amount of penalty, interest, and cost thereon; the name of the owner, if known, or the person, if any, to whom it is taxable; by publication in some newspaper in the city once each week for two consecutive weeks, the last of which shall be not more than two weeks before the date of such sale, and by posting a copy thereof at the door of the office of the collector or treasurer one week before the day of such sale.
Iowa Code § 420.214