Iowa Code § 589.14

A tax deed executed more than ten years earlier which purports to sustain the record title, is not ineffectual because of the failure of the record to show that any of the steps in the sale and deeding of the property were complied with and these proceedings are legalized and valid as if the record showed that the law had been complied with.

84 Acts, ch 1090, §13; 91 Acts, ch 183, §23