Iowa Code § 443.4: Tax list delivered — informality and delay.

The county auditor shall make an entry upon the tax list showing what it is, for what county and year, and deliver it to the county treasurer on or before June 30, taking the treasurer’s receipt therefor; and such list shall be a sufficient authority for the treasurer to collect the taxes therein levied. No informality therein, and no delay in delivering the same after the time above specified, shall affect the validity of any taxes, sales, or other proceedings for the collection of such taxes.