Iowa Code § 592.2: Plats legalized.

None of the provisions of this chapter [ch 13, title V, Code of 1897] shall be construed to require replatting in any case where plats have been made and recorded in pursuance of law; and all plats heretofore filed for record and not subsequently vacated are hereby declared valid, notwithstanding irregularities and omissions in the required statement or plat, or in the manner or form of acknowledgment, or certificates thereof.