Iowa Code § 354.24: Errors on recorded plats.

If an error or omission in the data shown on a recorded plat is detected by subsequent examinations or revealed by retracing the lines shown on the plat, the original surveyor or two surveyors confirming the error through independent surveys shall record an affidavit confirming that the error or omission was made. The affidavit shall describe the nature and extent of the error or omission and also describe the corrections or additions to be made to the plat and note a document reference number of the recorded plat. The recorder shall note on the record of the plat the word “corrected”, and note the document reference number of the recorded affidavit. A copy of the recorded affidavit shall be filed with the auditor and assessor. The affidavit shall raise a presumption from the date of recording that the purported facts stated in the affidavit are true, and after the lapse of three years from the date of recording the presumption shall be conclusive.