Wis. Stat. § 69.10: Correction of obvious errors.

(1) Until 365 days after the occurrence of an event which is the subject of a vital record, the state registrar or a local registrar may correct an error in the record if he or she determines that the error is obviously inadvertent.

(2) A person with a direct and tangible interest in a vital record may petition a court to order a correction in the record under this section if the state or local registrar with whom the record is filed fails to make the correction.