Wis. Stat. § 709.035: Amendments to report.

If at any time after completing a report, whether the original or an amended report, but before acceptance of a contract of sale or option contract an owner obtains information or becomes aware of any condition that would change a response on the completed report, the owner shall submit to a prospective buyer, within the time required under s. 709.02, a complete amended report or an amendment to the previously completed report, along with a copy of the previously completed report if not already submitted to the prospective buyer, that states all of the following:

(1) The address of the property.

(2) The owner’s name.

(3) The date of the report being amended.

(4) The number of any statement on the report that is affected by the new information.

(5) How the owner’s original response to the statement is changed and, if the response is changed to “yes”, an explanation of the reason why the response to the statement is “yes”.