Wis. Stat. § 201.14
Securities issued by any such corporation, for the issuance of which a certificate should have been, but through excusable neglect or mistake was not, applied for, may be validated by the commission upon application of such corporation, signed and verified by the president and secretary, and setting forth the information required by s. 201.05(1), and in addition thereto a concise statement of the reasons why such application was not made at the time such securities were issued. If the commission shall find and determine that such failure to make application was due to excusable neglect or mistake, and was not occasioned by any design to evade compliance with the law, and that such issue was otherwise in accordance with law, the commission shall issue to the corporation a validating certificate.
Wis. Stat. § 201.14