Wis. Stat. § 299.08

(1) (a) Except as provided in par. (am) , the department shall require each applicant who is an individual to provide the department with the applicant's social security number as a condition of issuing or renewing any of the following: 1. A registration or license under s. 280.15 . 2. A certification under s. 281.17 (3) . 3. A license or certification under s. 281.48 (3) . 4. A certification under s. 285.51 (2) . 5. A certification under s. 289.42 (1) . 6. A license under s. 291.23 . 6m. A certification or registration under s. 292.63 (2) (g) . 7. A license under s. 299.51 (3) (c) . (am) 1. If an individual who applies for the issuance or renewal of a license, registration or certification specified in par. (a) does not have a social security number, the department shall require the applicant, as a condition of issuing or renewing the license, registration or certification, to submit a statement made or subscribed under oath or affirmation that the applicant does not have a social security number. The statement shall be in the form prescribed by the department of children and families. 2. A license, registration or certification specified in par. (a) that is issued in reliance on a statement submitted under subd. 1. is invalid if the statement is false. (b) The department may not disclose any information received under par. (a) to any person except as follows: 1. To the department of children and families in accordance with a memorandum of understanding under s. 49.857 . 2. If the department is required to obtain the information under s. 299.07 (1) (a) , to the department of revenue for the purpose of requesting certifications under s. 73.0301 and to the department of workforce development for the purpose of requesting certifications under s. 108.227 .