When a confidential listing expires, the clerk shall change the registration of the confidential elector to inactive unless the confidential elector files a new request for a confidential listing or applies and qualifies for a nonconfidential voter registration. Wis. Stat. § 6.47(6).
Inactive confidential voter registrations must be kept confidential until destroyed under Wis. Stat. § 7.23(1)(c).
If the municipal clerk has notice that a confidential listing is scheduled to expire (end of the 24-month period), the clerk shall provide 30 days’ notice to the confidential elector of the scheduled expiration of the listing. Wis. Stat. § 6.47(7)(a).