The Wisconsin Election Commission (WEC) mailed postcards on June 15 to registered voters in Wisconsin who have not voted in the past 4 years (since the November 2020 General Election). These voters have 30 days to respond to let their clerk know whether they want to stay on the active voter list. If you receive a card and your clerk does not hear from you or if your mailing is undeliverable, you will be placed on the inactive list and need to reregister. 

More information from the Wisconsin Elections Commission is available here.