Retired Wisconsin Supreme Court Justice Michael Gableman, told local radio station 1130 WISN this week that the statute is "very, very clear. If an absentee ballot does not have a witness address on it, it's not valid. That ballot is not valid." The Dan O'Donnell Show, meanwhile, claimed that the Wisconsin GOP "estimates that thousands of witness addresses may have been changed."
https://justthenews.com/politics-policy/elections/many-200000-wisconsin-residents-may-have-voted-absentee-without-having