Votebeat:

For years, Mequon election workers employed an unusually strict standard for judging the validity of witness addresses on absentee ballot envelopes — a standard not apparently used elsewhere in Wisconsin and that the Wisconsin Elections Commission has now said is illegal.

Under that standard, Mequon officials rejected absentee ballots if the witness address did not include a state or ZIP code and the municipality name was not unique nationwide. That’s despite the fact that Wisconsin’s absentee ballot envelope no longer specifically asks witnesses to provide the information Mequon treated as essential: a state or ZIP code.

But a Votebeat review of hundreds of April 2026 absentee ballot envelopes, the dozens of ballots Mequon at least initially rejected since 2024, and scores of city records found that the city’s strict standard was applied unevenly — and, in some cases, resulted in the initial rejection of ballots that did not appear ambiguous at all.