From the WI Assembly:
"To protect the integrity of our elections and ensure every legal vote counts, the Assembly Committee on Campaigns and Elections needs specific and actionable information sent to the following e-mail address:
We recommend that a complaint, concern, or allegation include the following:
• Specific and first-hand information regarding potential fraud/misconduct. Hearsay or news reports of non-specific events are not be useful.
• Detail on the incident/practice being reported (What, where, when and who).
• Any supporting materials that would be helpful in vetting the allegation. This could include photos or names of witnesses.
• Contact information so the person can be reached for clarification or additional information. If anyone chooses to remain anonymous, that is their right but it may limit the value of their information if it is incomplete."
Not checking IDs or verifying addresses is a big deal. They should definitely know about it.