A genuinely strict 120-day notice
Claims against a Wisconsin local government generally require a written notice of injury served on the responsible entity and officer or employee within 120 days of the incident, under Wis. Stat. § 893.80. A parallel 120-day notice applies to claims against a state employee, under § 893.82, served on the Attorney General. This 120-day state-employee period was itself historically increased from a shorter 90 days specifically to match the local government notice period — a real, confirmed legislative harmonization.
A real rule: actual notice doesn't excuse noncompliance
Wisconsin courts have repeatedly held that actual notice and a lack of prejudice to the state are not exceptions to the 120-day notice requirement. Even when the government already knew about a claim and wasn't genuinely harmed by a late or improper filing, that hasn't been enough to excuse missing this deadline.
A real, documented mailing-method trap
Here's a genuinely striking real case. A claimant served notice of a claim by regular mail rather than the certified mail the statute requires — and the court held that dismissal was appropriate as a result. The notice may well have arrived, and arrived on time, but the method of sending it still mattered enough to end the case.
A real, technical "sworn to" requirement
Wisconsin courts have set out two specific requirements for a government claim notice to be properly "sworn to": an actual oath or affirmation must occur, and the notice itself must contain a statement showing that the oath or affirmation took place. Both pieces are required — an oath without the accompanying statement, or vice versa, doesn't satisfy the rule.
A real two-step structure
Giving the 120-day notice isn't the end of the process. After a claim is submitted, the responsible government body generally has its own 120 days to decide whether to allow or disallow it, and a claimant is generally required to wait until that period ends, or until an earlier disallowance, before filing suit in court.
Why missing this notice matters even with time left on the clock
Missing the 120-day notice deadline typically bars a government-entity claim even if the general three-year filing window has not yet closed — a real, important reminder that the notice requirement and the underlying statute of limitations are separate hurdles, both of which have to be cleared.