Suing Arizona Over a Crash? The 180-Day Notice of Claim Almost Nobody Hears About

If the party that caused your Arizona crash was a government entity — a city, county, state agency, public school district, or an employee acting on the job — the two-year deadline that applies to most injury claims does not apply to you. Arizona law requires a written notice of claim within 180 days of the incident, and missing it ends the case before it starts.

A separate, much shorter clock

A.R.S. § 12-821.01 requires anyone with a claim against a public entity, a public school, or a public employee to serve a written notice of claim within 180 days after the cause of action accrues. The statute is blunt about the consequence: a claim not filed within that window "is barred and no action may be maintained thereon." There is no judicial discretion to extend it for a good excuse — Arizona courts have applied this deadline strictly.

The notice itself is not a lawsuit. It is a formal written demand, served on the specific public entity or employee, that sets out the facts of the claim and a specific settlement amount. Getting the recipient and the content right matters as much as getting the timing right — a notice served on the wrong department, or missing the required settlement figure, can be treated as no notice at all.

When the 180 days starts running

The clock starts when "the damaged party realizes he or she has been damaged and knows or reasonably should know the cause, source, act, event, instrumentality or condition that caused or contributed to the damage" — in most crash cases, that is the date of the crash itself, not the date an injury is formally diagnosed.

Two exceptions extend the deadline: if the entity has its own administrative or dispute-resolution process, the 180 days can run from the date of the final decision instead; and a minor or a person under a legal disability at the time of the injury gets 180 days after the disability ends, rather than 180 days from the incident.

The claim does not just sit there, either

Once a valid notice of claim is served, the public entity has 60 days to respond. If it does not act within that window, A.R.S. § 12-821.01 treats the claim as denied by operation of law — which starts the countdown toward the next deadline.

A second, separate deadline follows the first

Even after a proper notice of claim is filed, the lawsuit itself has its own clock. A.R.S. § 12-821 sets a one-year statute of limitations for actions against public entities and public employees — half the two-year window Arizona gives for a typical claim against a private driver or business. Both deadlines run in the same case: miss the 180-day notice and there is no claim to bring; miss the one-year suit deadline and a timely notice does not save the case either.

What counts as "public" is not always obvious

A city bus, a county road crew, a state trooper, and a public school bus are clear examples. Less obvious: a private contractor doing roadwork under a city contract may or may not count as a "public employee" depending on the contract terms, and a crash involving a public hospital or a special taxing district can raise the same notice requirement in less visible ways. Because the wrong guess here can burn through most of the 180 days before anyone notices the mistake, identifying every potentially public defendant early — not just the obvious one — is worth doing before the clock runs further.

This article is general legal information, not legal advice. Whether a specific defendant qualifies as a public entity or employee, and how the notice must be served, depend on the facts of each case — consult a licensed Arizona attorney promptly if a government entity may be involved.