The Arizona Supreme Court has cleared the way for auto insurers to block customers from "stacking" multiple uninsured or underinsured motorist policies after a single crash, siding with State Farm in a long-running coverage fight. The case traces back to an April 2019 wreck where a passenger’s medical bills blew past the limits of his own policy, and he tried to tap several State Farm policies held by his family. The ruling tightens how and when injured people can combine multiple policies to fill coverage gaps after a serious accident.
What the court decided
In State Farm Mutual Automobile Insurance Co. v. Balzan, the high court held that insurers may limit underinsured motorist (UIM) recovery to a single policy when the contract language clearly tracks Arizona’s anti-stacking statute and binds jointly insured purchasers, according to Arizona Supreme Court filings. The central question was whether a passenger injured in 2019 could stack UIM benefits from multiple State Farm policies that were all held within the same household.
How the dispute reached the high court
Connor Balzan was hurt in an April 2019 crash and requested UIM payments under his own Hyundai policy, then looked to additional household policies issued to his parents when his damages exceeded those limits. State Farm paid some benefits but refused others, then went to court seeking a declaratory judgment. The Arizona Court of Appeals later affirmed summary judgment for State Farm in 2024, creating the record and legal issues the state supreme court ultimately took up, as laid out in the Court of Appeals opinion.
How this fits with earlier law
The decision applies Arizona’s anti-stacking rule alongside earlier precedent, including the Supreme Court’s 2023 opinion in Franklin v. CSAA. In Franklin, the court said insurers must follow the statute’s specific method to bar stacking, either by putting an explicit statement in the policy or by sending written notice to the insured within 30 days after learning of the accident. Balzan digs into how those requirements work when multiple policies are jointly purchased within a household and whether an insurer’s election under one policy can bind coverage choices across those jointly held policies.
How the case landed in the headlines
Local coverage highlighted that the high court’s decision came down on State Farm’s side and concluded that the company’s anti-stacking language lined up with Arizona law. Reporting also walked through what this means for injured motorists whose medical bills outstrip a single policy’s limits, as reported by KJZZ. That story recapped the court’s outcome and the household-policy fight at the center of the dispute.
Statute and the practical bottom line
A.R.S. § 20-259.01 contains Arizona’s anti-stacking rule and spells out the two ways an insurer can limit stacking: clear, tracking language in the policy itself or a written post-accident notice telling the insured they can select one policy. The statute’s text and the Franklin decision remain the legal starting point. Under Balzan, insurers whose forms closely follow that statutory language and who satisfy the selection and notice mechanics have a stronger footing to deny stacking claims, per the court filings. For the statute text, see the version published on Justia.
What drivers should do now
Arizona drivers may want to pull out their declarations pages and skim the uninsured and underinsured motorist sections to see whether an anti-stacking clause is spelled out, and if the language is murky, ask their agent in writing whether coverage from multiple vehicles or policies can be combined. Policyholders who believe a carrier wrongly denied a claim can consider speaking with a lawyer or contacting the Arizona Department of Insurance to better understand their rights under A.R.S. § 20-259.01.
Going forward, Balzan is likely to be a go-to citation in fights over household policies and joint purchasers. For now, the ruling tilts negotiating power toward insurers that built clear, statute-conforming anti-stacking language into their forms.
