Western States Law Library › Arizona
Western States Auto Insurance & Crash Law Library
Arizona Auto Insurance & Crash Law
A 23-guide public legal education library for understanding Arizona automobile liability, insurance coverage, UM/UIM, stacking, insurer duties, commercial and rideshare vehicles, comparative fault, damages, wrongful death, reimbursement and settlement.
Arizona crash law begins with four separate questions
A crash does not produce one insurance question. The investigation should separately determine liability, insured status, available insurance and legally compensable loss before settlement closes any claim.
Identify each driver, owner, employer, business, government entity and nonparty whose conduct contributed to the loss.
Liability, UM/UIM, MedPay and other coverages can use different definitions of insured status.
Search driver, owner, household, employer, commercial, umbrella, excess, rideshare and first-party policies.
Document injury, medical expense, earnings, household services, property loss and noneconomic damages before valuing settlement.
Arizona current-law snapshot
Several Arizona rules deserve special attention
UM/UIM is an offer-and-selection system
Arizona does not simply impose one fixed UM/UIM package. Section 20-259.01 requires insurers to make the coverages available and offer them to the named insured, with the declarations page playing an important role in the statutory selection or rejection process.
Stacking is a major Arizona issue
Section 20-259.01(H), Franklin v. CSAA, and the Arizona Supreme Court's 2026 Balzan decision make the number of policies, vehicles, insureds and applicable anti-stacking language critical to serious UM/UIM claims.
Fault includes nonparties
Section 12-2506 directs the fact finder to consider the fault of all persons who contributed to the injury when the statutory requirements for nonparty fault are satisfied.
Household liability limitations require scrutiny
Arizona permits certain family or household liability limitations to reduce otherwise higher liability coverage to the financial- responsibility minimum. The exact exclusion and current authority must be reviewed before applying it.
MedPay has a statutory lien rule
Section 20-259.01(J) permits a qualifying automobile insurer to assert a lien concerning MedPay amounts above $5,000 when statutory perfection requirements are satisfied, and requires fair and equitable compromise of the lien.
UM/UIM wrongful death has an extra insured-status requirement
Section 20-259.03 limits wrongful-death recovery from UM/UIM coverage to a qualifying wrongful-death claimant who is also a surviving insured under the applicable coverage, with an estate rule if none exists.
Rideshare coverage follows app status
A.R.S. §28-4038 creates different TNC insurance requirements depending on whether the driver is merely logged in, has accepted a ride or is transporting a passenger.
Claims handling has both statutory and common-law layers
A.R.S. §20-461 identifies unfair claim settlement practices, while Arizona appellate law separately governs contractual and common-law insurer good-faith duties.
The Arizona 23-guide system
The series moves from basic financial responsibility and insured status through specialized vehicle use, liability, damages, reimbursement, settlement and the Arizona case authority library.
Coverage Foundations
The Arizona liability, insurance, UM/UIM, fault and damages map.
02 Required Auto Insurance & Minimum LimitsFinancial responsibility, 25/50/15 limits, permissive users, exclusions and the Arizona motor-vehicle liability policy.
03 Finding Every Insurance PolicyDriver, owner, household, business, employer, umbrella, excess and first-party coverage.
04 Who Is an Insured?Named insureds, permissive users, household members and coverage-specific insured definitions.
05 Uninsured & Underinsured Motorist CoverageSection 20-259.01, offers and rejection, insured status, unidentified vehicles and the UIM damages calculation.
06 Stacking & Multiple Insurance PoliciesSection 20-259.01(H), separate coverages, selection provisions, Franklin and the 2026 Balzan decision.
07 Policy Interpretation, Exclusions & Coverage DisputesPolicy language, Arizona reasonable-expectations doctrine, exclusions, endorsements and statutory overrides.
Insurance Duties & Coverage Enforcement
Policy identification, limits information, litigation disclosure and Arizona insurer obligations.
09 Claims Handling & Insurance Bad FaithA.R.S. §20-461, fair investigation, reasonable claim evaluation and Arizona common-law bad faith.
10 Insurance Agents & Failure to Procure CoverageProducer duties, requested insurance, representations and missing coverage.
11 Duty to DefendDefense obligations, reservation of rights, conflicts and coverage litigation.
12 Third-Party Failure to SettlePolicy-limits opportunities, protection of the insured and Arizona excess-exposure doctrine.
Vehicle Ownership & Use
Permission, nonowned vehicles, rentals, peer-to-peer car sharing, insurance priority and the Graves Amendment.
14 Work, Employer & Commercial VehiclesRespondeat superior, business use, employer liability and commercial auto coverage.
15 Rideshare InsuranceA.R.S. §28-4038, app status, TNC insurance, personal-policy exclusions and coverage investigation.
16 Government Vehicle CrashesPublic entities, public employees, notice-of-claim requirements, governmental defenses and special deadlines.
Crash Liability & Damages
Pure comparative negligence, nonparty fault, several liability and statutory exceptions.
18 Crash InvestigationScene evidence, reports, witnesses, vehicles, electronic data and liability reconstruction.
19 Crash DamagesMedical expenses, future care, earnings, earning capacity, noneconomic damages and property loss.
20 Wrongful DeathA.R.S. §§12-611–12-613, statutory beneficiaries, damages, survival issues and the special UM/UIM rule in §20-259.03.
Reimbursement, Settlement & Authority
Arizona's statutory MedPay lien, health-plan reimbursement, Medicare, Medicaid/AHCCCS and other recovery claims.
22 Settlement & ReleaseMultiple defendants, lien resolution, UM/UIM preservation, releases and final settlement analysis.
23 Arizona Case Authority LibraryThe doctrine-by-doctrine research index for Arizona Supreme Court and published Court of Appeals authority.
Primary Arizona sources
VictimsGuide explains the system. The current primary sources control it.
Current Arizona Revised Statutes, session laws and legislative history.
Arizona Legislature →Arizona Supreme Court and Court of Appeals opinions, dockets and case information.
Arizona Courts →Automobile insurance requirements, consumer information and insurance regulation.
Arizona DIFI →Motor vehicle registration, mandatory insurance and crash-related procedures.
Arizona DOT →Current Supreme Court opinions including the developing Arizona UM/UIM stacking authorities.
Supreme Court Cases →Civil procedure, discovery, disclosure and litigation requirements relevant after a crash claim enters suit.
Court Rules →Start with the complete Arizona coverage map.
Do not let the insurance card define the case. Identify every person and entity that may be legally responsible. Find every applicable policy. Determine insured status separately for each coverage. Preserve UM/UIM rights. Allocate fault under Arizona law. Document the complete loss. Then evaluate reimbursement and settlement only after the entire legal and insurance structure is visible.