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Washington State Law Library · Guide 23 of 23

Washington Case Authority Library

Washington's automobile-insurance rules do not live in statutes alone. Supreme Court decisions define how policies are interpreted, when an insurer must defend, what constitutes bad faith, when attorney fees are recoverable, how UIM and PIP operate, when an insurer may recover previously paid benefits, and what happens when a reasonable settlement opportunity is rejected. This library organizes the leading cases by the problem they help answer.

Current-law review: Sept. 13, 2026 Washington Supreme Court prioritized Auto + insurance + crash law Guide 23 of 23

How to use this case library

This page is an issue map. It is designed to help a crash victim, researcher or lawyer identify the Washington case family that governs a particular problem.

Step 1

Start with the statute

Identify the governing RCW or WAC provision in Guides 01–22.

Step 2

Find the case family

Use this page to locate the Washington decisions interpreting that rule.

Step 3

Verify current authority

Read the complete opinion and confirm later history before relying on it in litigation or a formal coverage position.

Citation alone is not legal research. A case can be distinguished, limited, superseded by statute, clarified by later authority or dependent on policy language materially different from the policy being analyzed.

Authority hierarchy

Authority Research weight
Washington Supreme Court Highest Washington judicial authority on state-law questions.
Published Washington Court of Appeals Precedential intermediate appellate authority, subject to contrary Washington Supreme Court law.
Federal appellate / district decisions applying Washington law Potentially persuasive on state law but not substitutes for controlling Washington appellate authority.
Unpublished Washington opinions Governed by GR 14.1 and do not carry the same precedential status as published opinions.
Library convention: CORE identifies especially important Washington Supreme Court decisions. SUPPORTING identifies important companion authority. RECENT identifies recent authority requiring continuing citation/history review.

Policy Interpretation & Coverage

Quadrant Corp. v. American States Insurance Co.
154 Wn.2d 165, 110 P.3d 733 (2005)
CORE POLICY INTERPRETATION

Read the policy as a whole from the standpoint of the average purchaser. Clear language is enforced as written. Ambiguity exists only when language is fairly susceptible to two reasonable interpretations; unresolved ambiguity is construed against the insurer.

American Star Insurance Co. v. Grice
121 Wn.2d 869, 854 P.2d 622 (1993)
CORE AMBIGUITY

Major Washington authority governing construction of insurance exclusions and ambiguity. The insured ordinarily bears the initial burden to establish coverage; the insurer bears the burden of establishing an exclusion.

Findlay v. United Pacific Insurance Co.
129 Wn.2d 368, 917 P.2d 116 (1996)
SUPPORTING EXCLUSIONS

Important efficient-proximate-cause and policy-language authority. Washington does not use a free-floating reasonable-expectations doctrine to rewrite otherwise enforceable insurance language.

Xia v. ProBuilders Specialty Insurance Co.
188 Wn.2d 171, 393 P.3d 748 (2017)
CORE EFFICIENT PROXIMATE CAUSE

Applies Washington's efficient-proximate-cause doctrine in liability coverage and is important when covered and excluded causal events contribute to the same loss.

Hill & Stout, PLLC v. Mutual of Enumclaw Insurance Co.
200 Wn.2d 208 (2022)
CORE PLAIN MEANING

Modern Washington Supreme Court policy-interpretation authority. Undefined terms ordinarily receive their plain, ordinary and popular meaning as understood by the average purchaser.

Kirk v. Mt. Airy Insurance Co.
134 Wn.2d 558, 951 P.2d 1124 (1998)
SUPPORTING COVERAGE / BAD FAITH

Important both for policy interpretation and for the consequences of an insurer's bad-faith refusal to defend.

Coverage Litigation & Attorney Fees

Olympic Steamship Co. v. Centennial Insurance Co.
117 Wn.2d 37, 811 P.2d 673 (1991)
CORE ATTORNEY FEES

Washington's flagship insurance-fee doctrine. When an insured is compelled to litigate to obtain the benefit of insurance coverage, the insurer can be responsible for the insured's reasonable attorney fees.

McGreevy v. Oregon Mutual Insurance Co.
128 Wn.2d 26, 904 P.2d 731 (1995)
CORE AUTO / UIM

Applies the Olympic Steamship doctrine in the automobile-insurance context and confirms its importance when an insured must litigate to obtain policy benefits.

Dayton v. Farmers Insurance Group
124 Wn.2d 277, 876 P.2d 896 (1994)
SUPPORTING COVERAGE vs. VALUE

Important in defining the boundary of Olympic Steamship. The fee doctrine does not convert every disagreement merely over the value of a covered claim into a coverage dispute.

Panorama Village Condominium Owners Association v. Allstate Insurance Co.
144 Wn.2d 130, 26 P.3d 910 (2001)
SUPPORTING COVERAGE FEES

Part of the Washington Supreme Court's Olympic Steamship line governing recovery of attorney fees in insurance coverage litigation.

Insurer Bad Faith, Claims Handling, IFCA & CPA

Tank v. State Farm Fire & Casualty Co.
105 Wn.2d 381, 715 P.2d 1133 (1986)
CORE BAD FAITH RESERVATION OF RIGHTS

Foundational Washington insurer-duty case. A liability insurer must give equal consideration to the insured's interests, and a carrier defending under reservation of rights assumes an enhanced obligation of fairness, investigation, communication and conflict-free defense handling.

Safeco Insurance Co. of America v. Butler
118 Wn.2d 383, 823 P.2d 499 (1992)
CORE PRESUMPTION OF HARM

Establishes important remedies for qualifying insurer bad faith, including a rebuttable presumption of harm in the reservation-of-rights setting and the doctrine of coverage by estoppel.

Industrial Indemnity Co. of the Northwest v. Kallevig
114 Wn.2d 907, 792 P.2d 520 (1990)
CORE INVESTIGATION

An insurer must conduct a reasonable investigation before denying a claim. Suspicion and conjecture are not substitutes for adequate claim investigation.

Coventry Associates v. American States Insurance Co.
136 Wn.2d 269, 961 P.2d 933 (1998)
CORE INVESTIGATIVE BAD FAITH

The duty to investigate is distinct from the ultimate duty to indemnify. An insurer can face bad-faith and Consumer Protection Act consequences for unreasonable claim investigation even where the coverage result ultimately favors the insurer.

Smith v. Safeco Insurance Co.
150 Wn.2d 478, 78 P.3d 1274 (2003)
CORE BAD FAITH / CPA

Major Washington authority concerning insurer bad faith, Consumer Protection Act remedies and the requirement to prove legally cognizable harm.

St. Paul Fire & Marine Insurance Co. v. Onvia, Inc.
165 Wn.2d 122, 196 P.3d 664 (2008)
SUPPORTING CLAIMS HANDLING

Recognizes that insurer claim-handling obligations can create independent bad-faith and CPA issues even where the underlying coverage duties require separate analysis.

Perez-Crisantos v. State Farm Fire & Casualty Co.
187 Wn.2d 669, 389 P.3d 476 (2017)
CORE IFCA

IFCA does not create a freestanding private cause of action for every violation of Washington's insurance regulations. Unreasonable denial of coverage or payment of benefits remains central to the statutory cause of action.

Duty to Defend

Truck Insurance Exchange v. VanPort Homes, Inc.
147 Wn.2d 751, 58 P.3d 276 (2002)
CORE DUTY TO DEFEND

Washington's defense obligation is broader than its duty to indemnify. The complaint is construed liberally in favor of triggering a defense where allegations can reasonably be interpreted as creating coverage.

Woo v. Fireman's Fund Insurance Co.
161 Wn.2d 43, 164 P.3d 454 (2007)
CORE CONCEIVABLE COVERAGE

A liability insurer must defend when the complaint, construed liberally, alleges facts that could conceivably impose covered liability.

American Best Food, Inc. v. Alea London, Ltd.
168 Wn.2d 398, 229 P.3d 693 (2010)
SUPPORTING EXTRINSIC FACTS

Explains Washington's narrow use of extrinsic evidence in duty-to-defend analysis and reinforces that an insurer cannot use outside facts simply to manufacture a basis to refuse a defense.

National Surety Corp. v. Immunex Corp.
176 Wn.2d 872, 297 P.3d 688 (2013)
SUPPORTING DEFENSE ANALYSIS

Important modern Washington authority refining when extrinsic facts can be consulted in determining whether the defense obligation exists.

Arden v. Forsberg & Umlauf, P.S.
189 Wn.2d 315, 402 P.3d 245 (2017)
SUPPORTING DEFENSE COUNSEL

Addresses the professional duties and conflict issues of insurer-appointed defense counsel in reservation-of-rights litigation.

Uninsured & Underinsured Motorist Coverage

Britton v. Safeco Insurance Co. of America
104 Wn.2d 518, 707 P.2d 125 (1985)
CORE UIM

Foundational Washington UIM authority emphasizing that UIM coverage is governed by RCW 48.22.030 and Washington's policy of protecting insured victims from inadequately insured motorists.

Tissell v. Liberty Mutual Insurance Co.
115 Wn.2d 107, 795 P.2d 126 (1990)
CORE UIM LIMITATIONS

Important Washington Supreme Court authority for testing UIM policy limitations against the statute and its protective purpose.

Mendoza v. Rivera-Chavez
140 Wn.2d 659, 999 P.2d 29 (2000)
CORE UIM STATUTE

Major decision interpreting Washington's UIM statutory framework and the relationship between tort damages, liability limits and UIM recovery.

Greengo v. Public Employees Mutual Insurance Co.
135 Wn.2d 799, 959 P.2d 657 (1998)
SUPPORTING UIM OFFSETS

Important in disputes over calculation of UIM benefits, limitations and claimed offsets.

Liberty Mutual Insurance Co. v. Tripp
144 Wn.2d 1, 25 P.3d 997 (2001)
CORE UIM SETTLEMENT

A UIM carrier may protect its subrogation rights through settlement notice provisions, but violation of such a provision does not automatically destroy coverage; actual prejudice must be established.

PIP, Subrogation, Made Whole & Reimbursement

Thiringer v. American Motors Insurance Co.
91 Wn.2d 215, 588 P.2d 191 (1978)
CORE MADE WHOLE

Foundational Washington made-whole authority. An insurer ordinarily takes reimbursement only from amounts remaining after the insured has been fully compensated for the loss.

Mahler v. Szucs
135 Wn.2d 398, 957 P.2d 632 (1998)
CORE PIP REIMBURSEMENT

Major authority concerning PIP reimbursement and allocation of the attorney fees and expenses incurred to create the recovery from which an insurer seeks repayment.

Winters v. State Farm Mutual Automobile Insurance Co.
144 Wn.2d 869, 31 P.3d 1164 (2001)
SUPPORTING COMMON FUND

Applies Washington common-fund principles where the insured's efforts generate liability and UIM proceeds from which a PIP insurer seeks recovery.

Sherry v. Financial Indemnity Co.
160 Wn.2d 611, 160 P.3d 31 (2007)
CORE PIP OFFSET

Important Washington Supreme Court authority applying insured-protection principles to PIP reimbursement, subrogation and offsets.

Durant v. State Farm Mutual Automobile Insurance Co.
191 Wn.2d 1, 419 P.3d 400 (2018)
CORE PIP MEDICAL BENEFITS

An insurer cannot add “maximum medical improvement” as a fifth ground for terminating PIP medical benefits beyond the criteria established by Washington's PIP claims regulation.

Daniels v. State Farm Mutual Automobile Insurance Co.
193 Wn.2d 563, 444 P.3d 582 (2019)
CORE MADE WHOLE

Reaffirms Washington's broad insured-first made-whole doctrine and its application when an insurer seeks recovery from the insured's compensation.

Failure to Settle, Excess Exposure & Covenant Judgments

Hamilton v. State Farm Insurance Co.
83 Wn.2d 787, 523 P.2d 193 (1974)
CORE FAILURE TO SETTLE

Foundational Washington failure-to-settle case. The liability carrier must give fair consideration to the insured's exposure and evaluate settlement as though the insurer effectively bore the entire potential judgment.

Besel v. Viking Insurance Co. of Wisconsin
146 Wn.2d 730, 49 P.3d 887 (2002)
CORE COVENANT JUDGMENT

A covenant not to execute does not eliminate the insured's harm from insurer bad faith. A settlement judicially determined reasonable can become the presumptive measure of damages in the later bad-faith case.

Chaussee v. Maryland Casualty Co.
60 Wn. App. 504, 803 P.2d 1339 (1991)
CORE REASONABLENESS

Supplies Washington's nine-factor framework for determining the reasonableness of a covenant settlement.

Bird v. Best Plumbing Group, LLC
175 Wn.2d 756, 287 P.3d 551 (2012)
CORE RCW 4.22.060

Confirms judicial determination of covenant-judgment reasonableness and the role of that determination in subsequent insurer litigation.

Vehicle Damage & Diminished Value

Moeller v. Farmers Insurance Co. of Washington
173 Wn.2d 264, 267 P.3d 998 (2011)
CORE DIMINISHED VALUE

The Farmers policy language before the Court covered the diminished market value remaining after collision damage had been properly repaired. The case remains an important reminder that repair cost and restoration of market value can be distinct issues.

Policy-language warning: Moeller does not establish that every modern first-party Washington auto policy necessarily provides identical diminished-value coverage. Read the current policy.

Comparative Fault & Allocation

Washburn v. Beatt Equipment Co.
120 Wn.2d 246, 840 P.2d 860 (1992)
CORE FAULT ALLOCATION

Major authority explaining Washington's transition to proportionate several liability and the relationship among comparative fault, settlements and contribution.

Kottler v. State
136 Wn.2d 437, 963 P.2d 834 (1998)
CORE RCW 4.22.070

Important Washington Supreme Court authority applying fault allocation and addressing the joint-and-several-liability exception applicable to a fault-free claimant.

Tegman v. Accident & Medical Investigations, Inc.
150 Wn.2d 102, 75 P.3d 497 (2003)
CORE INTENTIONAL TORTS

Intentional tort damages are not simply folded into Washington's negligence-based statutory fault allocation. Intentional and fault-based damages must be separated.

Work, Employer & Commercial Vehicle Liability

Rahman v. State
170 Wn.2d 810, 246 P.3d 182 (2011)
CORE SCOPE OF EMPLOYMENT

Modern Washington Supreme Court authority defining scope of employment and recognizing that mixed personal and employer purposes do not necessarily remove travel from the course of employment.

McNew v. Puget Sound Pulp & Timber Co.
37 Wn.2d 495, 224 P.2d 627 (1950)
SUPPORTING DUAL PURPOSE

Employer responsibility can remain where an employee combines personal business with the employer's business and the business purpose materially actuates the trip.

Elder v. Cisco Construction Co.
52 Wn.2d 241, 324 P.2d 1082 (1958)
SUPPORTING COMMUTING

States Washington's general rule that an ordinary commute in an employee's own vehicle ordinarily falls outside scope of employment.

Earl v. Campbell
Washington Supreme Court No. 104495-0, filed Sept. 3, 2026
RECENT EMPLOYER NEGLIGENCE

Confirms that direct negligent-retention liability and vicarious liability are analytically distinct and can proceed together even where the employer concedes that the employee acted within the scope of employment.

Wrongful Death & Survival

Otani v. Broudy
151 Wn.2d 750, 92 P.3d 192 (2004)
CORE SURVIVAL

Clearly distinguishes wrongful-death damages suffered by statutory beneficiaries after death from survival damages belonging to the decedent's qualifying predeath claims.

Kellogg v. National Railroad Passenger Corp.
199 Wn.2d 205, 504 P.3d 796 (2022)
CORE BENEFICIARIES

Confirms Washington's 2019 wrongful-death reforms eliminating the former dependency and United States residency requirements for qualifying second-tier parents and siblings.

Huntington v. Samaritan Hospital
101 Wn.2d 466, 680 P.2d 58 (1984)
SUPPORTING PERSONAL REPRESENTATIVE

Important authority concerning the role of the personal representative and Washington's general wrongful-death limitations framework.

White v. Johns-Manville Corp.
103 Wn.2d 344, 693 P.2d 687 (1985)
SUPPORTING DISCOVERY RULE

Addresses discovery-rule issues where the facts necessary to identify the cause of death could not reasonably have been known at death.

Settlement & Contract Enforcement

Condon v. Condon
177 Wn.2d 150, 298 P.3d 86 (2013)
CORE CR 2A

Washington settlement agreements are contracts. Condon is important when determining whether the parties actually reached an enforceable agreement and which material terms formed part of it.

Bird v. Best Plumbing Group, LLC
175 Wn.2d 756, 287 P.3d 551 (2012)
CORE COVENANT SETTLEMENT

Also belongs in the settlement library because it confirms Washington's court-centered reasonableness process for covenant judgments.

Cases can belong to more than one guide

Case Primary guide connections
Tank Claims Handling · Duty to Defend · Failure to Settle
Butler Bad Faith · Duty to Defend · Remedies
Olympic Steamship Coverage Interpretation · Claims Handling · Attorney Fees
Woo Policy Interpretation · Duty to Defend
Thiringer PIP · Reimbursement · Settlement
Mahler PIP · Common Fund · Settlement Distribution
Hamilton Failure to Settle · Excess Exposure
Besel Failure to Settle · Bad Faith · Covenant Judgment
Tripp UIM · Settlement & Release
Moeller Property Damage · Diminished Value
Rahman Employer / Commercial Vehicle Liability
Otani Wrongful Death · Survival Damages

Research discipline for using Washington case authority

This public library should point citizens toward the governing authority while preserving professional research discipline.
  1. Read the complete opinion. Do not rely only on a headnote, search-result summary or quotation from another case.
  2. Identify the precise holding. Separate the court's holding from factual background, dicta, concurrence and dissent.
  3. Check the statute in force at the time. Older UIM, wrongful-death and claims-handling cases may interpret prior statutory language.
  4. Check later authority. Determine whether the case has been limited, distinguished or superseded.
  5. Match the policy language. Insurance holdings can turn on a few words of contract language.
  6. Use the highest controlling authority. Washington Supreme Court authority outranks a conflicting lower-court or federal prediction of Washington law.
  7. Use the current official reporter version. Washington Courts warns that a slip opinion can later be revised before official publication.
  8. Check current statutes and regulations separately. Case law and current administrative rules work together.
Research candidates are deliberately omitted from this public page. A case should not become public library authority merely because its name appeared in a research spreadsheet. Citation, holding and continuing validity should be established first.

Washington Guide Crosswalk

Guide Primary case-law emphasis
01 State OverviewWashington statutory and appellate framework
02 Required InsuranceFinancial responsibility / exclusions
03 Finding Every PolicyCoverage identification
04 Who Is an Insured?Permission / policy definitions
05 UIMBritton · Tissell · Mendoza · Greengo · Tripp
06 StackingUIM statutory and anti-stacking authorities
07 Policy InterpretationQuadrant · American Star · Findlay · Xia
08 Coverage DisclosureClaims communication and disclosure authorities
09 IFCA / Bad FaithTank · Butler · Kallevig · Coventry · Smith · Perez-Crisantos
10 Insurance AgentsAgent duty / failure-to-procure cases
11 Duty to DefendVanPort · Woo · American Best Food · National Surety
12 Failure to SettleHamilton · Besel · Chaussee · Bird
13 Borrowed / RentalPermission and regular-use cases
14 Employer / CommercialRahman · McNew · Elder · Earl
15 RidesharePrimarily statutory
16 Government VehiclesMason v. Bitton and statutory claim rules
17 Comparative FaultWashburn · Kottler · Tegman
18 Crash InvestigationEvidence and preservation cases
19 Property LossMoeller
20 Wrongful DeathOtani · Kellogg · Huntington · White
21 PIP / LiensThiringer · Mahler · Winters · Sherry · Durant · Daniels
22 Settlement / ReleaseCondon · Chaussee · Bird · Besel · Tripp
23 Case Authority LibraryIntegrated Washington authority map

Bottom line

Washington has a particularly developed body of insurance law. The recurring principles are consistent: insurance policies are interpreted from the perspective of the average purchaser; exclusions and limitations are tested against the policy and governing statutes; the duty to defend is broad; insurer claim handling is constrained by good-faith duties; unreasonable investigation and denial can produce extra-contractual liability; UIM and PIP are strongly shaped by statute; and insurer reimbursement is limited by Washington's insured-protection doctrines. The cases on this page should be used as a map into that body of law. Before any case is relied upon in litigation, its complete opinion, reporter version, later treatment, statutory context and current validity should be checked.

Public legal education only. This case authority library is a research gateway rather than a citator or substitute for professional current-validity research. Reporter citations, holdings, statutory context, subsequent history and current treatment should be independently confirmed before a case is cited in a pleading, brief, formal legal opinion or insurance coverage position.