No agreement in conflict with, modifying, or extending any contract of insurance shall be valid unless in writing and made a part of the policy.
RCW 48.18.190
Policy must contain entire contract.
Applied in 14 court decisions — leading case 71 Wash. App. 194 - Denny's Restaurants, Inc. v. Security Union Title Insurance (1993)
Most recently applied in Michelman v. Lincoln National Life Insurance (July 2012)
1947 c 79 s .18.19; Rem
How often courts cite this section
Court decisions citing this, by year. The dip in the last several years is a data-coverage gap, not a real trend — our corpus holds fewer opinions from the most recent years, so recent citations are undercounted.
Official source: Washington State Legislature. Reproduced from public-domain Washington statutes; confirm against the official source for the current text. Not legal advice.