
Contesting a Will in Washington State is legally possible, but only under specific circumstances and within a strict four-month deadline from the time the Will is admitted to probate (RCW 11.24.010). To initiate a Will contest, you must be an “interested party”—such as a disinherited heir, a beneficiary from a prior Will, or a creditor. Valid reasons for challenging a Will include lack of testamentary capacity, undue influence, improper execution, or the existence of a newer Will.