Does a Washington notice to quit need to be notarized?
No. Washington notices to quit do not require notarization to be valid. The landlord (or agent) signs the notice; that signature, plus proper service, is what gives the notice legal effect. Notarization is sometimes used as evidence of authenticity in contested cases, but it is never a statutory prerequisite. What does need to be precise: the tenant's full name, the property address, the violation or amount owed, the cure period (14 days for pay-or-quit under RCW 59.12.030, 10 days for violations), the consequence of non-compliance, and the landlord's signature and date. Errors in any of these elements are a more common cause of dismissed cases than the absence of a notary stamp.
Source: Washington eviction code
This is an informational answer based on Washington eviction code as of early 2026. It is not legal advice. Housing law changes year to year and local ordinances (especially in rent-controlled or rent-stabilized cities) can override or add to state law. For contested cases, consult a Washington-licensed attorney.