Certificate of Service: Washington allows a landlord’s notice to be personally delivered, left with a person of suitable age at the residence and mailed, or posted on the property and mailed. The Certificate records how the notice was served. (RCW 59.12.040)

Required Notice

Week-to-Week Notice: Tenant: 20 days; Landlord: just cause required (RCW 59.18.200, RCW 59.18.650)
Month-to-Month Notice: Tenant: 20 days; Landlord: just cause required (RCW 59.18.200, RCW 59.18.650)
Notice of Non-Renewal: 60 days for qualifying fixed-term leases (RCW 59.18.650(1))

Sample

PDF Word

Washington Lease Termination Letter

Required Notice

Sample