[name of landlord]
[landlord street address]
[landlord town/city, state, zip code]
Dear [landlord name]:
This letter is in reference to the things you took from the apartment/house I rented from you at [your address].
On or about [date items were taken], you took the following items from my residence: ____________________
According to the Residential Landlord-Tenant Act, you cannot enter the rental premises without my consent, except in the event of an emergency or if you have a court order that authorizes entry [RCW 59.18.150]. Also, you cannot take or detain my personal property without my written consent. If you fail to return my property, you may be liable for the value of the property you took, any damage to the property and possibly up to $500 per day or $5,000 total; you may also be liable for the costs of a lawsuit plus attorney fees [RCW 59.18.230(4)].
Please consider this letter a written demand that you immediately return my personal property. Please call [your phone number] so we can work out how you will get the items to me.
If you do not immediately return the items listed above, I will seek assistance from the Superior Court and/or the County Sheriff to retrieve my possessions.
Thank you for your cooperation.