How to File a Notice to Pay or Vacate in Washington

1). Address the notice to each tenant who lives in the property. This includes tenants listed on the original lease, as well as any tenants who have moved in since then. If your tenant acquired a roommate whose name you do not know, write “(tenant's name) and all other occupants” or “(tenant's name) and John/Jane Doe.”
2). Write the full address of the tenant's residence, including the apartment number, if applicable. Include your address or the address to which the tenant must send the rent money.
3). Indicate the amount of rent that the tenant owes as of that date. Inform your tenant that he must pay the rent in full within three days or you will begin eviction proceedings.
4). Sign and date the notice. Make a copy of the notice for your records and give another copy to your attorney, if desired.
5). Deliver the notice to your tenant in person. This is the most desirable delivery method, because the tenant cannot dispute that he received the notice. If the tenant is not home, you may also deliver it to a person of suitable maturity in the household. For example, give it to an adult roommate or an older teenager.
6). Post the notice conspicuously on the tenant's door if no one of suitable maturity is there. (reference 1)
7). Mail an additional copy of the notice to the tenant if you did not hand it to him yourself. If you posted the notice or gave it to a secondary person in the household, mail a copy that day via first class mail. (reference 1)