Eviction without a lease in Washington state

[Ian D.]

I tried to search. I apologize in advance if it has already been asking. I let a friend stay in our rental for the last nine month for a discounted rent to get on his feet. He is now not paying rent and we need to evict him. Will this be more difficult without a lease? We offered him money to go away but he doesn’t have anywhere to go. Any other suggestions. Thank you