For all commercial rental properties:
For use fore residential rental properties, other than in Seattle or Tacoma:
For Seattle month-to-month residential rental properties:
For Tacoma month-to-month residential rental properties, serve both:
A notice to terminate tenancy (a/k/a “20-Day Notice”) is used to terminate a month-to-month periodic tenancy. If the tenant fails to vacate the landlord must bring an eviction action (unlawful detainer action) and follow the same process as when a tenant fails to pay rent or commits other breaches of the lease.
It is important to understand that the nickname “20-day Notice” can be a bit confusing. This does not mean add twenty days to the current date. The date of termination must be the last day of a rental period. The notice must be served at least twenty days in advance.
For Seattle for residential tenants, even for a month-to-month tenant the landlord must have just cause to evict. Some grounds require more than 20 days, such as selling a home or a family member seeking to move into the rental property.
Tacoma residential month-to-month tenancies requires 60 days notice to terminate.
Your lease terms may require more than the legal minimum number of days.