The landlord must provide a copy of the rental agreement to each tenant that signs it. The tenant may request one free replacement copy during the tenancy.A Washington lease agreement is a legal document establishing a landlordtenant relationship. A Washington lease agreement is a document that outlines the terms of a rental between a landlord and a tenant. These forms are required for creating a legal lease or rental agreement based on the circumstances. A rental agreement between the landlord and tenant sets down the terms that will be followed while the tenant lives in the rental unit. Read Landlords must give a "good" reason to end a tenancy or not renew a lease to learn more. You usually pay rent monthly.