To be valid, an assignment must be in writing. With a Landlord's Consent to Lease Assignment, landlords and property managers can give formal approval to tenants who wish to exit their lease agreement.If you cannot find a form you need, you can contact the Trial Court Law Libraries and they will assist you. You need to make sure that the landlord has given his or her consent for the Lease Assignment to go into effect. Fill out Assignment of Lease from Lessor with Notice of Assignment - Massachusetts online. A landlord consent to assignment document grants the tenant permission to transfer the lease's benefits and responsibilities to another party. Upon the sale, foreclosure or other transfer of the building, the landlord must transfer the last month's rent to the new landlord with accrued interest. This document summarizes an assignment of a lease from a tenant to an assignee, with consent from the landlord. You will then need to fill out a lease assignment agreement, outlining the proposed assignee, current tenant, landlord, and existing lease term. The landlord needs to consent to the lease transfer through a "License to Assign" document.