How do I write an addendum to a lease? Title the Document in a clear manner, such as "Lease Addendum" or "Rental Agreement Addendum".(Fill out all of the information in Part A.) 1. Contents of Tenancy Addendum. A completed lease rider or addenda must be attached to the vacancy lease and future renewal leases. Complete the Addendum: Fill in the template with the agreed-upon changes or additions. Ensure that the language is precise and easy to understand. Submit a completed "Landlord Request for Lease Renewal Approval" form and all required documents at least 60 days prior to the effective date of the new lease. Use the forms below to start or answer an eviction lawsuit where the landlord is claiming that the tenant owes back rent. A look at the lease signing process, including who needs to sign the lease, who signs the lease first, and who gets a copy of the lease.