Use a commercial lease if you are renting an office building, retail space, restaurant, industrial facility, or real estate in which the tenant will operate a business. Messages – If the tenant or landlord violates any part of the rental agreement, the parties must have both addresses (mail and/or email) to which each can send a notification. Terms and Conditions – Guidelines recorded in a contract that must be met to maintain a valid agreement. A simple lease form must mention the parties signing the lease and their place of residence. First, write: Renewal Letter – To renew a lease and make changes to the agreement like the monthly rent. Use a standard rental agreement to rent a residential property for a fixed period of one year usually. .