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. Deposit (if necessary), 1st month rental and rent on a pro rata basis (if the tenant moves in before the start of the lease). A lease is extremely important for any owner who wants to rent out their property. Even if you`re renting to a friend or family member or only for a short period of time, a lease can help protect you from many problems if (when) things don`t work. A rental agreement should go around all your expectations of the tenant and help ensure that the tenant and landlord remain responsible and liable for their share of the contract. Use a monthly lease if you don`t want to commit to renting your property for a whole year or more, but you still need to protect your rights.