Description of the property, monthly rental, deposit, purpose of use of the property, commercial or residential and duration. In the event of a dispute over the property between the owner and the tenant, the lease acts as proof. The general conditions can be negotiated, but after signing and also for the owner and tenant. It also mentions the conditions for termination of the contract. Why is the lease only valid for 11 months? Before moving into a rented property, many landlords require their tenants to sign rental agreements. A lease is a contract between a tenant and a lessor that gives a tenant the right to live in real estate for a fixed period of time, usually for a rental period of 6 or 12 months. A contract between the lessor and the lessee binds the parties to the lease. . .