Hobbs, Boston Housing Court, 95-SP-04475 (Winik, J., December 18, 1995). Keep in mind, however, that in a rental situation, it may be more difficult to dislodge a tenant if they do not meet their responsibilities than with a transitional lease agreement. Simply put, as these agreements are often oral, it can be difficult to prove that a particular rule or provision has been introduced, let alone that the tenant has agreed to comply with it. In essence, a lease by agreement is a kind of monthly lease. Instead of having a lease with a specific end date, this type of agreement allows either the tenant or the lessor to terminate the agreement at any time. "Estate-at-will" is another name for a lease by agreement. .