If your landlord gives you a new agreement when you are already living in a place, you don't have to sign it if you have a month-to-month tenancy or a lease that goes month-tomonth to-month at the end of the term of the lease. However, you would have to sign a new agreement if you have a fixed-term lease that ends on a certain date with the stipulation that you have to move out at the end of the term. It's best to avoid fixed-term agreements with a move out date because the landlord may change the terms or raise the rent if you want to sign a new agreement and stay.