Our landlord gave us a 60 days notice of non-renewal of our lease on July 31st. Our lease expires on September 1st. She specified in the non-renewal letter that we can stay in the apartment until Sept 31st. We had already sent our August rent to her at this point. Last weekend, we found a new apartment and agreed to sign a lease that begins on Sept 1st. Yesterday, (8/16) I sent a registered, certified letter notifying our landlord that we will be moving out by end of day on 9/4. I believe that she should then return our last month's rent minus 4 days to us. Is that correct? (This is in Massachusetts.)