I live in a 5-bedroom shared house. Four months ago, a roommate left and we sublet a room to a woman. We made the very silly mistake of not making her sign the lease, partly because there were only a few months left on the lease. Now, with one month left on the lease, she’s moving out–sticking the other four roommates with her portion of the tab.
She claims she shouldn't pay for two reasons: 1) She gave us over a month of notice that she'd be leaving before that last month. 2) She claims we told her when she moved in that she would be able to stay for longer than 4 months. Since she is forced to go, it isn't her fault for leaving early.
It is true that she made us aware that she was moving out early some weeks ago, but she did so by off-handedly mentioning it to one of the roommates. She did not discuss it with us individually or formally. We assumed that she would be paying for that last month. She didn't say, "I'm moving out, and I won't pay for the last month."
The second claim is false. At best, we said we weren't sure whether we would extend the lease for another year or not. She may well have had the impression we were staying, but we didn't do anything to give her this impression.
So, who's in the wrong here? In the absence of a signed document, is she basically a month-to-month tenant who has no obligation to stay so long as she gives us notice? If this is the case, was her notice adequate? We have her security deposit in cash, do we refund it to her or spend it on her rent?
[I’m not really looking for legal opinions (unless they shed light on who’s right), since we’re not going to take this to small claims court; worst case scenario we’ll just cover the extra rent.]