Going going but not quite gone

[Ihe O.]

My tenant is 1.5 months behind on her rent just served notice to vacate at the end of the month, promising to pay all rent due before she leaves. Technically she has not given a full 30 days notice so there is probably another week that she would owe but I am not stressing myself over that - happy to get the apt back month end.

Then she comes back and says can she use security deposit in lieu of final month. I say no because it won't cover me for breakages and she owes another 3 weeks rent anyway, pay your rent please.

There's been no response and she is yet to give me a forwarding address.

I am mulling issuing a civil suit for the unpaid rent now that I still have an address where I know she can be served (my apt).

Assuming there are no breakages and she leaves when she says my max exposure is about $1k, ultimately though I may write it off, either way I am interested to see what is thought of my solution and what  other options there are.