I have a month to month tenant, (1 year lease expired in Feb 2009). She gave me notice 3 days before September rent was due that she was moving. She told me to use the security deposit as last months rent and did not pay me for September. She asked me if I had saved the security deposit in a different account. I did not and I had to use it. It’s duplex and the front house was empty for 5 months. I am wondering if I had to put the security deposit in a different account – and if so how would this affect me if I take her to small claims court? She has 3 dogs and 2 cats and I know there will be some repairs that I will have to take care of.