I beleive you have to legally follow the eviction process in your state, usually with a 30 days written notice, even if she does pay some amount for rent you can still give a notice "for cause" which doesn't require a reason other than you just want her to leave, but check ur states eviction laws. Usually you can get the answer as to how to proceed by just phoning ur county court building an ask the court clerk how an what to do.
