from personal experiences: If she has mail coming to you're address you will legally have to evict her (if she doesnt want to leave). Even if there isn't any lease agreement or shit like that cops won't do anything. Also don't just threw her shit out and change the locks if she's going to be pissed, she can make you let her back in. If she left peacefully, then yes change all locks immeditaly and tell her to fuck off. GL. Bitches be crazy