<prompt> Human: Hello PF! We recently got a house and moved out of our apartment we had been at for several years. Since then, our landlord has done some crazy stuff. I wont go into the details, but we have reason to believe he is mentally unstable and is under the impression we owe him money we dont.My question is, since we have paid him for rent with a check before, should we change our bank account number? Is that just being paranoid? I dont think this is an easy task, as it requires changing our direct deposits, and all automatic payments. We previously had fraudulent charges from one of our debit cards, and our credit union took care of them quickly and easily - all we had to do was sign a couple of papers. Im not sure if it is worth the effort and possibly messing up depositspayments just in case.UPDATE: We went to the bank and, though they said it wasnt 100 necessary, we decided to change it. They also put a note on our account and will be asking for our identification whenever going into a branch from now on as a precaution. Thanks so much for all of the advice. We are very happy to hopefully have this behind us!  <response>: Bank teller here: You dont have too much to worry about. Having your account number alone with no other info makes it really difficult for him to do anything. Talk to your bank and have them put notes on your account requiring proper identification when a transaction is made. That protects you from all in person transactions since he wont be able to ID himself as you or whoever else is on the account. Banks are also quite good with fraudulent charges if anything were to happen. 