Hello Tenant,
I would put a chain lock or a second lock on the door that you can fasten while you are in the apartment, but leave unlocked when you aren't home. You have a right to privacy and protection while you are in your home and shouldn't have to worry about someone walking in while you are there.
Chase
C&onsultant
Business, Custody, Marriage/Divorce, Criminal Law, Contract Negotiation, Entertainment Law