I dont know how your system works in the US, but here in Spain, I change the lock when i move into a rented apartment. When i move out, i hand the new keys to t

I dont know how your system works in the US, but here in Spain, I change the lock when i move into a rented apartment. When i move out, i hand the new keys to the owner. That way i make sure no old tenets or the owner can enter my apartment as they have no right to enter once its rented.