I moved out, had a walk through, and was told by my landlord (from a management company) that everything looked perfect and that I had even upgraded the unit. She stated she would be returning my full security deposit in full. The fifteen days have long passed and she has not returned my deposit and is not responding to my emails. Does she owe me interest? Can I ask for interest (similar to if I was late on rent)? What is my remedy and the landlord's penalty? Please note there is nothing in the lease except that it must be returned within 15 days.