Security Deposit nonrefundable if lease is broken

[Kerry Grimshaw]

I recently had a tenant who moved out for personal reasons prior to the end of her lease period. It was a one year lease (she moved 6 months early) My lease states: If you move prior to the end of this lease period then you will forfeit your security deposit. Would this clause legally stand up in court? 

[Scott P.]

I'm not a lawyer but I believe it would stand up in my State.  I think the reason for the deposit to help ensure the tenant fulfills the lease.