正式的租约一般有专门的Security Desposit clause,其中包括
If the Tenant breaks or otherwise violates this Lease prior to the official move-out date, the Landlord may be able to keep all or part of this Security Deposit to cover unpaid rent and or/damage to the property.
你自己去看看你的lease有什么关于security deposit的规定。再回来问。