Generally, if the tenant files for bankruptcy protection, the trustee for the tenant's bankruptcy estate may elect to assume or reject an un-expired lease. If the tenant wants to assume the lease and keep it in effect, the tenant may have to pay all back rental payments and provide assurance of future performance under the lease. If the tenant rejects the lease, the tenant must give up possession of the unit and move out. The unpaid rent from the period prior to the filing of bankruptcy becomes a general unsecured claim of the landlord against the tenant, except to the extent of the security deposit. The landlord may also have a claim for damages for lost future rents.