Whether or not you are entitled to attorney fees if you have to collect on the written lease that your former tenants broke by not paying the full termination fee depends primarily upon what the written lease states. If there is an attorney's fee provision in the written lease signed by your former tenant, most likely if you prevail on your collection efforts you would be entitled to your reasonable attorney's fees for the process.Some states have statutes allowing for the award of attorney fees on an open book account as well. I suggest that you consult with an attorney about the collection process you want to pursue against your former tenant and entitlement to attorney's fees.