Claim back is a legal term that refers to the process of recovering money or property that has been taken from you. A LIEN is a legal right that allows a creditor to claim a debt from a debtor, usually in the form of a security interest in the debtor's property. In other words, a LIEN gives the creditor the right to take possession of the debtor's property until the debt is paid off. Therefore, claiming back can refer to the process of reclaiming property or money that has been taken from you through a LIEN.