A lien created by operation of law not requiring the consent of, or a security agreement with, the debtor (for example, tax liens and mechanic's liens). For example, under most state laws, as security for the payment of its fees, a contractor or subcontractor has the statutory right to file a mechanic's (or construction) lien on the real property improved by its construction services. Similarly, a party that stores the borrower's goods acquires a warehouseman's lien on the goods to secure the payment of its storage fee.