Payment securities are financial instruments that provide a guarantee of payment for a loan or other debt. Liens are one type of payment security, which are legal claims against a property that must be paid off before the property can be sold. Liens are typically used to secure payment of a debt, such as a mortgage or car loan. They are also used to secure payment of taxes or other fees. Liens are usually enforced by a court order and can remain in place until the debt is paid off.