A charge or claim which one person (as with a tax lien or) has upon the property of another (lienee) as security for a debt or obligation. Liens can be created by agreement of the parties (as with a mortgage) or by operation of law (as with a tax lien). They may be general (thus affecting all the debtor’s property, as in a judgment lien) or specific (thus affecting only a particular property, as in a mortgage given on one piece of property). Liens can be statutory or equitable, voluntary, or involuntary. For example, a mechanics lien is an involuntary, statutory, special lien, where as a mortgage is a voluntary, equitable, special lien.