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Security interest

In finance, a security interest is a legal right granted by a debtor to a creditor over the debtor's property (usually referred to as the collateral) which enables the creditor to have recourse to the property if the debtor defaults in making payment or otherwise performing the secured obligations. One of the most common examples of a security interest is a mortgage: a person borrows money from the bank to buy a house, and they grant a mortgage over the house so that if they default in repaying the loan, the bank can sell the house and apply the proceeds to the outstanding loan. Although most security interests are created by agreement between the parties, it is also possible for a security interest to arise by operation of law. For example, in many jurisdictions a mechanic who repairs a car benefits from a lien over the car for the cost of repairs. This lien arises by operation of law in the absence of any agreement between the parties. Most security interests are granted by the person who owns the property to secure their own indebtedness. But it is also possible for a person to grant security over their property as collateral for the debts of another person (often called third party security). So a parent might grant a security interest over their home to support a business loan being made to their child. Similarly, most security interests operate to secure debts or other direct financial obligations. But sometimes a security is granted to secure a non-financial obligation. For example, in construction a performance bond may secure the satisfactory performance of non-financial obligations. The different types of security interest which can arise and the rights which they confer will vary from country to country. A secured creditor takes a security interest to enforce its rights against collateral in case the debtor defaults on the obligation. If the debtor goes bankrupt, a secured creditor takes precedence over unsecured creditors in the distribution. There are other reasons that people sometimes take security over assets.

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Hypothec
Hypothec (haɪˈpɒθɪk,_ˈhaɪpɒθ-; Hypothek, hypothèque, hipoteka, from Lat. hypotheca, from Gk. ὑποθήκη: hypothēkē), sometimes tacit hypothec, is a term used in civil law systems (e.g. the law of all of Continental Europe except Gibraltar) or mixed legal systems (e.g. Scots law, South African law) to refer to a registered non-possessory real security over real estate, but under some jurisdictions it may sometimes also denote security on other collaterals such as securities, intellectual property rights or corporeal movable property, either ships only (ship hypothec) as opposed to other movables covered by a different type of right (pledge) in the legal systems of some countries, or any movables in legal systems of other countries.
Floating charge
In finance, a floating charge is a security interest over a fund of changing assets of a company or other legal person. Unlike a fixed charge, which is created over ascertained and definite property, a floating charge is created over property of an ambulatory and shifting nature, such as receivables and stock. The floating charge 'floats' or 'hovers' until the point at which it is converted ("crystallised") into a fixed charge, attached to specific assets of the business. This crystallisation can be triggered by a number of events.
Lien
A lien (ˈliːn or ˈliːən) is a form of security interest granted over an item of property to secure the payment of a debt or performance of some other obligation. The owner of the property, who grants the lien, is referred to as the lienee and the person who has the benefit of the lien is referred to as the lienor or lien holder. The etymological root is Anglo-French lien or loyen, meaning "bond", "restraint", from Latin ligamen, from ligare "to bind".
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