Mortgage interest and interest on securities are two similar concepts, both related to a guarantee created to obtain debt from one party to another. They operate in the same way, both granting the insured party preferential rights when making the assets concerned available. The fundamental difference is that mortgages are a traditional way of guaranteeing common law bonds, which are generally used in real estate transactions. On the other hand, a security interest is a legislative creation, namely the instrument for safeguarding obligations that are generally created as part of a commercial transaction under the single code of trade. The ultimate purpose of both the mortgage and the security officers is the same, the holder of the guarantee/mortgage is allowed to freely transfer the property subject to the agreement in order to settle the debt that such an instrument guarantees. The process of executing claims by forfeiture of property secured by a mortgage is called enforcement. The procedure is to recover the outstanding loan from Mortgagor, which put the loan in default by imposing the sale of the asset. In most U.S. states, the trust deed is the legal document that technically granted the mortgage holder the guarantees. This process also applies to more complex transactions, in which the mortgage is placed to guarantee a financial instrument, namely a debt security.