The term mortgage refers to the legal device used in securing the property, but it is also commonly used to refer to the debt secured by the mortgage, the mortgage loan.

In most jurisdictions mortgages are strongly associated with loans secured on real estate rather than other property and in some cases only land may be mortgaged. Arranging a mortgage is seen as the standard method by which individuals or businesses can purchase residential or commercial real estate without the need to pay the full value immediately. See mortgage loan for residential mortgage lending, and commercial mortgage for lending against commercial property.

In many countries it is normal for home purchases to be funded by a mortgage. In countries where the demand for home ownership is highest, strong domestic markets have developed, notably in Spain, the United Kingdom and the United States.

Participants and variant terminology
Each legal system tends to share certain concepts but vary in the terminology and jargon they use.

In general terms the main participants in a mortgage are:

Creditor
The creditor has legal rights to the debt secured by the mortgage and often makes a loan to the debtor of the purchase money for the property. Typically, creditors are banks, insurers or other financial institutions who make loans available for the purpose of real estate purchase.

A creditor is sometimes referred to as the mortgagee or lender.

Debtor
The debtor[s] must meet the requirements of the mortgage conditions (and often the loan conditions) imposed by the creditor in order to avoid the creditor enacting provisions of the mortgage to recover the debt. Typically the debtors will be the individual home-owners, landlords or businesses who are purchasing their property by way of a loan.

A debtor is sometimes referred to as the mortgagor, borrower, or obligor.

Other participants
Due to the complicated legal exchange, or conveyance, of the property, one or both of the main participants are likely to require legal representation. The terminology varies with legal jurisdiction; see lawyer, solicitor and conveyancer.

Because of the complex nature of many markets the debtor may approach a mortgage broker or financial adviser to help them source an appropriate creditor typically by finding the most competitive loan. Recently, many US consumers are choosing to work with Certified Mortgage Planners, industry experts that work closely with Certified Financial Planners to align the home finance positions of homeowners with their larger financial portfolio.

The debt is sometimes referred to as the hypothecation, which may make use of the services of a hypothecary to assist in the hypothecation.

In addition to borrowers, lenders, government sponsored agencies, private agencies; there is also a fifth class of participants who are the source of funds - the Life Insurers, Pension Funds, etc.