Covenant – this term refers to a written document in which signatories either commit themselves to do a certain legal actions, not to do a certain legal action or in which they agree on a certain set of facts. They are very common in real estate deals and are used to restrict land use such as amongst shopping mall tenants or for the purpose of preserving heritage property. For example, a coventor to a mortgage commits themself to pay the mortgage if the mortgagor defaults.