A defeasance, or defeazance (Fr. défaire, to undo), in law, is an instrument which defeats the force or operation of some other deed or estate; as distinguished from a condition— that which in the same deed is called a condition is a defeasance in another deed. Law is a system of rules enforced through a set of Institutions used as an instrument to underpin civil obedience politics economics and society A deed is a Legal instrument used to grant a Right. Deeds are part of the broader category of documents under seal. An estate is the Net worth of a person at any point in time It is the sum of a person's Assets - legal rights interests and entitlements to Property of A defeasance should recite the deed to be defeated and its date, and it must be made between the same parties as are interested in the deed. It must be of a thing defeasible, and all the conditions must be strictly carried out before the defeasance can be consummated.
Defeasance in a bill of sale is the putting of an end to the security by realizing the goods for the benefit of the mortgagee. A bill of sale is a Legal document made by a 'seller' to a purchaser, reporting that on a specific date at a specific locality and for a particular sum of Money It is not strictly a defeasance, because the stipulation is in the same deed; it is really a condition in the nature of a defeasance.