A contract of sale is a contract between the parties for the sale of a particular good or property. A sale is usually a transfer of ownership of property from one person to another for a set value. In such a sale, there is always a contract that is established. Often, when the sale of goods is practically cheap, the contract is concluded by gesture and by the will of the parties to make an exchange of goods for money. But if the parties make a deal for a more expensive cause like machinery, vehicles, and other similar things, the usual laws of countries require that the treaty be written in accordance with the law or a well-known legal jargon, the so-called fraud law. . . .