On the other hand, if we are only talking about an agreement between two people, that we do not sign anything, a tacit and tacit contract, also known as a “contract by the parties”, which can be either a tacit contract or a tacit contract, can also be legally binding. In the case of unspoken contracts, these are real contracts for which the parties enjoy the “benefit of the good deal”.  However, legally underlying contracts are also called quasi-contracts and the remedy is quantum, the fair value of the goods or services provided. In a limited number of cases, an agreement is not applicable unless it is consistent with a specified legal form. While contracts can generally be concluded without formalities, it is assumed that some transactions require form, either because it causes a person to think carefully before committing to an agreement, or only as clear evidence.  This generally applies to large commitments, including the sale of land, of a lease of real estate for more than three years of a consumer credit contract and a change.  A guarantee contract must also be proven in writing at a given time.  Finally, English law assumes that a free promise is not legally binding in terms of contract law. While a gift that is delivered is irrevocably transferred to the property, and while someone can always attach himself to a promise, without rendering anything, to deliver something in the future, if he signs an act that is attested, a simple promise to do something in the future can be revoked. This result is achieved with some complexity by a specificity of English law, called the doctrine of consideration. In colonial times, the concept of consideration was exported to many common law countries, [who?], but it is unknown in Scotland and in civil courts.
 Systems based on Roman law do not ask for consideration and do not recognize them, and some commentators have suggested abandoning reflection and replacing it as the basis for contracts.  However, legislation, not judicial development, was seen as the only way to eliminate this entrenched doctrine. Lord Justice Denning said, “The doctrine of consideration is too strong to be toppled by a side wind.”  In the United States, the focus has been on the negotiation process, as illustrated by Hamer v. Sidway (1891). Skills differ in their principles of contractual freedom. In common law laws such as England and the United States, a high degree of freedom is the norm. In U.S. law, for example, it was adopted in Hurley v.