Contracts are mainly subject to legal and common (judicial) and private law (i.e.dem private contract). Private law first includes the terms of the agreement between the parties exchanging promises. This private right can repeal many of the rules otherwise established by state law. Legal broadcasting laws, such as the Fraud Act, may require certain types of contracts to be executed in writing and with special formalities in order for the contract to be enforceable. Otherwise, the parties can enter into a binding agreement without signing an official written document. For example, the Virginia Supreme Court in Lucy v. Zehmer, that even an agreement on a piece of towel can be considered a valid contract if the parties were both sane, and showed mutual consent and consideration. For the weighing to be properly taken into account, it must be of some value, even if it is minimal. It is not necessary for the economic counterpart to match the original promise. Nominal consideration is sufficient in return for a contract, the courts will not measure the adequacy of the consideration, since it is up to the parties to decide the subjective value of each promise. This only applies if the debtor has not re-considered the promise. The following, mentioned in pinnel`s case,[24] and confirmed by Sibree v. Tripp,[31] may be a new counterparty: However, in certain circumstances, certain promises that are not considered contracts may be applied to a limited extent.

If one party relied on the other party`s assurances/promises to its detriment, the court may apply a just doctrine of Promissory Estoppel to compensate the non-injurious party to compensate the party for the amount it received from the appropriate appeal of the party to the agreement. There are many exceptions to reciprocity. Some of them are real exceptions, while others seem to be exceptions only at first glance. We will follow a few of them one after the other. There is no appropriate requirement for reflection to pass to the promisor. Thus, the commitment can be taken into account by an act (for example. B, the waiver of a non-applicable contract is a contract that is not applicable due to a certain functioning of the law). For example, most contracts between adults and minors under the age of 18 cannot be applied by adults against minors. The contract is non-conclusive. Since the minor is not bound, the promise has the effect of being illusory. Nevertheless, the contract may be applied by the minor against the adult, even if the minor is not bound by a contract under the applicable law.

This is an exception to the reciprocity rule of consideration. In Eastwood v Kenyon, a girl`s caretaker has arranged a loan to educate the girl and improve her chances of marriage. After her wedding, her husband promised to repay the loan.