Any promise and any series of promises that constitute the counterpart are an agreement. The promise is nothing more than an offer or proposal of one of the parties and the acceptance of it by the other party. In other words, to enter into an agreement, there should be I) offer II) acceptance and III) consideration. All agreements enforceable by law are a contract. In other words, only these agreements become a contract that is legally enforceable or that constitutes a legal obligation. There are therefore two essential elements of the Treaty: (I) Agreement (II) applicability by law. Most of the principles of the Common Law of Contracts are described in the Restatement of the Law Second, Contracts published by the American Law Institute. The Single Commercial Code, the original articles of which have been reproduced in almost all countries, is a legal right that governs important categories of contracts. The main articles dealing with contract law are Article 1 (General provisions) and Article 2 (sales). Article 9 Sections (Secured Transactions) govern contracts that assign payment entitlements in security interest rate agreements.
Contracts relating to certain activities or activities may be heavily regulated by state and/or federal laws. See the law on other topics that deal with certain activities or activities. In 1988, the United States acceded to the United Nations Convention on Contracts for the International Sale of Goods, which now governs treaties within its scope. In the same way, a person of an unhealthy mind, that is. who, at the time of consent, is not in a position to make a rational judgment, invalidates such an agreement with a person with an unhealthy mind. Thus, an agreement with a person who is usually of sound mind, but sometimes of unhealthy mind, leads to a valid contract if a person was in good health at the time of entering into the contract. The burden of proof that the person was not sound at the time the contract was concluded lies with the applicant. Not all agreements are necessarily contractual, as it is generally to be considered that the parties intend to be legally bound. A “gentlemen`s agreement” is an agreement that is not legally applicable and must be “only honorably binding”.    Each Contracting Party must be a “competent person” with legal capacity. The parties may be natural persons (“individuals”) or legal persons (“limited communities”). An agreement is reached when an “offer” is accepted.
The parties must intend to be legally bound; and, to be valid, the agreement must have both an appropriate “form” and a legitimate purpose. In England (and in jurisdictions that apply English contractual principles), parties must also exchange “considerations” to create “reciprocity of engagement,” as in simpkins v Country.  An English common law concept, consideration is necessary for simple contracts, but not for special contracts (contracts per act). . . .