Contract theory is the text that deals with normative and conceptual issues in contract law. One of the most important questions in contract theory is why contracts are applied. An important answer to this question focuses on the economic benefits of implementing bargains. Another approach, associated with Charles Fried, asserts that the purpose of contract law is to impose promises. This theory was developed in the book Fried Contract as Promise. Other approaches to contract theory can be found in the writings of critical lawyers and lawyers. Offer and acceptance are the purpose of the agreement between the parties. A public relations company offers to make its services available to a potential customer. An electrician proposes wiring a new home. A photographer agrees to photograph a wedding. Each contracting party must be a “competent person” with the force of law.
The parties may be individuals (“individuals”) or legal entities (“companies”). An agreement is reached if an “offer” is adopted. The parties must intend to be legally connected; and to be valid, the agreement must have both a correct “form” and a legitimate purpose. In England (and in jurisdictions using the principles of the English treaty), the parties must also exchange “counterparties” to create a “reciprocity of engagement,” as in Simpkins/Country.  The first part of a business contract covers the parties. Part of it is usually the company that pays for a particular product or service. For example, a small company could hire a marketing consulting firm to help it market a new product line. An owner or manager usually takes his or her name in place of the recipient.
The other part is the service company or the provider. This independent representative or businessman is the one expected of him to complete the work or to supply the products. Duress has been defined as a “threat of harm that is made to force a person to do something against his will or judgment; esp., an illegitimate threat made by one person to force a manifestation of another person`s apparent consent to a transaction without real will.  An example is Barton v Armstrong  in a person who has been threatened with death if he does not sign the treaty. An innocent party wishing to impose a contract of coercion on the person only has to prove that the threat was made and that it was one of the reasons for entering the contract; the burden of proof then rests with the other party to prove that the threat had no effect on the performance of the contract by the party. There may also be constraints on goods and sometimes “economic constraints.” The court reads the treaty as a whole and according to the ordinary meaning of the words. In general, the importance of a contract is determined by the consideration of the intentions of the parties at the time of the creation of the contract. If the intent of the parties is not clear, the courts are attentive to any habit and use in a particular store and in a particular land scheme that could help determine intent. In the case of an oral contract, the courts may determine the intention of the parties taking into account the circumstances of the contractualization and the conduct of the cases between the parties. When a party files an action in which it alleges a breach of contract, the judge must first respond to the existence of a contract between the parties. The complainant must demonstrate four elements to demonstrate the existence of a contract: recitals are a form of optional contract. Their purpose is to provide the context of the agreement. They often indicate the parties` general understanding of the situation and its purpose or intent at the conclusion of this agreement.