If the contractual terms are uncertain or incomplete, the parties do not reach an agreement in the eyes of the law.  An agreement is not a contract and the inability to agree on key issues that may include price or security elements may lead to the failure of the entire contract. However, a court will endeavour to implement commercial contracts where possible by excluding an appropriate design of the contract.  In New South Wales, even if a contract is uncertain or incomplete, the contract may remain binding on the parties if a sufficiently secure and comprehensive clause requires the parties to submit to arbitration, negotiation or mediation.  An agreement between private parties that creates reciprocal obligations that can be imposed by law. The fundamental elements necessary for the contract to be a legally enforceable contract: mutual consent, expressed by a valid offer and acceptance; Appropriate consideration Capacity and legality. In some states, the counterparty element can be filled in with a valid replacement. Possible remedies in the event of a breach of contract are general damages, consequential damages, damages and specific benefits. An oral contract can also be characterized as a parol contract or an oral contract, a “verbal” signing “spoken” and not “in words,” a use established in British English in terms of contracts and agreements and, more generally, in American English, abbreviated as “cowardly”.  An exception arises when advertising makes a unilateral promise, such as offering a reward, as decided in the famous case of Carlill v Carbolic Smoke Ball Co, in 19th century England. The company, a pharmaceutical manufacturer, proposed a smokeball that, if it sniffed “three times a day for two weeks,” would prevent users from catching the “flu.” If the smokeball does not prevent “the flu, the company promised that it would pay $100 to the user, adding that they deposited “$1000 in the Alliance bank to show our sincerity in the file.” When Ms. Carlill complained about the money, the company argued that the complaint should not be considered a serious and legally binding offer; instead, it was a “simple mess”; However, the Court of Appeal found that Carbolic had made a serious offer to a reasonable man and found that the reward was a contractual undertaking.
When a obligation comes into effect, contracts arise on the basis of a commitment from one of the parties. To be legally binding as a treaty, a promise must be exchanged for an appropriate consideration. There are two different theories or definitions of consideration: the theory of bargains of consideration and the theory of utility-detriment of consideration. Failure to comply with insurance conditions may be an offence. Insurance hires you and your insurer. An insurer is required to pay a guaranteed fee. If the insurer resigns to this obligation, you can sue the insurer for default. 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.  A contract is a legally binding document between at least two parties, which defines and regulates the rights and obligations of the parties to an agreement.  A contract is legally enforceable because it complies with the requirements and approval of the law.