The parties are often under pressure to reach an agreement quickly and can therefore use a later agreement to «achieve the agreement». Morris illustrates the risks associated with this approach and how saving time in development can lead to costly legal disputes that can be extremely troublesome for a company, especially if the party wants to rely on the concept in question. Some arbitration clauses are unenforceable and, in other cases, arbitration may not be sufficient to resolve a dispute. For example, disputes over the validity of registered intellectual property rights may be settled by a public body within the national registration system.  In the case of matters of significant public interest that go beyond the narrow interests of the parties to the agreement, such as allegations that a party breached a contract by committing unlawful anti-competitive conduct or committing civil rights violations, a court may find that the parties may assert one or all of their rights before contracting out.  The applicant commenced proceedings and argued that he was entitled to «additional time for the payment of additional compensation under the GSO». The applicant pointed out that the wording used in the GSO (i.e. «having the opportunity») was binding. The defendant argued that it was not required to grant an extension to the applicant, since the provision is a non-applicable agreement and an agreement must be reached.
The defendant also argued that, although it was not required to react reasonably to the extension proposed by the applicant, it had in any case acted reasonably in rejecting it. Oral agreements are based on the good faith of all parties and can be difficult to prove. In certain circumstances, an unspoken contract may be established. A contract is implied when the circumstances imply that the parties have entered into an agreement when they have not expressly done so. For example, John Smith, a former lawyer, can implicitly enter into a contract by going to a doctor and being examined; If the patient refuses to pay after the examination, the patient has broken an implied contract. A contract implied by law is also called quasi-contract because it is not actually a contract; Rather, it is a means for the courts to remedy situations in which one party would be unfairly enriched if it were not obliged to compensate the other. The Quanten Meruit claims are an example. Under these conditions, the original contract often contains a provision under which the parties indicate that they intend to enter into a new agreement in the future. Sometimes these provisions define detailed mechanisms for this purpose, whereas sometimes they can only be one or two sentences. This approach buys the parties time to build trust, develop the products or processes that are marketed on the line, and establish the reasons and commercial conditions for each subsequent engagement. 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.  The use of the word «option,» that is, a right contrary to the obligation to provide, did not help the applicant, who was still too uncertain to apply.