By allowing this defence of errors, misunderstandings and misrepresentations, contract law is intended to protect the parties from agreements that have never linked them. These are consistent with the general objectives of contract law, which are to protect the reasonable expectations of sensible people. In general, unilateral errors are much more common than other types of contractual errors, such as . B a reciprocal error (i.e. an error shared by both parties). A unilateral error may be made with respect to one of the terms or provisions of a contract. For most unilateral errors, this is a party that wrongly adopts the definition of a sentence or word in the parties` contract. If you find that a unilateral error has been made with respect to the terms of your contract, you may have a number of corrective actions. To find out what these remedies are and which ones are best suited to your cause, it may be in your best interest to contact a local lawyer. A “basic presumption” is an assumption that deals with an essential fact of the agreement. Wrong beliefs must have such a strong influence on trade that the imbalance is such that it would be unfair to apply the treaty.  For example, at Renner v.
Kehl, two vendors decided to sell leases on 2,000 hectares of undated land near Yuma, Arizona. The sellers were approached by a buyer who wanted to rent the land for the cultivation of Jojoba (ha-ho`ba), a shrub whose seeds produce precious oil, in the countryside. The country seemed perfect for commercial production of jojoba. Both sides believed that there was enough water under the country that could maintain commercial production of jojoba. After the contract was signed, the parties found that there was not enough water to maintain these agricultural activities and the buyer therefore wanted to cancel the contract. The contract was cancelled because both parties in principle concluded that there was sufficient water to maintain production. The acceptance had a significant effect on the contract, as the parties entered into the contract only on the assumption that the purchaser could cultivate Jojoba on the land.  Treaty reform is a fair remedy that alters the language of the contract so that it is consistent with the agreement actually reached by the parties, but which, because of an error, is not strictly reduced to the letter.