Utah Unilateral mistake is a type of mistake which is caused by one party in a contract, resulting in the other party suffering a loss. This type of mistake is recognized in Utah contract law, and it can be used in certain situations to void a contract. Common types of Utah Unilateral mistake include mistake of fact, mistake of law, and mistake of value. A mistake of fact occurs when a party mistakenly believes something to be true which is actually false. A mistake of law occurs when a party misinterprets the applicable law. A mistake of value occurs when a party mistakenly believes something to be of a different value than it actually is. In order for a unilateral mistake to be recognized, the mistake must be material to the contract, and the other party must not have known of the mistake at the time of the contract formation. If these requirements are met, then the affected party may be able to void the contract due to the mistake.