For a unilateral mistake to make a contract voidable,either (1)the nonmistaken party must have caused or had reason to know of the mistake or (2)enforcement of the contract must be unconscionable.

Unilateral Mistake

A situation where only one party to a contract is mistaken about the terms or subject-matter contained in that contract.

Voidable

A term describing a contract or agreement that can be legally declared invalid by one or more of the parties involved.

Unconscionable

Describes an agreement that is so unjust or overwhelmingly one-sided in favor of one party that it is deemed unenforceable under the law.