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Illegality: The agreement itself is illegal or violates public policy.
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Unconscionability: The agreement is so one-sided that it shocks the conscience of the court.
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Mental incapacity or incompetence: One of the parties had a mental illness or incapacity at the time of contract formation.
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Party was a minor: A party was not of legal age (younger than 18 years).
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Fraud: A party made an affirmative misrepresentation or failed to disclose something that he or she was required to disclose.
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Duress: One party made an unlawful threat to the other, giving that person no reasonable alternative but to enter into the contract.
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Undue influence: A dominant party used an inappropriate method of persuasion to convince a weaker or more vulnerable party to enter into a contract against his better judgment.
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Mistake: The parties entered into the agreement with a belief that was not in accord with the facts, and the belief goes to a basic assumption of the contract and is material.
