A mere consent is not enough for a valid contract. One of the essentials of a valid contract mentioned in Section 10 is that the parties should enter into the contract with their free consent. Section 13 defines consent as, Two or more persons are said to consent when they agree upon the same thing in the same sense that is consensus ad idem. In other words, there must be real consent, in the absence of which there is no contract formed. When there is no consent, the agreement is void.
However, in certain cases there is real consent, but one of the parties has given his consent not out of his free will but due to factors in the absence of which he might not have given his consent. Consent so given is said to be not free. In such cases, the contract is voidable.
According to Section 14, consent is said to be free when it is not caused by-
Consent is said to be so caused when it would not have been given but for the existence of such coercion, undue influence, fraud, misrepresentation or mistake. Where consent to an agreement is caused by coercion, undue influence, fraud or misrepresentation, the agreement is a contract voidable at the option of the party whose consent was so caused. If, for example, a person is induced to sign an agreement by fraud, he may, on discovering the truth, either uphold the contract or reject it. Where consent is caused by mistake, the agreement is void, A void agreement is not enforceable at the option of either party.
Examples of No free consent