This document discusses the concept of free consent in contracts. It explains that a contract without free consent is voidable. Consent can be vitiated by coercion, undue influence, misrepresentation, or mistake. Coercion involves threatening unlawful acts, while undue influence involves exploiting a power imbalance. Fraud involves intentional misrepresentation, while misrepresentation can be innocent. There are also discussions around bilateral and unilateral mistakes and how they impact contracts. Specific cases are referenced to illustrate these concepts of vitiating factors for free consent.