Under Indian Contract Act, when consent is obtained by coercion, undue influence, fraud, misrepresentation, or mistake, the agreement is VOID (not voidable). Void agreements have no legal effect from the beginning. This is different from voidable contracts where the aggrieved party can choose to affirm or rescind. Section 19 specifically covers voidable agreements for misrepresentation etc., but Section 23 deals with void agreements for considerations/objects forbidden by law.