File 1

 Section 20 in The Indian Contract Act, 1872

20. Agreement void where both parties are under mistake as to matter of fact.—Where both the parties to an agreement are under a mistake as to a matter of fact essential to the agreement the agreement is void. Explanation.—An erroneous opinion as to the value of the thing which forms the subject-matter of the agreement, is not to be deemed a mistake as to a matter of fact. Illustrations