Section 22 of Indian Contract Act
22. Contract caused by mistake of one party as to matter of fact.— A contract is not voidable merely because it was caused by one of the parties to it being under a mistake as to a matter of fact.
22. Contract caused by mistake of one party as to matter of fact.— A contract is not voidable merely because it was caused by one of the parties to it being under a mistake as to a matter of fact.