(1) A declaration of intention made by fraud or duress may be voidable.
(2) If a third person has been guilty of fraud or duress in respect to a declaration of intention made to any other party, such declaration of intention may be voidable only where the other party was aware, or should have been aware, of the fact.
(3) The voidance of a declaration of intention under the preceding two paragraphs cannot be set up against a third person acting in good faith.