20. –
(1) Any mistake in any document received from the Director of Savings in pursuance of these Regulations shall, as soon as practicable, be notified in writing to the Director of Savings by the person receiving the document.
(2) If the Director of Savings is satisfied that any transaction effected or thing done, or purporting to have been effected or done, in accordance with these Regulations has been effected or done in error, he may cancel the transaction and may take all such steps as are, in his opinion, necessary to rectify the error, and may for that purpose require the surrender to him of any certificate or other document.