Any mistake in any document received from the Director of Savings inpursuance of these Regulations shall, as soon as practicable, benotified in writing to the Director of Savings by the person receivingthe document.

If the Director of Savings is satisfied that any transactioneffected or thing done, or purporting to have been effected or done, inaccordance with these Regulations has been effected or done in error, hemay cancel the transaction and may take all such steps as are, in hisopinion, necessary to rectify the error, and may for that purposerequire the surrender to him of any certificate or other document.