"Prevent unauthorised transactions in your account --> Update your mobile numbers/email IDs with us. Receive information of your transactions directly from Exchange on your mobile/email at the end of the day ..! ........ Issued in the interest of Investors" "No need to issue cheques by investors while subscribing to IPO. Just write the bank account number and sign in the application form to authorise your bank to make payment in case of allotment. No worries for refund as the money remains in investor's account."