Attention Investors: "Prevent unauthorised transactions in your account --> Update your mobile numbers/email IDs with your stock brokers. Receive information of your transactions directly from Exchange on your mobile/email at the end of the day.......... Issued in the interest of Investors". "Prevent unauthorised Transactions in your demat account --> Update your Mobile Number with your Depository Participant. Receive alerts on your Registered Mobile for all debit and other important transactions in your demat account directly from NSDL on the same day.......... Issued in the interest of Investors"