"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" "KYC is one time exercise while dealing in securities markets - once KYC is done through a SEBI registered intermediary (broker, DP, Mutual Fund etc.), you need not undergo the same process again when you approach another intermediary."