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.
Prevent Unauthorized Transactions in your trading and/or demat account --> Update your Mobile Number and / or email IDs with your Stock Broker and / or Depository Participant. Receive alerts on your Registered Mobile for all debit and other important transactions in your demat account directly from CDSL on the same day / information of your transactions directly from Exchange on your mobile/email at the end of the day......................issued in the interest of investors.
SEBI Notification :- "No need to issue cheques by investors while subscribing to IPO. Just write the bank account number and sign in the application form to authorize your bank to make payment in case of allotment. No worries for refund as the money remains in investor's account."