The directive comes after recent instructions to the trading members to obtain and update the mobile numbers and email-ids of their clients who have transacted during 2014-15, in UCC (Unique Client Code) database by month-end.
"The trading members having their own website are advised to ensure the display of the ticker message on their website latest by September 10, 2014," National Stock Exchange (NSE) said in a circular.
Last month, NSE had asked trading members to display ticker message on their website at a prominent place for updation of mobile numbers and e-mail id of their clients.
In case certain investors do not have mobile numbers/ email id or do not wish to provide the same, the trading members would have to report such cases to the bourses.
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The move followed complaints against brokers and other market entities conducting transactions through accounts of their clients without the knowledge of the investor concerned.