Every time you sell shares from your portfolio, you must give your broker instructions in the form of a Delivery Instruction Slip (DIS). Because mailing a paper slip for each sell transaction is impractical, a POA is used to collect delivery instructions instead of a physical form.

If you sell from your holdings, the depositories now allow stockbrokers to obtain online DIS permission using a PIN and OTP (provided to the registered mobile number). You can use this approach to authorize your sell transactions if you revoke your POA.
This form, like the POA, must be physically collected. You can fill it out, sign it, and submit it to our headquarters.

Note:
Once we get the form, it may take up to 5 working days to process the request.
For the time being, POA revocation is only possible for residents. You will not be able to use the TPIN facility if you have a non-individual (i.e. HUF, company, or corporate) account until CDSL allows it.