CDSL TPIN and e-DIS: Authorising the Sale of Your Shares
Published 2026-10-16 · Aadarna Stock Broking Pvt. Ltd.
Key takeaways
- TPIN is a PIN issued by CDSL that you use to authorise debits of shares from your demat account.
- e-DIS is the online authorisation you complete with your TPIN and an OTP when you sell without DDPI.
- You can generate or reset your TPIN yourself through CDSL's process, usually from your broker's app.
- Never share your TPIN or OTP; no genuine broker or Authorised Person will ask for them.
If your demat account is with a Depository Participant on CDSL, you will meet the TPIN the first time you sell shares without having given DDPI. It is a safety step: shares cannot leave your demat account until you approve them yourself. This guide explains how it works.
What is a TPIN?
TPIN is a PIN issued by CDSL, the depository, to demat account holders. It is linked to your demat account, not to your broker's login. Its only job is to confirm that you authorise shares to be debited from your demat account.
Think of it like the PIN for your debit card: your broker's app is the shop, but the TPIN is checked by CDSL itself.
What is e-DIS?
Before electronic authorisation, investors signed paper Delivery Instruction Slips to move shares out of their demat account. e-DIS is the electronic version. When you sell, you are taken to a CDSL authorisation page where you:
- See the shares and quantity to be authorised.
- Enter your TPIN.
- Enter the OTP sent by CDSL to your registered mobile number or email.
- Confirm. The authorisation then covers those shares for settlement of your sale.
If you have given DDPI to your broker, you usually will not need e-DIS for normal sales, because DDPI already authorises debits for settling your own sales.
How to generate or reset your TPIN
CDSL sends a TPIN when your demat account is opened, and you can generate or reset it whenever you need to. Most broker apps have a link to the CDSL TPIN page in the sell or holdings section. The general steps are:
- Open the TPIN generation link from your broker's app, or go to the CDSL website.
- Enter your demat account details and PAN as asked.
- Verify with the OTP sent to your registered mobile number or email.
- Set a new TPIN of your choice.
If you are not receiving OTPs, your mobile number or email may not be updated with your Depository Participant. Update them first.
Keeping your TPIN safe
- Never share your TPIN or OTP with anyone, including people claiming to be from your broker, an Authorised Person, CDSL or a bank.
- Do not write your TPIN in your phone notes or share screenshots of the authorisation page.
- If you receive an OTP for a sale you did not place, do not enter it anywhere. Contact your broker straight away.
- Change your TPIN if you think anyone else may know it.
A common fraud is a caller who claims to be helping you, then asks for an OTP. With your TPIN and OTP, a fraudster who has access to your trading login could move your shares. No genuine intermediary needs these from you.
Why this extra step is worth it
Entering a TPIN and OTP for every sale can feel slow, but it gives you direct control. Shares can be debited from your demat account only when you, or a DDPI you signed, allow it. Even someone who learns your trading app password cannot move your shares without these.
That is also why fraudsters try so hard to get OTPs. Treat every request for your TPIN or OTP, by phone, message or email, as a warning sign.
Common problems and fixes
- Forgot TPIN: reset it through the CDSL process described above.
- OTP not received: check that your mobile number and email are updated with your Depository Participant.
- Sale failed after authorisation: check whether the authorised quantity matched the quantity you sold, and contact your broker with the order details.
Frequently asked questions
Is the TPIN the same as my trading app password?
No. Your app password logs you into your broker's platform. Your TPIN is issued by CDSL and only authorises debits from your demat account.
Do I need a TPIN if my account is with NSDL?
TPIN is a CDSL process. Accounts on NSDL have their own authorisation process. Your broker will show you the correct steps for your depository.
Can my Authorised Person enter the TPIN for me?
No. You should enter your TPIN and OTP yourself. Never share them with anyone, including your Authorised Person.