When you sell shares, the securities have to be debited from your demat account. TPIN and e-DIS are how you authorise that debit yourself — with a PIN issued directly to you by CDSL — instead of granting your broker a Power of Attorney over the account.
Historically, brokers took a Power of Attorney over the client's demat account so they could debit shares when a sale executed. That is a broad, standing authority. TPIN and e-DIS replace it with a narrow one: you authorise each debit, with a PIN that CDSL issues to you directly and that your broker never sees.
| Power of Attorney | TPIN / e-DIS | |
|---|---|---|
| Who holds the authority | The broker, standing | You, per transaction |
| Scope | Broad and continuing | The specific quantity you authorise |
| Who issues the credential | — | CDSL, directly to you |
| Broker can see it | n/a | No |
| Revoking it | Requires formal revocation | Simply stop authorising |
If you do not complete this step, the sale cannot be settled and may result in a short delivery with the associated auction penalty — so authorise promptly rather than leaving it until the end of the day.
Pre-authorisation lets you authorise a quantity of a particular security in advance, before the sale executes. When the order fills, the debit is already covered and no further OTP step is needed at that moment.
It is worth using if you place orders you cannot supervise — for example an order that may execute while you are travelling or otherwise unable to complete an OTP. The authorisation is still limited to the security and quantity you nominated, so it is not equivalent to a POA.
| Problem | What to do |
|---|---|
| OTP not received | The OTP goes to the contact details on your DEMAT account, not your trading account. Update them with ATS if they are stale. |
| Forgot TPIN | Regenerate it from the CDSL page. The new TPIN replaces the old one. |
| TPIN rejected | Confirm you are entering the CDSL TPIN, not your trading password. Repeated failures may temporarily lock the attempt. |
| Authorisation page will not load | It is a CDSL-hosted page. Disable pop-up blocking for it and retry; if it persists, raise a ticket. |
Still stuck? Raise a ticket or write to dp@adityatrading.com.
TPIN is a 6-digit PIN issued by CDSL that you use to authorise the debit of shares from your demat account when you sell. It is generated directly by CDSL and sent to the mobile number and email registered with your demat account — your broker never sees it.
e-DIS (electronic Delivery Instruction Slip) is the electronic replacement for the paper slip you used to sign to release shares. When you sell, you authorise the debit with your TPIN and an OTP instead of submitting a physical slip or having given a Power of Attorney.
You generate the TPIN once. After that you enter that same TPIN plus a fresh OTP each time you authorise a sale. If you forget it, you can regenerate it — the new one replaces the old.
Pre-authorisation lets you authorise a quantity of a specific stock in advance, so that when the sale executes the debit does not need a separate authorisation at that moment. It is useful if you place orders when you may not be able to complete an OTP step.
No. Your trading password logs you into the ATS platform. TPIN authorises the depository to move shares out of your demat account. They are issued by different parties — the broker and CDSL respectively — and should never be the same value.
No. TPIN/e-DIS exists precisely so you do not have to give a POA over your demat account. SEBI has moved the market towards this model so that authority to debit sits with you, per transaction, rather than being granted broadly in advance.
The OTP goes to the mobile number and email registered with your demat account, not your trading account. If those are out of date, update them with ATS — until then the OTP will keep going to the old contact.
No, and no one at ATS will ever ask you for it. TPIN is issued by CDSL directly to you. That separation is the security property — treat any request for your TPIN as fraudulent.
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