TPIN on WebNotes

CDSL TPIN regime (eDIS)

Wed, 20 May 2026 00:00:00 +0000

The CDSL TPIN (Transaction PIN) regime, also known as eDIS (electronic Delivery Instruction Slip), is the authorisation framework that allowed CDSL demat-account holders to authorise sell orders electronically using a one-time PIN, replacing the physical DIS slip system. It was the dominant authorisation mechanism for retail sell orders for several years before being progressively replaced by the CDSL block mechanism .

What TPIN is

TPIN is a 6-digit PIN issued to the demat account holder by CDSL. It serves as the holder’s electronic signature for delivery authorisation.

How to generate CDSL T-PIN on Zerodha

Wed, 20 May 2026 00:00:00 +0000

For Zerodha clients on CDSL-side demat accounts, T-PIN is typically generated automatically during onboarding. If you didn’t receive a T-PIN, or never set one up, you can generate one via the CDSL myeasi portal .

Conflict-of-interest disclosure. This guide is published by the WebNotes Editorial Team for informational purposes and is written independently. WebNotes operates a Zerodha account-opening referral programme, disclosed on the pages that carry the referral link; this guide does not carry it and earns no referral commission from the procedure described here.

How to recover a forgotten CDSL T-PIN on Zerodha

Wed, 20 May 2026 00:00:00 +0000

A forgotten CDSL T-PIN is a common issue when a Zerodha client tries to sell CDSL-held shares and cannot complete the eDIS T-PIN + OTP flow . The recovery is straightforward via CDSL myeasi .

How to regenerate CDSL T-PIN

Wed, 20 May 2026 00:00:00 +0000

Regenerating a CDSL T-PIN is the standard recovery / refresh procedure used when you’ve forgotten your current T-PIN, suspect it might be compromised, or simply want a new one. The flow is the same as the “forgot T-PIN” recovery.

TPIN preauthorisation on Zerodha

Wed, 20 May 2026 00:00:00 +0000

TPIN preauthorisation is a one-time consent mechanism (similar to DDPI) that allows a Zerodha client to authorise the broker in advance for sells, eliminating the per-trade T-PIN entry. Historically this was an alternative to the per-trade T-PIN + OTP eDIS flow ; now largely superseded by DDPI and the CDSL block mechanism .

What preauthorisation provided

Pre-2024: Without preauthorisation, every sell of a CDSL-held share required the user to enter T-PIN + OTP. For active traders this was significant friction.

Validity of CDSL T-PIN

Wed, 20 May 2026 00:00:00 +0000

The CDSL T-PIN does not have a hard expiry. Once issued by CDSL, it remains valid indefinitely until:

You regenerate it (which invalidates the previous T-PIN).
CDSL resets it (rare; typically only for security incidents).
Your demat account is closed.

This article clarifies the lifecycle, the recommended refresh cadence, and the edge cases.

No automatic expiry

CDSL T-PIN is a permanent credential by default. Unlike OTPs (which expire in minutes) or session passwords (which expire in months), T-PIN is intended to persist for the lifetime of the demat account.

Zerodha eDIS T-PIN OTP

Wed, 20 May 2026 00:00:00 +0000

The Zerodha eDIS T-PIN + OTP flow is the dual-factor authorisation used (historically and in residual cases) for selling CDSL-held shares without a physical DIS slip. The flow combines the holder’s CDSL T-PIN (a 6-digit transaction PIN) with a one-time password (OTP) sent to the registered mobile, providing strong authentication.

How the flow works

When you place a sell order on Zerodha Kite for CDSL-held shares (in cases where eDIS is still used):

SEBI margin pledge rules (September 2020 framework)

Mon, 18 May 2026 00:00:00 +0000

Margin pledge is the mechanism by which an investor uses securities held in their own demat account as collateral for trading margin, by creating a pledge in the broker’s favour at the depository (CDSL or NSDL ) instead of transferring the securities to the broker. The securities stay in the investor’s account with a pledge flag set, and the broker re-pledges them to the clearing corporation to generate collateral margin against the investor’s futures and options positions. It is a charge over the securities, not a loan or a sale; the investor keeps ownership, dividends, and bonus entitlements throughout.

How to fix a DP-related sell rejection on Zerodha

Tue, 12 May 2026 00:00:00 +0000

A DP (Depository Participant) sell rejection on Kite occurs when the system cannot authorise a debit from your demat account to deliver shares against a sell order. Since all equity delivery positions in India are held in dematerialised form with the depository (CDSL in Zerodha’s case), the demat debit authorisation is a mandatory step for every delivery sell.

There are two valid methods to authorise a demat debit at Zerodha : the TPIN + CDSL OTP flow (transaction-by-transaction, online), or the pre-authorised DDPI (Demat Debit and Pledge Instruction). The older Power of Attorney (POA) arrangement was phased out by SEBI in 2022 in favour of DDPI.