Demat Debit and Pledge Instruction (DDPI)
The Demat Debit and Pledge Instruction (DDPI) is a limited authorisation instrument introduced by SEBI in 2022 to replace the broad Power of Attorney, allowing a broker to debit securities from a client's demat account only for delivery of sold securities or to create a pledge in favour of the broker for margin purposes.
The DDPI was introduced through a SEBI circular issued in May 2022 and was made mandatory for all new demat accounts from July 2022. The circular required brokers to transition existing clients from PoA-based arrangements to DDPI over a specified migration timeline. NSDL and CDSL were directed to operationalise the DDPI mechanism within their technical infrastructure.
The DDPI is conceptually similar to a PoA but is structurally more limited and more transparent. Under the DDPI framework, the investor authorises the broker to perform two specific actions: first, to instruct the DP to debit securities from the client's account to the broker's pool account (or directly to the clearing corporation) when the client has sold securities and a settlement obligation exists; and second, to create a pledge over specified securities for margin purposes. No other actions—such as transferring shares for non-trade purposes, or pledging without client consent—are covered by the DDPI.
A critical technical feature of the DDPI is that it requires client authentication at the time of each debit instruction. Unlike the old PoA where a single signature granted open-ended authority, the DDPI typically requires TPIN (Transaction PIN) verification or OTP authentication through the depository's system when securities are debited. This means the client must actively authorise each debit, even if they have signed the DDPI—adding a real-time check against unauthorised transactions.
For retail investors, the DDPI is a significant improvement in protection. The two-factor verification for each debit makes it structurally impossible for a broker to silently transfer client shares. If a broker generates a debit request that the client has not approved, the client will receive an OTP or TPIN prompt and can refuse to authenticate, thereby blocking the unauthorised transfer.
Brokers are required to obtain a fresh DDPI from all existing clients as they onboard them onto the new system, and must not use the old PoA for new transactions once the DDPI transition is complete. The DDPI document itself is standardised in format, approved by SEBI, and cannot be modified by individual brokers to expand the scope of authorisation.