Why has the exchange or depository sent an email asking to add a nominee to the Zerodha account?

As per the SEBI circular (WEB), exchanges and depositories (PDF) must ask clients to opt-in or out of a nomination for their accounts. Clients are not required to act because Zerodha has communicated their preferences to the exchanges, and their trading account will remain unaffected.

Zerodha strongly recommends adding a nominee(s) to the account, as it is critical in planning seamless succession. To learn how to add a nominee(s), see How to add a nominee to the Zerodha account online? To learn if a nominee has been added to the account, visit console.zerodha.com/account/nominee.

Clients who have not added nominee(s) or do not wish to add a nominee(s) to their account can ignore the email.