I too got the following email from Z
but the link is returning a 404 (not found) error.
404
Kiaan couldn’t find that page
We couldn’t find the page you were looking for. Visit Zerodha’s home page
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As per the Prevention of Money Laundering Rules, 2005 all trading and demat accounts are required to be linked with Aadhaar. Since your Zerodha Account is not linked with Aadhaar, please do so at the earliest to avoid deactivation of your account. Visit
zerodha.com/aadhaar to link your Aadhaar now.
Regards,
Team Zerodha