Hi @priyank87, Dhan had two factor authentication even before the SEBI guidelines came in.
We have introduced fast QR login and made it mandatory post the regulation: Important Note: 2FA Login for Dhan Web & TradingView users
If you are being asked PIN, then there is already an existing session that is running on your device and it is being revalidated. If that session also expires, then you will have to a fresh login with 2-factor authentication once again.