If you have a POA, then selling scrips would not require CDSL authorisation. In case of a non-POA account, this order might get rejected if authorisation is not done on the day of order execution. As per exchange regulations, the equity sell order would get rejected if it is not authorised and the user will have to place the order again. 

You can read more about it here: https://upstox.com/market-talk/an-introduction-to-our-revamped-e-dis-process/ 

To authorise a equity sell order, follow the steps below:

  1. Once a placed sell order is triggered, you will receive an in-app notification, email and SMS.

  2. Click on the notification and you will be redirected to the CDSL website

  3. Enter the OTP sent to you via CDSL to authorise the GTT order.

  4. This is mandatory as per SEBI guidelines and authorisation needs to be done before 5:00 pm on the same day.

  5. If the user fails to authorise the order by 5:00 pm, it shall be treated as a rejected order.