In general, the mandate SMS or notification is triggered within a few minutes of the bid being placed. However, at times, there may be a delay due to technical issues at NPCI. Here's a representation of IPO application flow:

If you have not received an SMS or notification for amount-blocking even after six hours of placing your bid, you may have to apply again. 

To do this, login to Upstox, delete your application, and reapply. This will trigger the amount-blocking-related SMS/notification on your UPI app.    

Ensure to check the following before re-submitting your bid:

  1. Did you enter the correct UPI ID?
  2. Is your UPI app updated to the latest available version?
  3. Do your UPI app and bank support IPO bids? - Check here .
  4. Have you received the mandate request on your UPI app but didn't get a notification? Click here