If you modify your IPO bid but do not approve the new UPI mandate request, the blocked amount will remain the same as the original bid.
 

Here's how it works:

1. When you modify a bid, a new UPI mandate request is sent to your payment app.
    
2. You must approve this new mandate for the changes to take effect.
    
3. If you don’t approve the new mandate, the old blocked amount remains unchanged.
    

For example:

• If you initially apply for 2 lots at ₹15,000 per lot (total ₹30,000), ₹30,000 gets blocked.
   
• If you later modify it to 3 lots, a new mandate for ₹45,000 is sent.
   
• Only after approving the new mandate will the additional ₹15,000 be blocked.
   

The UPI mandate can be approved until 5 PM on the IPO’s closing day.