Your Mutual fund order will get rejected due to:

  1. Insufficient balance in your trading account for the order to be placed.

  2. If you sell your MF holdings to place a new Mutual fund order the same day, it’ll be rejected as the fund settlement (T+3) will not be completed yet. 

  3. Also, in case the order gets rejected due to any issue at the AMC’s end, the money will be refunded to your trading account which may take up to 10 working days.