Yes, the investor can revise or withdraw the bids after application. It can be done only once the order is executed. The investor needs to go to the IPO Order Book and select the Transaction Id and then click on Withdraw Application/ Revise Bid. The application in the non- institutional category cannot be withdrawn but can only be revised.
However, this needs to be done during the issue itself and cannot be done after the issue is closed. In case of ASBA applications, for upward revision of bid, additional lien will be marked to the extent of incremental amount. However, in case of downward revision, differential money blocked earlier will not be released. Such amount, if any, will be released after allotment