As per the requirement, all the public issues of size in excess of Rs.10 crore, are to be made compulsorily in demat mode. Thus, if you intend to apply for an issue that is being made in a compulsory demat mode, you are required to have a demat account and also have the responsibility to put the correct DP ID and Client ID details in the bid/application forms. Just as the demat account is compulsory, having a PAN is also mandatory for an IPO application. It is compulsory to have PAN. Any investor who wants to invest in an issue should have a PAN which is required to be mentioned in the application form. It is to be distinctly understood that the photocopy of the PAN is not required to be attached along with the application form at the time of making an application.