Due diligence certificate confirming updated offer document, valid intermediaries, promoters' lock in and dematerialisation arrangements. Prescribed due diligence certificate must confirm the offer document was updated and contains all material disclosures at filing, that intermediary registrations named are valid and not debarred, that written shareholder consent has been obtained for promoters' contribution subject to lock-in and that such promoter securities have not been disposed of since drafting the prospectus. It also requires confirmation of dematerialisation agreements with depositories and, where applicable, disclosure of a cash flow statement in the red herring prospectus or prospectus.