The Public Announcement contains procedure for such cases i.e. where the shareholders do not receive the letter of offer or do not receive the letter of offer in time. The shareholders are usually advised to send their consent to Registrar to offer, if any or to MB on plain paper stating the name, address, number of shares held, Distinctive Folio No, number of shares offered and bank details along with the documents mentioned in the Public Announcement, before closure of the offer.
The public announcement and the letter of offer along with the form of acceptance is available on the SEBI website.
For more information, click here.