E-mails have been sent to such DIN holders who are covered in the above categories, viz nonavailability of PAN or mismatch of PAN with DIN, and whose e-mail addresses are available in the MCA21 system. However, there are such DIN holders also whose e-mail addresses are not available in MCA21 system. All such cases of non-availability of PAN or mismatch between PAN and DIN have been made available in MCA21 Portal. You are advised to visit the MCA21 Portal to check your details and to file the DIN4 form wherever required. Filing information under DIN4 form is free of any charges. Non-provision of PAN details or any mismatch in DIN and PAN information will be treated as default and such DINs may be disabled for access of MCA21 System after December 15, 2011.