Process for Registration of Digital Signature Certificate Ministry of Corporate affairs has appointed following authorities as certifying authorities for obtaining DSC, they are National Informatics centre, IDRBT, Safe Script, nCode, Tata Consultancy Services, NC-Code and e-Mudhra. Now a times DSC is become mandatory for Company registration and Filing Annual Returns, so for incorporating a company all the respected documents must have DSC of the company. DSC can be obtained by submitting required original documents to Certifying authorities. DSC can be valid for 1 year or 2 years as per the terms of application and can be renewed.