In India, filing a trademark application online requires a Digital Signature Certificate (DSC) — specifically a Class 3 Digital Signature Certificate — to authenticate the submission securely and legally. Why Is a Digital Signature Needed for Trademark Filing? When you file a trademark application with the Controller General of Patents, Designs and Trade Marks (CGPDTM) in India, you... https://www.dsc7.com/digital-signature-for-trademarkefiling.php