Class 2 Digital Signature Certificates are generally used for filing documents Income Tax, Registrar of Companies and VAT, whereas Class 3 Digital Signature Certificates are needed for e-tendering, which is a procurement process that is conducted online. The aspects where this comes into play include:
� Contract download
� Evaluation of tenders (May or may not involve e-auctions)
� Supplier registration/expression of interest
� Submission of bid document
The Ministry of Company Affairs, Government of India (GoI) has initiated MCA21 program, for easy and secure access to its services in a manner that best suits the businesses and citizens. The MCA21 application is designed to support Class 2 & 3 Digital Signature Certificates (DSC) issued by licensed Certifying Authority under Controller of Certifying Authorities.