A) Signing - Individual.
B) Signing - Individual with Organization Name.
C) Signing and Encryption (COMBO) - Individual.
D) Signing and Encryption (COMBO) - Individual with Organization Name.
Class 3 Digital Signature Certificates are required for e-tendering, e-procurement, e-bidding or e-ticketing for Indian Railway Catering and Tourism Corporation Limited (IRCTC), Indian Railways (IREPS),eTendering System Government of Kerala, Directorate General of Supplies & Disposals (DGSND), Indian Oil Corporation Ltd. (IOCL), Hindustan Petroleum Corporation Limited (HPCL), Oil India Limited (OIL), Oil & Natural Gas Corporation (ONGC), Bharat Petroleum Corporation Limited (BPCL), GAIL, NTPC, Government of Gujarat, Maharashtra Government, Karnataka Government (Karnataka e-procurement), West Bengal State Rural Development Agency (WBSRDA), Tamil Nadu Government (PMGSY), Madhya Pradesh Government, BIHAR GOVERNMENT (PMGSY), Government of Orissa (PMGSY), Coal India Limited, Gujarat Narmada Valley Fertilizers Corporation Ltd. (GNFC Ltd.), MSTC Limited, Neyveli Lignite Corporation Limited, Metal Junctions, Water Resources Department, Patent and trade marks registration, Air India etc.,