An individual or company must purposely select the DSC class while applying for it. These are: Class 1: It verifies the name and email address of individuals. Class 2: It is required by companies and other entities and can be used for filing tax returns. However, the Controller of Certifying Authorities discontinued Class 2 Certificates from 01.01.2021 and instructed the issuance of Class 3 Certificates in their place. Class 3: It is used by individuals or entities who need to sign online forms on government portals like company registration forms, EPF registration forms, and online auctions or tenders. It is the most secure form of a digital signature certificate.