Class 3 is the highest level of assurance among Digital Signature Certificates in India. After Class 2 was discontinued in January 2021, Class 3 became the single standard for statutory filings and e-commerce transactions that require a digital signature.
This guide explains what a Class 3 DSC is, where it is used, the documents you need, and the application process.
What is Class 3 DSC?
A Class 3 DSC verifies the holder's identity to a high degree of assurance through in-person or video-based verification. It is issued by a licensed Certifying Authority and stored on a secure USB crypto token.
Because of its higher assurance, Class 3 is accepted everywhere a digital signature is required — from incorporating a company to signing tender bids.
| Assurance level | Highest (Class 3) |
|---|---|
| Types | Sign only, or Sign + Encrypt (for e-tendering) |
| Validity options | 1, 2 or 3 years |
| Mandatory storage | FIPS-compliant USB token |
Sign + Encrypt for tenders
Who needs it
- Company/LLP incorporation and MCA filings
- GST registration and return filing (for companies and LLPs)
- Income tax e-filing where digital signing is required
- DGFT filings for Import Export Code and licences
- e-Tendering, e-auctions and the Government e-Marketplace (GeM)
- Signing contracts and other legally binding documents
Documents required
- PAN card
- Aadhaar or other government photo ID
- Address proof
- Passport-size photo
- Active email and mobile for OTP
Step-by-step process
- Select the certificate. Choose Class 3, decide Sign-only or Sign + Encrypt, and pick validity.
- eKYC verification. Verify identity via Aadhaar eKYC or PAN-based KYC and complete video verification.
- Approval. The Certifying Authority approves the request after verification.
- Token download. Download the DSC onto your USB crypto token using the CA's utility.
Fees and timeline
Usually issued the same day or within 1–2 working days.
Frequently asked questions
Is Class 2 still available?
No. Class 2 DSCs were discontinued from 1 January 2021. Class 3 is now the standard.
Which DSC do I need for company registration?
A Class 3 DSC (Sign) for each proposed director and subscriber.