Aadhaar eSign Explained: How It Works, Who Can Use It and When It’s Valid

Aadhaar eSign (also commonly searched Aadhar eSign) is a digital signing solution that verifies the signatory using an OTP. It is widely used today for contracts, onboarding forms and consent letters. Below we break down how it works.

What is Aadhaar eSign?

Aadhaar eSign is a digital signing solution that verifies the signatory. Rather than typing out a name or attaching an image of a signature, the signatory is authenticated by an Authorised eSign service provider. This means a signature can be attached to document with traceable information. Signatures created via the notified Aadhaar e-authentication method are recognised as valid under the IT Act, 2000.

How it works

1.The documents are uploaded along with the signatory details.

2.The signatory clicks on the link and views the document.

3.They then enter their Aadhaar number or Virtual ID and consent to sign.

4.An OTP is sent to the mobile number associated with the Aadhaar.

5.Once the OTP has been entered the document is signed and shared with all parties.

What you need

• Aaadhaar number (or VID)

• A mobile number associated with your Aadhaar

• Access to your phone so you can get your OTP.

If your mobile number is not associated then you will not get an OTP. Please ensure you update your Aadhaar centre.

Why use it?

• Quick turnaround – Signatures in minutes.

• Secure Identity Verification – Signatory is verified.

• Accurate records – All signatures have an audit trail with time stamps and verification.

• Easy to do remotely – You don’t have to meet.

When it may not be suitable

Certain documents cannot be signed digitally under the IT Act. These include Wills, Trusts, Powers of Attorney and Contracts to sell immovable property. Some agreements will require payment of Stamp Duty which varies between states but many states allow e-stamping. Please ensure you know what is required for your documents and seek legal advice if they are high value.

Choosing an Aadhaar eSign provider

Look for clear consent screens, an audit trail, tamper-proofing after signing, e-stamp support and secure storage of the signed copy. Signing usually sits inside a bigger digital onboarding flow, where identity checks such as KYC, PAN and Aadhaar verification happen first. Platforms like Zoop.one, which provide API-based identity verification, are one example of the technology teams use to automate that step. For the signing itself, ZoopSign offers Aadhaar eSign, along with e-stamping and document tracking.