You can sign a contract with an OTP on your phone — and it holds up. Here’s how Aadhaar eSign works under Indian law, and when it’s enforceable.
Aadhaar eSign is an online electronic-signature service that lets a person sign a document using Aadhaar-based authentication — typically an OTP sent to the Aadhaar-linked mobile number. There is no dongle, no physical token and no in-person meeting.
Yes. Electronic signatures are recognised under the Information Technology Act, 2000. An Aadhaar-based eSign performed through a licensed eSign service, following the eSign API of the Controller of Certifying Authorities (CCA), is treated as a valid electronic signature for most agreements and documents.
An electronic signature that meets the conditions of the IT Act, 2000 has the same legal standing as a handwritten signature for most purposes.
Every Aadhaar eSign is tied to an authenticated identity and a timestamp, and produces a tamper-evident trail. That makes it easier to prove who signed, and when — which is often harder with a scanned wet signature.
Signing is one step; executing a document properly means verifying the parties (eKYC), affixing the correct stamp duty, and capturing court-admissible proof. On IOUX, all of that happens in one flow, and every execution comes with an advocate-certified Digital Document Execution (DDE) report.
This article is general information about Indian law and practice, not legal advice. Rules vary by state and change over time — confirm the current position for your situation before relying on it.
Related guides: eSign Online · Court-admissible evidence · eKYC explained