How to lock Aadhaar biometric online, why you need it and other important information

Protecting personal information has never been so important, and Aadhaar's biometric lock facility provides an additional layer of security against unauthorized entry. As identity theft and misuse become greater concerns, locking your Aadhaar biometrics ensures that your prints and iris scans cannot be exploited for verification without your permission. This online security is especially handy in the fight against fraud in financial transactions and government services connected to Aadhaar. The process is rapid, easy, and can be accomplished online within a few clicks. With digital security becoming the number one concern, knowing how to activate this feature can serve to safeguard your sensitive data and retain control of your Aadhaar-linked activities.

Aadhaar biometric locking is a security feature launched by UIDAI to protect your fingerprint, iris, and face data from misuse. Activating this lock will prevent anyone from misusing your Aadhaar for identity verification, financial transactions, or SIM card issuance without your permission.
This feature is meant to avoid fraud, including spurious Aadhaar-based verifications and unauthorized banking operations. By locking your biometrics, you provide an additional level of protection to your Aadhaar, which becomes more resistant to possible misuse. The biometrics can be locked or unlocked at any time by users through the UIDAI portal or the mAadhaar application. The additional protection aids in strengthening privacy and helping Aadhaar function as a secure digital identity for Indian citizens, allowing for greater control over sensitive personal information.


In order to lock your Aadhaar biometrics, you will need to first generate an Aadhaar Virtual ID (VID). To do this, you can log in to the UIDAI official website and click on the 'VID Generator' option.
With your Virtual ID in hand, follow these instructions to lock your Aadhaar biometrics:
Aadhaar Virtual ID (VID)
Full Name
PIN Code
Captcha Code

This security function keeps your Aadhaar details secure from unauthorized entry, providing one additional layer of protection.

It is quite simple to lock your Aadhaar biometrics via the mAadhaar app by just following these easy steps:


If you want to lock your Aadhaar biometrics but don’t have internet access, you can do it easily through SMS. Just follow these simple steps:
If your phone number is linked to multiple Aadhaar numbers, use the last 8 digits instead of the last 4. That’s it—your biometrics are now locked for added security.

If your Aadhaar biometrics are locked, you will not be able to verify yourself using your finger or iris scan, and your phone will display the '330' error code. It doesn't indicate anything but the fact that the biometric is being blocked because of the lock.
Locking the Aadhaar biometrics is a necessary security measure to avoid misuse of your personal information. You can do this using the mAadhaar app, UIDAI website, or the SMS service (1947).
Once you activate it, no one can use your biometric information for verification without first unlocking it. This feature provides an additional layer of security, and you have complete control over how your Aadhaar data is accessed and used.
Also Read: Aadhaar Good Governance Portal: Know the steps for easy authentication, its features, benefits and other key information