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Procedure to Lock And Unlock Aadhar Biometrics Data

The introduction of Aadhar has helped individuals to use is as a credible government document as it acts as a valid identification proof as well as proof of address.

But, off recently, the security of Aadhar has come under scrutiny which has prompted the UIDAI to take necessary steps to safeguard the data and hence the option to lock or unlock the aadhar biometric data online was introduced. This feature will help the users to protect their biometric details from being misused by fraudsters.

There are two ways through which aadhar users can lock and unlock their aadhar biometric data online:

  • Via UIDAI’s portal
  • mAadhaar applicant

Procedure to Lock/ Unlock/ Disable Biometric Details Online via UIDAI Portal

Step 1: Visit the official web portal of UIDAI
Step 2: Mouse over ‘My Aadhaar’ option
Step 3: Now select the “Lock/Unlock Biometrics” under the Aadhaar Services subhead


Step 4: Enter the 12 digit aadhar number followed by the security code
Step 5: Click on the Send OTP option
Step 6: You will receive an OTP on your registered mobile number with Aadhar
Step 7: Proceeding further, enter the OTP which you receive on your mobile number and click on the login button.
Step 8: This feature will allow you to Lock your biometrics
Step 9: Now enter the 4 digit security code as mentioned on the screen and click on the ‘Enable’ button.
Step 10: Now your biometrics details will get locked and you will have to unlock it if you want to access it again.
Step 11: One can even unlock their biometrics. To do so, click on the “Login” button.
Step 12: Enter your aadhar number followed by the security code in the space
Step 13: Click on the “Send OTP” button.
Step 14: An OTP will be sent to the registered mobile number which is linked to Aadhaar.
Step 15: Now enter the OTP and click on the ‘Login’ button.
Step 16: If in case, you want to temporarily unlock the biometric details, then enter the security code and click the “Unlock” button.
Step 17: Your biometric details will be unlocked temporarily for 10 minutes.
Step 18: The locking date and time will be mentioned on the screen after which biometrics will automatically get locked.

Please Note:

  • If an Aadhar holder wishes not to lock their biometrics then they can disable the lock permanently.
  • The biometric lock disabling system is available to the users only via the online portal.
  • To disable the lock, one has to login to the UIDAI web portal using the Aadhar card number followed by security code and click on the ‘Disable’ button. Your Aadhar biometric details will be displayed permanently until you lock it again.

Procedure to Lock/Unlock Biometrics through mAadhaar

Step 1: Download and install the mAadhaar App to lock/unlock your biometric details.


Step 2: Add your profile in the app.
Step 3: Open your aadhar profile in the app.
Step 4: On the top right corner of the app, click on the three vertical dots.
Step 5: Select the biometric settings option.
Step 6: Select the Biometric Locking option by ticking the same
Step 7: Proceeding further, click on the tick mark.
Step 8: An OTP will be requested from your mobile number.
Step 9: UIDAI will send the OTP to your registered Aadhar mobile number.
Step 10: The OTP will be fed automatically in the application.
Step 11: Now, your biometric details will get locked after you approve the task.

Please Note: It usually takes up to 6 hours to activate the Biometric Lock.

If an individual have to verify Aadhaar using the biometrics details, then they can unlock their biometric details using the mAadhaar App by following the below-mentioned procedure.

Step 1: Login to your mAadhaar app.
Step 2: Open your respective profile in the app.
Step 3: Click on the three vertical dots which is present on the top right corner of the app
Step 4: Now Select the Biometric Settings option
Step 5: Unselect the Enable Biometric Locking option
Step 6: Proceeding further, now click on the tick mark to complete the process.
Step 7: An OTP will be sent and fed automatically in the app.
Step 8: Now you will have to approve the process to proceed further.
Step 9: Post-approval, your biometric details will be unlocked temporarily for 10 minutes.
Step 10: During this time one can authenticate using the biometric details.
Step 11: Your biometric details will get locked automatically after 10 minutes.

Please Note: There is no provision to disable the biometric lock using mAadhaar app. If one wishes to do so, then they will have to log in to the UIDAI’s web portal to disable the biometric lock.

Features of Aadhaar Biometric Locking

  • The biometric locking is introduced by the UIDAI to prevent the misuse of biometric authentication.
  • Under this service of aadhar, the user’s iris scan and fingerprints are locked.
  • The biometric lock can be unlocked temporarily for authentication purpose.
  • When unlocked, the user will get a window time of 10 minutes for checking the authentication of his/her biometric details.
  • The biometric authentication is not possible after the time gap of 10 minutes, as the data gets locked automatically.
  • If in case, the user does not want to keep the biometrics details locked, then they can disable it.
  • Until the user unlocks or disables the biometric details, authentication is not possible through the biometric method.
  • To protect the biometric details from getting hacked, individuals have to lock their biometrics.
  • It is mandatory to link your mobile number with Aadhar to avail this facility.
  • If your mobile number is not registered with UIDAI, then you will not be able to utilize this service.
  • There will be no fee charged to lock, unlock or disable the biometric lock.
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