Aadhaar authentication is used for identity verification across a wide range of services in India. Depending on the service, authentication may involve an OTP, demographic information or biometric data such as fingerprints, iris scans or face authentication.
For Aadhaar holders who want greater control over the use of their biometric information, the Unique Identification Authority of India (UIDAI) provides an official Biometric Lock/Unlock facility.
When biometric locking is enabled, fingerprint, iris and face-based Aadhaar authentication is restricted until the Aadhaar holder temporarily unlocks the biometrics or disables the locking facility.
This guide explains what Aadhaar biometric locking means, how to lock or unlock biometrics, what happens after locking, the importance of a registered mobile number and other useful Aadhaar privacy features.
Information verified on October 3, 2026: Aadhaar services, portal interfaces and authentication procedures may change. Always follow the latest instructions displayed on the official UIDAI or MyAadhaar platform.
What Is Aadhaar Biometric Lock Unlock?
Aadhaar Biometric Locking is a security facility provided by UIDAI that allows an Aadhaar holder to lock and temporarily unlock biometric authentication.
According to UIDAI, the biometric modalities covered by this facility include:
- Fingerprints
- Iris
- Face authentication
Once biometrics are locked, Aadhaar authentication using these biometric methods cannot be completed until the biometrics are temporarily unlocked or the locking system is disabled.
You can read UIDAI’s official information here:
UIDAI Biometric Lock/Unlock – Official FAQ
Why Is the Biometric Lock Feature Useful?
Biometric information is an important part of Aadhaar authentication.
UIDAI provides the locking facility to give Aadhaar holders additional control over when their biometric data can be used for authentication.
For example, a person who rarely uses fingerprint, iris or face-based Aadhaar authentication may choose to keep biometrics locked and temporarily unlock them when a genuine service requires biometric verification.
However, biometric locking should be considered an additional security control rather than a replacement for normal digital-safety practices.
Aadhaar holders should continue to protect:
- Aadhaar details
- Registered mobile numbers
- OTPs
- Identity documents
- Login credentials
- Personal information shared online
What Happens When Aadhaar Biometrics Are Locked?
When biometric locking is active, Aadhaar authentication using fingerprint, iris or face will not work.
UIDAI states that when biometric authentication is attempted while the biometrics are locked, the authentication cannot be completed and a specific error indicating that biometrics are locked may be returned.
This also means biometric locking can prevent a legitimate authentication attempt.
For example, if a bank, government office, service provider or authorised centre requires biometric Aadhaar authentication, you may need to temporarily unlock your biometrics before completing the verification.
Locking your biometrics does not cancel your Aadhaar number.
Who Can Lock Aadhaar Biometrics?
UIDAI states that Aadhaar number holders with a registered mobile number can use the biometric locking facility.
The registered mobile number is important because Aadhaar online security services generally use OTP-based verification.
If your current mobile number is not registered with Aadhaar, follow UIDAI’s official procedure for updating your mobile number through an authorised Aadhaar enrolment or update facility.
Do not share an Aadhaar OTP with a caller, agent or person who claims they can lock or unlock your biometrics on your behalf.
How to Lock Aadhaar Biometrics Online
UIDAI provides Aadhaar services through its official website and MyAadhaar platform.
Step 1: Open the Official Aadhaar Service
Visit the official MyAadhaar portal:
You can also view Aadhaar services through UIDAI:
Before entering personal information, confirm that you are using an official UIDAI website.
Avoid websites that imitate Aadhaar pages or promise special Aadhaar services through unofficial links.
Step 2: Find the Lock/Unlock Biometrics Service
Look for the Lock/Unlock Biometrics or biometric security option available through the Aadhaar services section.
Portal menus and screen layouts may change, so follow the current options displayed by UIDAI.
Step 3: Complete the Required Verification
Enter the information requested by the official platform.
An OTP may be sent to the mobile number registered with Aadhaar.
Enter the OTP only on the official UIDAI or MyAadhaar platform that you personally opened.
Never provide your Aadhaar OTP to someone over:
- A phone call
- SMS reply
- Social media
- Screen-sharing applications
Step 4: Enable Biometric Locking
Select the option to lock your biometrics and complete the confirmation process displayed by UIDAI.
After biometric locking is enabled, fingerprint, iris and face-based Aadhaar authentication will remain restricted until you temporarily unlock the biometrics or disable the locking system.
How to Temporarily Unlock Aadhaar Biometrics
Biometric locking does not permanently prevent you from using biometric Aadhaar authentication.
UIDAI provides a temporary unlock option.
When you need fingerprint, iris or face-based Aadhaar authentication:
- Open the official UIDAI or MyAadhaar service.
- Access the biometric lock/unlock facility.
- Complete the required identity verification.
- Choose the applicable temporary unlock option.
- Follow the instructions shown by UIDAI.
After temporarily unlocking your biometrics, you can use biometric authentication when required.
The biometric locking facility can remain enabled for future protection.
UIDAI also states that biometric unlocking can be accessed through supported UIDAI channels, including its website, Aadhaar Seva Kendra or enrolment facilities and supported Aadhaar mobile services.
Official information:
How to Unlock Locked Aadhaar Biometrics – UIDAI
Temporary Unlock and Disable Locking Are Different
UIDAI provides two different options after biometric locking has been enabled:
Temporary Unlock
This option temporarily makes biometric authentication available when you need to complete a legitimate Aadhaar biometric verification.
Disable Biometric Locking
This turns off the biometric locking facility.
Your biometrics will no longer remain protected by the locking feature until you enable it again.
Therefore, check the option displayed by UIDAI carefully before confirming your request.
If you want the protection to continue after completing a biometric verification, use the appropriate temporary unlock facility rather than permanently disabling the locking feature.
Aadhaar Biometric Lock and Aadhaar Number Lock Are Different
UIDAI provides both Biometric Lock/Unlock and Aadhaar Lock/Unlock services.
They are not the same feature.
Biometric Lock
Biometric locking restricts Aadhaar authentication using:
- Fingerprints
- Iris
- Face authentication
Aadhaar Number Lock
UIDAI also provides a separate Aadhaar number locking facility.
According to UIDAI, when an Aadhaar number is locked, authentication using the Aadhaar number is restricted. A Virtual ID may be used for supported authentication purposes according to UIDAI’s applicable process.
You can view the available security services here:
Official UIDAI Aadhaar Services
Before activating either feature, make sure you understand whether you want to lock only biometric authentication or use the separate Aadhaar number locking service.
What If Your Mobile Number Is Not Registered With Aadhaar?
A registered mobile number is essential for UIDAI’s online biometric lock/unlock facility.
If you no longer have access to the mobile number registered with Aadhaar or your mobile number has never been registered, you may need to update it through an authorised Aadhaar facility.
Follow the latest UIDAI instructions instead of relying on third-party agents.
Be cautious if someone claims that they can remotely change your Aadhaar registered mobile number simply by receiving an OTP or payment.
Use only official UIDAI channels.
Can Aadhaar Biometrics Be Locked Through a Mobile App?
UIDAI provides Aadhaar-related services through supported official mobile services as well as its web platforms.
Availability and menu options can change between application versions.
If you use an Aadhaar mobile application:
- Download it only from an official or trusted app store.
- Verify the developer information.
- Check the application name carefully.
- Avoid unofficial APK files.
- Do not grant unnecessary permissions to unknown Aadhaar-related apps.
When in doubt, use the official UIDAI website or MyAadhaar portal.
Should Everyone Lock Aadhaar Biometrics?
Biometric locking is an optional security feature.
Whether you use it depends on your requirements and how frequently you rely on Aadhaar biometric authentication.
It may be useful for people who do not regularly need fingerprint, iris or face authentication and prefer to keep biometric authentication restricted until required.
However, users should remember that a legitimate biometric Aadhaar authentication attempt may fail while biometrics are locked.
If you know that biometric verification will be required for a genuine service, use UIDAI’s official temporary unlock facility before completing the authentication.
How to Check Aadhaar Authentication History
UIDAI also provides an Aadhaar Authentication History facility.
It can help an Aadhaar holder review authentication transactions recorded against Aadhaar within the period supported by UIDAI.
UIDAI states that the authentication history can provide details such as:
- Authentication modality
- Date and time
- UIDAI response code
- Authentication User Agency information
- Transaction information
- Authentication success or failure
- Error code, where applicable
A registered mobile number is required for this online service.
You can read the official information here:
UIDAI Aadhaar Authentication History
If you see an authentication transaction that you do not recognise, follow UIDAI’s official guidance and contact the relevant Authentication User Agency where appropriate.
What Is Masked Aadhaar?
Masked Aadhaar is another privacy-related option available from UIDAI.
In a Masked Aadhaar, the first eight digits of the Aadhaar number are replaced with xxxx-xxxx, while only the final four digits remain visible.
Masked Aadhaar and biometric locking serve different purposes.
Masked Aadhaar changes how much of the Aadhaar number is displayed on the downloaded document.
Biometric Locking controls whether fingerprint, iris or face-based Aadhaar authentication can be performed.
Official information:
UIDAI e-Aadhaar and Masked Aadhaar FAQ
What Is Aadhaar Virtual ID?
A Virtual ID, also known as VID, is a temporary and revocable 16-digit random number mapped to an Aadhaar number.
UIDAI states that VID can be used instead of the Aadhaar number for supported authentication or e-KYC services.
The Aadhaar number cannot be derived from the VID.
Aadhaar holders can generate and manage VID using UIDAI’s supported services.
Official information:
VID, Masked Aadhaar, biometric locking and Aadhaar number locking are separate features.
Each is designed for a different purpose.
Aadhaar Security Tips to Follow
Biometric locking can provide additional control, but users should also follow basic security practices.
Never Share an Aadhaar OTP
Do not share an Aadhaar OTP with:
- Unknown callers
- WhatsApp contacts
- Social-media users
- Unverified agents
- People claiming to provide remote Aadhaar support
An OTP should be entered only when you personally start a genuine Aadhaar transaction.
Check the Website Address Carefully
Fraudulent websites can imitate government portals.
Before entering Aadhaar details, make sure you are using an official UIDAI website.
The main official websites include:
Avoid Sharing Full Aadhaar Copies Unnecessarily
Do not post Aadhaar images publicly or send them through social media unless there is a genuine and verified requirement.
Where applicable and accepted, consider privacy-friendly Aadhaar options such as Masked Aadhaar.
Do Not Install Remote-Control Apps for Unknown Callers
Be cautious if someone claiming to represent a bank, government department, telecom company or customer-support service asks you to install a remote-access or screen-sharing application.
Do not allow an unknown person to remotely control your mobile phone while accessing Aadhaar or banking services.
Avoid Unofficial Aadhaar Agents Online
Use authorised Aadhaar centres and official UIDAI online services.
Do not trust advertisements or social-media posts that promise guaranteed Aadhaar corrections, biometric changes or instant verification through unofficial channels.
What to Do If Aadhaar Biometric Authentication Fails
Biometric authentication may fail for different reasons.
If you have enabled biometric locking, first check whether your biometrics are currently locked.
Other possible causes may include:
- Fingerprint capture problems
- Device issues
- Network problems
- Technical interruptions
- Incorrect information
- Biometric information that may require updating
- Issues at the authentication location
If the problem continues, use UIDAI’s official support channels or visit an authorised Aadhaar facility where appropriate.
Do not repeatedly provide biometric information to an unknown or unauthorised person.
Frequently Asked Questions
What Aadhaar biometrics can be locked?
UIDAI states that fingerprint, iris and face biometric modalities are covered by the biometric locking facility.
Does locking biometrics cancel my Aadhaar?
No. Biometric locking restricts biometric authentication. It does not cancel the Aadhaar number.
Can fingerprint authentication work while Aadhaar biometrics are locked?
No. Fingerprint, iris and face-based Aadhaar authentication cannot be completed while the biometric modalities remain locked.
Can I temporarily unlock Aadhaar biometrics?
Yes. UIDAI provides a temporary biometric unlock facility.
Can I permanently turn off biometric locking?
UIDAI provides an option to disable the biometric locking system. This is different from temporarily unlocking biometrics for an authentication requirement.
Is a registered mobile number required?
Yes. UIDAI states that a registered mobile number is essential for the biometric lock/unlock service.
Is biometric lock the same as Aadhaar number lock?
No. They are separate UIDAI security features. Biometric lock restricts fingerprint, iris and face authentication, while Aadhaar number locking applies to authentication using the Aadhaar number according to UIDAI’s applicable process.
What is Masked Aadhaar?
Masked Aadhaar hides the first eight digits of the Aadhaar number and displays only the final four digits on the downloaded Aadhaar document.
What is a Virtual ID?
VID is a temporary, revocable 16-digit random number linked to an Aadhaar number. It can be used instead of the Aadhaar number for supported authentication and e-KYC services.
Where should I access Aadhaar services?
Use the official UIDAI website or MyAadhaar platform:
Final Thoughts
Aadhaar Biometric Lock/Unlock gives Aadhaar holders greater control over fingerprint, iris and face-based authentication.
Users who do not frequently need biometric Aadhaar authentication can keep their biometrics locked and use UIDAI’s temporary unlock facility when a genuine biometric verification is required.
At the same time, biometric locking is only one part of Aadhaar security.
Protect your registered mobile number, never share OTPs with unknown people, use only official UIDAI websites and avoid unnecessary sharing of Aadhaar documents.
Before changing any Aadhaar security setting, read the latest instructions displayed on the official UIDAI or MyAadhaar platform.
Official Sources
Unique Identification Authority of India (UIDAI)
https://uidai.gov.in/
MyAadhaar Official Portal
https://myaadhaar.uidai.gov.in/
UIDAI – Biometric Lock/Unlock FAQ
https://uidai.gov.in/en/contact-support/have-any-question/925-english-uk/faqs/aadhaar-online-services/biometric-lock-unlock.html
UIDAI – Aadhaar Services
https://uidai.gov.in/en/my-aadhaar/avail-aadhaar-services.html
UIDAI – Aadhaar Authentication History
https://uidai.gov.in/en/contact-support/have-any-question/305-english-uk/faqs/aadhaar-online-services/aadhaar-authentication-history.html
UIDAI – Virtual ID (VID)
https://uidai.gov.in/en/284-faqs/aadhaar-online-services/virtual-id-vid/1893-what-is-virtual-id-vid.html
UIDAI – e-Aadhaar and Masked Aadhaar
https://uidai.gov.in/en/contact-support/have-any-question/283-faqs/your-aadhaar/e-aadhaar.html
Disclaimer
This article is provided for general informational and digital-awareness purposes only. DIGIT KERALA is an independent information website and is not affiliated with, endorsed by or operated by UIDAI or the Government of India.
Aadhaar services, eligibility requirements, authentication methods, portal interfaces and procedures may change over time. Readers should verify the latest information through the official UIDAI or MyAadhaar website before taking any action. Never share Aadhaar OTPs, biometric information or other sensitive personal information with unknown individuals or unofficial websites.