You can lock Aadhaar biometrics so that your fingerprint, iris and face data cannot be used to verify you until you unlock them again. It takes a few minutes on the UIDAI website or the mAadhaar app, and you need your registered mobile number for the OTP. This guide covers both routes, plus what to do when you need to unlock.
Quick answer
- Where: the UIDAI website or the mAadhaar app.
- You need: your 12-digit Aadhaar number, a captcha and an OTP on your registered mobile.
- Effect: while locked, biometric authentication (fingerprint, iris, face) fails.
- Temporary unlock: the website offers one that lasts 10 minutes, then locks again.
- Remember: unlock before any biometric KYC, such as a bank or demat account opening.
Why lock Aadhaar biometrics at all
Your Aadhaar number is shared widely, from SIM cards to bank forms. Biometrics are the part that cannot be changed if misused. So a lock adds a simple safeguard for most people who do not use biometric checks every week.
It is a good idea for family members who rarely need them, such as older parents. However, it is not needed if you authenticate by fingerprint daily for work.
Steps to lock on the UIDAI website
First, open the UIDAI website and log in. Enter your 12-digit Aadhaar number, the captcha and the OTP sent by SMS to your registered mobile. Then choose the “Lock/Unlock Biometrics” option from the menu.
Press Next, tick the confirmation box and press Next again. Your biometrics are now locked. Keep a screenshot of the success message for your records.
Steps to lock on the mAadhaar app
Open the mAadhaar app and log in with your mobile number and the SMS OTP. Go to My Aadhaar and create a PIN if the app asks for one. Then enter your Aadhaar number and OTP.
Next, open Biometrics Lock and tap “Lock Biometric”. Enter the captcha, tap Request OTP and type the OTP you receive. The app confirms the lock once this is done.
How to unlock, temporarily or for good
On the website, log in the same way, open Lock/Unlock Biometrics and press Next. You can then choose a temporary or a permanent unlock. In the app, open Biometrics Lock, tap “Unlock Biometric”, enter the captcha and verify with the OTP.
| Option | What it does | Best for |
|---|---|---|
| Lock | Blocks fingerprint, iris and face authentication | Everyday safety |
| Temporary unlock | Opens biometrics for 10 minutes on the website, then relocks | One KYC or one fingerprint check |
| Permanent unlock | Removes the lock until you lock again | People who use biometrics often |
Common mistakes to avoid
The biggest problem is a mobile number that is not registered with Aadhaar. Without it, the OTP never arrives and you cannot lock or unlock. Update the number at an Aadhaar centre first.
The second mistake is forgetting that the lock is on. For example, a bank may reject your fingerprint at an account opening, and the fault is your own lock. So unlock for a short period, finish the check, then relock.
Also avoid sharing the OTP with anyone who calls you. UIDAI will not ask for it on a phone call. If a caller does, treat it as a scam and report it, as explained in our guide to flagging a scam call or SMS.
A short checklist
Confirm your mobile number is linked. Lock your biometrics once, and note the date. When you need a biometric check, use a temporary unlock and finish quickly. Afterwards, check that the lock is back on. The official steps and any changes are always listed on the UIDAI website.
FAQ
Does locking Aadhaar biometrics cancel my Aadhaar card?
No. It only blocks biometric matches. The card stays valid, and you can unlock at any time with an OTP.
How long does a temporary unlock last?
On the UIDAI website it lasts 10 minutes, and then the biometrics lock again by themselves. Finish your fingerprint or iris check within that window.
Can I lock my family’s biometrics from my phone?
Each lock needs the OTP sent to the mobile number registered with that Aadhaar. So you can only do it for another person if you can receive their OTP.
