How to lock and update your Aadhaar biometric data (and more!)

In view of the obvious push for Aadhaar by the central and state governments, here is a quick FAQ to resolve your doubts and fears over the data shared with the UIDAI.

The increasing emphasis by the government on the Aadhaar framework as the basis of a developing social security net for the citizen makes it ever more relevant and important to have. Despite Supreme Court rulings to the contrary, the Central and several state governments have made Aadhaar mandatory for citizens to avail a range of services and to get benefits of various government schemes. Even the Union Budget presented by Arun Jaitley on February 1st indicated an obvious push for Aadhaar, with recommendations for various facilities linked to the unique identification number.

Yet, the ordinary citizen continues to have privacy and security-related concerns pertaining to the information shared with the Unique Identification Authority of India (UIDAI). Based on the information shared by the UIDAI, here is a quick FAQ to answer some of the most common enquiries and concerns about Aadhaar.

  • What is biometric lock? How does one enable it? When and why is it useful?

A person seeking Aadhaar enrollment has to provide biometric data that consists of his fingerprint and retina scan. These biometric details are locked by default and nobody can play with the fingerprint and retina scan data. However, if you are using biometric data for Aadhaar verification, for example, if you submit your Aadhaar card as a proof of identity to get a SIM card, then you can use your fingerprint to allow the telecom company to verify your identity.

Since your biometric data is locked by default, the service provider cannot gain access to the information to match the fingerprint, unless you give explicit permission for the same.

The Aadhaar holder can allow the service provider to access biometric data by unlocking it and the process is quite simple. One should visit this page, enter his 12-digit Aadhaar card number and the security code. Soon you will get an OTP on your registered mobile phone number. Once you enter the OTP, the data will be unlocked. To lock it again, one should click on the ‘enable’ option.

It is always better to enable the lock soon after the authentication is done, to avoid a third person misusing your Aadhaar biometric data.

  • How can you update demographic data?

The UIDAI also collects the demographic data of residents during the process of enrolment and stores them in a centralised database. Demographic data can be updated by self-service online mode, via post, in permanent Aadhaar enrolment centres and the Centre for e-Governance, or through private agencies.

However, officials suggest that updates be done at permanent enrolment centres as the percentage of rejection is more if one does it online himself or through private agencies. This is because the permanent enrolment centres mandate the presence of the resident and also verify biometric data while updating the information.

  • How long does it take to update the information once we place a request?

Change of name, address etc is updated within 24 hours of submitting the request and updates of email and mobile number can be done in less than 4 hours. The process is free of cost in government centres while private agencies charge for updating.

  • How can you update biometric data (fingerprints, iris scan and facial photograph)?

Your biometric data has to be updated in the UIDAI records in case of transplants and plastic surgery, or when the child attains the age of five, then at age 15 and later once in every 10 years. Biometric update requests can be made only with the help of an operator at permanent Aadhaar enrolment centres. One should submit support documents for proof of identity and proof of address while making the request. Here is the list of support documents, any of which could be submitted as documentary evidence:

Biometric updates takes place within 4-5 days of submission of the request.

  • How can you change the privacy and information consent that you had initially given while registering for Aadhaar?

The process is the same as that of updating biometric details. The Aadhaar holder should visit any of the permanent enrolment centres, log in and untick the box meant for giving consent for sharing the information. The person has to authenticate the request with the biometric scanner.

  • How does one deactivate the Aadhaar card of a dead person?

At present there is no system in place to delete/deactivate Aadhaar number of a dead person. In fact, officials from the UIDAI say it is not required to delete the number at all. The Aadhaar number is unique, hence even if a person is dead, that number will not be given to anybody else. Also, the UIDAI has so far not received any request to delete an account due to the death of a person.

  • What is the system for capturing the iris of people without eyes or who lose their hands in accidents, or those who are born with any physical challenge?

While enrolling for Aadhaar, there is an option available for biometric exceptions. A person who does not have one or both the eyes or fingers needs to get his picture clicked before the camera at the enrolment centre, which would act as proof of the person’s deficiency.

If a person loses his eyesight or fingers after enrolling for Aadhaar, he/she needs to update his biometric data following the same process as above. There is no need to submit a medical certificate.

  • What care should be taken while using the Aadhaar-based payment system in order to protect individual privacy and ensure that biometric data is not misused?

Aadhaar as it is, is a secured system, according to the UIDAI. There is no scope for misusing biometric data that is used for verification in Aadhaar-based payment systems. The data stored in CIDR will only reply in ‘yes’ or ‘no’ format to the confirmation request made. Nevertheless, it is always better to be cautious and never share passwords, MPIN provided by bank for mobile transactions or anything that could give access to one’s bank account.

  • How private is one’s Aadhaar data? Are there possibilities of the Aadhaar number being misused if we have shared it as our identity or address proof?

According to the UIDAI, Aadhaar data is private and safe. Once a person provides his Aadhaar number and matches it with his biometric data, the only information that can be obtained is the confirmation of that person’s identity. Until and unless a person authenticates it with biometric data, no information shall be revealed.

However, there are certain issues pertaining to Aadhaar smart cards or plastic cards issued by private agencies. They download a person’s e-Aadhaar using various software available in the market, and get the card printed for which they charge anything between Rs 200 and 300. It is unlike what is printed at the Aadhaar office that comes with a QR code. The UIDAI is currently seizing the instruments from private agencies based on complaints received.

  • What mechanisms are in place to stop misusing of Aadhaar number/data?

First, the UIDAI is barred from revealing personal information in the Aadhaar database – the only responses permitted are ‘yes’ or ‘no’ to requests to verify an identity. The demographic and biometric data is collected on a software provided by the UIDAI and encrypted to prevent leaks in transit.

The UIDAI also claims to be having in place a comprehensive security policy to ensure the safety and integrity of its data. Severe penalty is imposed on security violation and for disclosing identity information. There will also be penal consequences for unauthorised access to CIDR – including hacking, and penalties for tampering with data in the CIDR.

  • Is there a possibility of Aadhaar data getting duplicated?

Not at all, say UIDAI officials. They negate any such possibility of duplication because of the fool proof system that mandates biometric verification for updation and payment transactions. And the database, they say is secure enough.

To prove the same, UIDAI officials give an example of a strange complaint that they received last year. A resident wanted to enrol for Aadhaar. The issue was that he had earlier mistakenly given his biometric (iris and fingerprint scan) details for his father’s demographic details. Now whenever he tries to get his Aadhaar registered, it gets rejected because the biometric details are already recorded against his father’s name. Now that his father is dead, he has raised a request to delete his father’s Aadhaar data, so that he can enrol. In such rare cases where biometric mismatch happens, deletion of data will be made.

  • Whom should you complain to in case of a biometric mismatch or any other issue related to Aadhaar?

For basic help and information related to Aadhaar enrolment and updates, residents can dial the toll free number 1947 or send an email to

For complaints related to biometric mismatch or other major issues related to one’s Aadhaar data, residents can complain to the following regional offices. Write to them with proper documentation so that they would respond.

List of other Regional Offices where complaints can be submitted:

  1. For the states of Karnataka, Kerala, Lakshadweep, Pondicherry, Tamil Nadu:

UIDAI Regional Office, Bengaluru

Khanija Bhavan, No. 49,

3rd Floor, South Wing Race Course Road,

Bengaluru – 01

  1. For the states of Delhi, Madhya Pradesh, Rajasthan, Uttarakhand:

UIDAI Regional Office, Delhi

Ground Floor,

Pragati Maidan Metro Station,

Pragati Maidan,

New Delhi – 110001

  1. For the states of Punjab, Haryana, Himachal Pradesh, J&K:

UIDAI Regional Office, Chandigarh

SCO 139-141,

3rd and 4th Floor,

Sector 17-C,

Chandigarh – 160017

  1. For the States of Assam, Arunachal Pradesh, Manipur, Mizoram, Nagaland, Sikkim, Meghalaya, Tripura:

UIDAI Regional Office, Guwahati

Block-V, First Floor,


Beltola-Basistha Road, Dispur,

Guwahati – 781 006

  1. For the states of Andhra Pradesh, Telangana, Chattisgarh, UT of Andaman and Nicobar, Odisha:

UIDAI Regional Office, Hyderabad

5th Floor, Block – III,

My Home Hub Madhapur,

Hyderabad – 500 081

  1. For the state of Uttar Pradesh:

UIDAI Regional Office, Lucknow

3rd Floor, UP State Construction & Infrastructure Devpt Corp Ltd building,

TC-46/V, Vibhuti Khand, Gomti Nagar,

Lucknow – 226 010

  1. For the states and UTs of Maharashtra, Goa, Gujarat, Dadar and Nagar Haveli, Daman and Diu:

UIDAI Regional Office, Mumbai

7th Floor, MTNL Exchange Building,

G D Somani Marg, Cuffe Parade,

Mumbai – 400 005

  1. For the states of Bihar, Jharkhand, West Bengal:

UIDAI Regional Office, Ranchi

1st Floor, RIADA Central Office Building,

Namkum Industrial Area,

Near STPI Lowadih,

Ranchi – 834 010


  1. Thanks for sharing information on how to lock aadhar biometric data ,If you lock your biometric information stored on UIDAI’s servers. This would mean that the biometric data can not be accessed by anyone else – you can unlock it whenever you need to use it for verification, and then lock it again.
    To get more click here.

  2. Sairam Dornala says:

    My fingerprints are not recognising at my college when they are taking for linking to EPASS for fee reimbursement. I completed my final year of degree but the certificates are not issued due to lack of aadhaar authentication. My latest fingerprints are updated twice recently still no effect in the college. Please help me through any other procedure 3rd year scholarship has been stopped

  3. a worried citizen says:

    my biometrics are not reflected under my aadhar card(which was made more than 2 years ago), now my it returns cannot be filed as the syatem to update the biometric details at the aadhar centres do not work. could you please look into this matter and report accordingly? also a solutions to this problem would be helpful


    how to update finger print please help me

    online mode aadhar card.


  5. Suresh R says:

    Dear Sir,

    My Name Suresh R

    My Aadhaar card no is 258755594761. I am not able to get through my bio-metric identification. I have tried with all the fingers.

    My Enrolment no.21898192426109 dated 29/06/17 time-19/08/41 where in the slip clearly says that all fingers fingerprint no matching
    I need to get corrected this problem. pls help sir

  6. Mrs Smita Mukesh Gupta says:

    Dear Sir,

    I have been to the MTNL office to link my mobile sim card no 9869362652 to my Aadhaar no 4906 6700 1396. Many times my fingers were scanned but could not link my mobile to my aadhaar as none of my fingers matched with my biometrics stored in your record.

    Kindly do needful.


  7. Arjun Dutta says:

    Due to dry skin. My fingerprints are not distinct. I need to update my fingerprints. How can i update my fingerprints.

  8. Helpless adhar card inactive due to biometric problem,D.O.B incorrect.Ican not join PAN,mobile to adhar.

  9. Helpless adhar card inactive due to biometric problem,D.O.B incorrect.Ican not join PAN,mobile to adhar.

  10. Jitendra Kumar Srivastava says:

    My adhar card no is 2879 1019 2710 my. Fingerprints are not talying with adhar card no please help me mobile no 9450968025 address already mentioned in above adhar card no which is correct

  11. pooja phophalia says:

    While trying to link adhar card with my sim the biometrics were not recognized. How to update biometrics? Please help

  12. Rupali Rajiwadekar says:

    Dear Aadhar card Authority,
    My Aadhar card is blocked due to bio metric.i had visitd aadhar card centre and provided my bio metric details but till date my card is unblocked .When i inquired at 1947 , excutive said they didn’t recive the request then again i inquired at aadhar card centre he said due to system upgradtion there are Lot of chellnges to update the request .he asked me to provide bio metric again but since last two months bio metric system are shut down from govt. Please let me know how i can unblock my aadhar card and link to account.

    • Rupali Rajiwadekar says:

      Dear Aadhar card Authority,
      My Aadhar card is blocked due to bio metric.i had visitd aadhar card centre and provided my bio metric details but till date my card is blocked .When i inquired at 1947 , customer excutive said they didn’t receive the request from aadhar card centre,then again i inquired at aadhar card centre i got reply from them due to system upgradation there are Lot of challenges to update the request. they asked me to provide bio metric again but since last two months biometric system are shut down from govt. Please let me know how i can unblock my aadhar card and link to account.

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