Has your child recently turned 5 years old or 15 years old? If yes, you may have received a message asking you to complete the Mandatory Biometric Update (MBU) for your child’s Aadhaar.
Many parents are confused after receiving this notification. They wonder:
- Is the biometric update really mandatory?
- What happens if I do not update it?
- Which documents are required?
- Is there any fee?
- Can it be done online?
In this guide, you will learn everything about the Mandatory Biometric Update (MBU) in simple language. Whether your child is turning 5 years or 15 years, this article explains the complete process step by step.
What Is a Mandatory Biometric Update (MBU)?
The Mandatory Biometric Update (MBU) is the process of updating a child’s biometric information in the Aadhaar database.
Biometric information includes:
- Fingerprints
- Iris scan (both eyes)
- Photograph
Unlike demographic details such as name or address, biometric information changes as children grow. That is why UIDAI requires biometric updates at specific ages.
Why Is the Biometric Update Mandatory?
When a child is enrolled for Aadhaar before the age of 5 years, fingerprints and iris scans are generally not collected because these biometrics are still developing.
Only a photograph and demographic details are recorded.
As the child grows, fingerprints and iris patterns become more stable. Therefore, UIDAI requires fresh biometric data to maintain the accuracy of the Aadhaar record.
Similarly, another update is required when the child turns 15 years old, as physical growth during childhood and adolescence may significantly change biometric characteristics.
At What Ages Is the Mandatory Biometric Update Required?
There are two important stages.
| Child’s Age | Biometric Update Required | Purpose |
|---|---|---|
| Around 5 years | Yes | First biometric capture (fingerprints and iris) |
| Around 15 years | Yes | Update biometrics after physical growth |
Parents should complete the update as soon as possible after the child reaches the applicable age.
Why Does UIDAI Require Two Biometric Updates?
Children grow quickly.
Their physical features continue changing during childhood.
For example:
- Fingerprints become clearer.
- Iris patterns stabilize.
- Facial appearance changes with age.
Updating these biometrics helps improve Aadhaar authentication accuracy.
What Biometrics Are Updated?
During the Mandatory Biometric Update, the operator captures:
- All ten fingerprints
- Iris scan of both eyes
- Latest photograph
These records replace or supplement the earlier biometric information according to UIDAI’s enrollment process.
Is the Mandatory Biometric Update Different from a Normal Aadhaar Update?
Yes.
A normal Aadhaar update may involve changing details such as:
- Name
- Address
- Mobile number
- Date of birth (subject to UIDAI rules)
- Email address
A Mandatory Biometric Update specifically focuses on biometric information required at the prescribed ages.
What Happens If You Do Not Complete the Mandatory Biometric Update?
If the mandatory update is not completed after the applicable age:
- Aadhaar authentication using biometrics may not work correctly.
- Some services that rely on biometric authentication may become difficult to access.
- UIDAI may continue reminding you to complete the update.
Completing the update on time helps keep the Aadhaar record accurate and reduces authentication problems.
People Also Read: Uidai Biometric Update Error List And Solution
How Do You Know If Your Child Needs a Biometric Update?
You may receive:
- SMS from UIDAI
- Email notification (if registered)
- Information during Aadhaar authentication
- Advice from an Aadhaar Seva Kendra
Even if you do not receive a message, you can check your child’s age and determine whether the update is due.
People Also Read: Common Biometric Update Problems in Children
Who Must Visit the Aadhaar Centre?
For children, the biometric update must be completed in person because fingerprints, iris scans, and a photograph need to be captured.
A parent or guardian should accompany the child during the visit.
Can the Mandatory Biometric Update Be Done Online?
No.
Since fingerprints, iris scans, and a live photograph must be captured using certified biometric devices, the Mandatory Biometric Update cannot be completed entirely online.
You must visit an authorised Aadhaar Seva Kendra or Aadhaar Enrollment Centre.
Documents Required for Mandatory Biometric Update
In many cases, the Aadhaar number or Aadhaar letter/card is enough to identify the child for the biometric update. However, carrying supporting documents can help if the operator needs verification.
It is useful to carry:
| Document | Purpose |
|---|---|
| Child’s Aadhaar | Identification |
| Aadhaar acknowledgement (if available) | Reference |
| Parent/Guardian Aadhaar | Identity verification if required |
| Registered mobile number | To receive OTPs or status updates, where applicable |
If there has also been a demographic change (such as a name correction), additional documents may be required according to UIDAI rules.
Is There Any Fee for Mandatory Biometric Update?
UIDAI has specific fee rules for Aadhaar updates.
The applicable fee depends on the type of update and whether it falls under the mandatory update process. It is always best to confirm the current charges at the Aadhaar Seva Kendra or through the official UIDAI fee schedule before your visit.
Do not pay any amount beyond the officially prescribed fee.
Always collect the payment receipt.
How Long Does the Biometric Update Take?
The biometric capture itself usually takes only a few minutes.
The overall visit may take longer depending on:
- Waiting time
- Number of visitors
- Verification process
- Technical issues
After submission, UIDAI processes the update before it becomes active.
Step-by-Step Process for Mandatory Biometric Update
Step 1: Visit an Authorised Aadhaar Centre
Go to an authorised Aadhaar Seva Kendra or Enrollment Centre with your child.
Step 2: Verify Aadhaar Details
The operator verifies the child’s Aadhaar information.
Step 3: Capture Fingerprints
All ten fingerprints are scanned using a biometric device.
Step 4: Iris Scan
Both eyes are scanned carefully.
Children should look directly at the scanner.
Step 5: Photograph
A new photograph is taken.
The child should sit still and look at the camera.
Step 6: Verify Information
Before submission, check all displayed details carefully.
If you notice any mistake, inform the operator immediately.
Step 7: Collect the Acknowledgement Slip
After the update request is submitted, collect the acknowledgement slip.
Keep it safe until the update is completed.
Common Problems During Child Biometric Update
Some children become nervous during biometric capture.
Common issues include:
- Child keeps moving
- Fingers not placed properly
- Eyes not looking at the scanner
- Child becomes scared
- Fingerprints difficult to capture
These issues are usually solved by allowing the child to relax and following the operator’s instructions patiently.
Tips for Parents Before Visiting the Aadhaar Centre
To make the process smoother:
- Visit during non-peak hours if possible.
- Ensure the child is well-rested.
- Explain the process in simple words.
- Clean the child’s hands before fingerprint scanning.
- Carry water and light snacks for younger children if waiting times are long.
- Keep the acknowledgement slip safely after the visit.
Frequently Asked Questions
Is the biometric update compulsory at age 5?
Yes. UIDAI requires the first mandatory biometric update around the age of 5 because fingerprints and iris scans are collected at this stage.
Why is another update required at age 15?
As children grow, their biometric features become more mature. Updating them improves authentication accuracy.
Can I update my child’s biometrics before turning 5?
The mandatory update is linked to the prescribed age milestone. If you have a special situation, consult an authorised Aadhaar Seva Kendra for guidance.
Can grandparents take the child?
A responsible guardian may accompany the child. If there are any verification requirements, the Aadhaar centre will advise what documents are needed.
Is an appointment necessary?
Appointment availability depends on the Aadhaar centre. Some centres accept walk-in visits, while others may offer or recommend appointments.
The Mandatory Biometric Update is an important step in keeping your child’s Aadhaar record accurate. It is required around 5 years of age and again around 15 years of age because children’s biometric features change as they grow.
By visiting an authorised Aadhaar Seva Kendra, carrying the necessary documents, and following the correct process, parents can complete the update smoothly.
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