UIDAI Website – Official Aadhaar Portal & Services

What Is the UIDAI Website?

The UIDAI website, accessible at uidai.gov.in, is the official online portal of the Unique Identification Authority of India (UIDAI) — the statutory body established under the Aadhaar (Targeted Delivery of Financial and Other Subsidies, Benefits and Services) Act, 2016. It serves as the primary digital interface through which Indian residents interact with the Aadhaar ecosystem: downloading their Aadhaar card, updating demographic and biometric details, verifying Aadhaar authenticity, managing consent, and accessing grievance redressal mechanisms. Every core Aadhaar-related transaction that does not require a physical enrollment center can be initiated or completed through this portal.

The Governing Body Behind the Portal

UIDAI operates under the Ministry of Electronics and Information Technology (MeitY), Government of India. It was originally established by an executive order in 2009 and was given statutory status through the Aadhaar Act of 2016. The authority is responsible for issuing 12-digit unique identification numbers — Aadhaar numbers — to residents of India, and the website is its primary public-facing instrument for service delivery. As of 2024, over 1.37 billion Aadhaar numbers have been issued, making uidai.gov.in one of the most consequential government portals in the world by user base.

Why the UIDAI Website Matters

The portal matters for several distinct reasons that go beyond simple administrative convenience:

• Legal identity access: For millions of residents, Aadhaar is their primary or only government-issued identity document. The website is the fastest way to retrieve, update, or verify that identity without visiting a physical office.
• Gateway to subsidies and welfare: Direct Benefit Transfer (DBT) schemes — including LPG subsidies, MGNREGS wage payments, and PM-KISAN transfers — are linked to Aadhaar. Any mismatch in Aadhaar data can block payments, and the website is where corrections are made.
• Financial and telecom compliance: Banks, mobile operators, and financial institutions use Aadhaar-based eKYC to onboard customers. The UIDAI website allows residents to lock or unlock their biometrics and manage which agencies have authentication access.
• Judicial and regulatory compliance: The Supreme Court's 2018 judgment in Justice K.S. Puttaswamy vs. Union of India upheld Aadhaar's constitutional validity while strengthening privacy protections. The website operationalizes those protections through features like Virtual ID generation and biometric locking.
• Reduced administrative friction: Services that previously required multiple visits to enrollment centers — such as address updates — can now be completed online, reducing the burden on both residents and government infrastructure.

How the UIDAI Website Works: Architecture and Service Logic

The UIDAI website is not a static information portal. It is a transactional platform built on a layered architecture that connects the front-end resident interface to UIDAI's Central Identities Data Repository (CIDR) — the encrypted, centralized database that stores all Aadhaar-linked demographic and biometric data.

Authentication Mechanisms

Access to most services on uidai.gov.in requires identity verification. The portal uses two primary authentication methods:

• OTP-based authentication: A one-time password is sent to the mobile number registered with the resident's Aadhaar. This is the most commonly used method for services like e-Aadhaar download, address update, and Virtual ID generation.
• TOTP (Time-based One-Time Password): Available through the mAadhaar mobile application, this method generates a temporary password without requiring SMS delivery — useful in areas with poor cellular connectivity.

Notably, several services are accessible without OTP — such as Aadhaar verification using name and date of birth, or checking enrollment status — because they do not expose sensitive personal data.

The My Aadhaar Portal: Core Service Hub

The primary resident-facing section of uidai.gov.in is branded as "My Aadhaar." This section organizes all self-service functions into logical categories. Services are delivered through a combination of web forms, document upload interfaces, and real-time database queries to the CIDR. The portal enforces rate limits and session timeouts to prevent misuse, and all transactions are logged for audit purposes under the Aadhaar Act's data protection provisions.

Service Delivery Workflow

A typical service interaction on the UIDAI website follows this sequence:

1. The resident navigates to the relevant service under the My Aadhaar section.
2. The resident enters their 12-digit Aadhaar number or 16-digit Virtual ID.
3. An OTP is dispatched to the registered mobile number (or TOTP is generated via mAadhaar).
4. Upon successful authentication, the service interface is unlocked.
5. The resident submits the required information or document.
6. A Service Request Number (SRN) is generated for tracking.
7. Changes are reflected in the CIDR after verification, typically within 30 to 90 days for demographic updates, and near-instantly for logical operations like biometric locking.

Key Services Available on uidai.gov.in

Service Category	Specific Service	OTP Required	Fee (as of 2024)
Download	e-Aadhaar download (PDF)	Yes	Free
Update	Address update online	Yes	₹50
Update	Name, DOB, gender update (via enrollment center)	No (in-person)	₹50
Virtual ID	Generate or retrieve 16-digit VID	Yes	Free
Biometric Lock	Lock/unlock biometrics	Yes	Free
Aadhaar Lock	Lock/unlock Aadhaar number	Yes	Free
Verification	Verify Aadhaar number existence	No	Free
Authentication History	View last 50 authentication records	Yes	Free
Enrollment	Check enrollment/update status	No	Free
Retrieve	Find lost Aadhaar number (EID/UID retrieval)	Yes	Free

The Central Identities Data Repository (CIDR)

Every action on the UIDAI website ultimately reads from or writes to the CIDR, which is maintained exclusively by UIDAI. The CIDR stores biometric data (ten fingerprints, two iris scans, and a facial photograph) alongside demographic data (name, date of birth, gender, address, and optionally mobile number and email). Critically, the CIDR does not store information about religion, caste, income, health, or financial accounts — a legal prohibition under Section 32 of the Aadhaar Act. This architectural boundary is enforced at the database level, not merely as policy.

Biometric data transmitted during authentication is encrypted end-to-end and is never returned to the requesting agency. Authentication responses from the CIDR are binary — yes or no — ensuring that even authorized third parties cannot reconstruct a resident's biometric profile from repeated queries.

Privacy and Security Infrastructure

The UIDAI website incorporates several technical privacy controls that distinguish it from a standard government information portal:

• Virtual ID (VID): A 16-digit revocable number that can be used in place of the Aadhaar number for authentication, preventing the Aadhaar number itself from being shared with service providers.
• Biometric locking: Residents can permanently disable biometric authentication for their Aadhaar, allowing only OTP-based verification. This protects against unauthorized biometric use at enrollment centers or authentication terminals.
• Aadhaar number locking: The Aadhaar number itself can be locked, making it unusable for any authentication until the resident unlocks it — typically using the VID as a substitute.
• Authentication history: Residents can review a log of every authentication event associated with their Aadhaar, including the date, time, and type of authentication, providing transparency about who has queried their identity.
• HTTPS and CAPTCHA enforcement: All pages on uidai.gov.in are served over HTTPS with valid SSL certificates issued under the National Informatics Centre (NIC) certificate authority. CAPTCHA challenges are applied to prevent automated scraping.

Who Uses the UIDAI Website and Why

The portal serves four distinct user groups, each with different needs:

• Individual residents: The largest group, using the portal to download e-Aadhaar, update addresses, generate VIDs, and check authentication history.
• Enrollment agencies and operators: Certified entities that use the portal's operator-facing sections to manage enrollment appointments and submit update requests on behalf of residents at physical centers.
• Authentication User Agencies (AUAs) and KYC User Agencies (KUAs): Banks, telecom companies, and other licensed entities that integrate with UIDAI's authentication API. They access documentation, compliance guidelines, and technical specifications through the website.
• Researchers and policymakers: The website publishes Aadhaar enrollment statistics, annual reports, circulars, and regulatory orders that are referenced in academic and policy research.

How to Use the UIDAI Website Effectively: A Complete Step-by-Step Guide

The UIDAI website at uidai.gov.in handles every major Aadhaar service through a structured portal called myAadhaar. To get results without wasted effort, log in with your registered mobile number OTP, complete your task in one session, and download or save any reference or acknowledgement number before closing the browser.

Step 1: Access the Correct Official Portal

Always begin at https://uidai.gov.in or directly at https://myaadhaar.uidai.gov.in. Dozens of unofficial sites mimic the UIDAI interface to collect personal data or charge fees for free services. Verify the URL shows gov.in and a valid SSL certificate before entering any information.

• Bookmark the official URL to avoid phishing sites in search results.
• Do not use third-party apps or aggregator portals for services available directly on uidai.gov.in.
• The UIDAI website is fully functional on mobile browsers; a separate app is not required for most services.

Step 2: Understand the Portal Layout Before You Start

The UIDAI homepage is divided into distinct functional zones. Knowing where each service lives saves time and prevents navigating to the wrong section.

Section on Website	Services Available	Login Required
myAadhaar Portal	Update demographics, download e-Aadhaar, order PVC card, check update status	Yes – OTP on registered mobile
Verify Aadhaar	Confirm that an Aadhaar number exists and is active	No
Verify Email/Mobile	Check if your email or phone is linked to Aadhaar	No – only Aadhaar number and OTP needed
Aadhaar Authentication History	View recent authentication transactions on your Aadhaar	Yes – OTP on registered mobile
Lock/Unlock Aadhaar	Temporarily lock biometric or Aadhaar number	Yes – OTP on registered mobile
Enrolment Centre Locator	Find nearby Aadhaar centres for in-person updates	No
Check Aadhaar Status	Track enrolment or update request using EID or SRN	No

Step 3: Log In to myAadhaar

1. Go to myaadhaar.uidai.gov.in and click Login.
2. Enter your 12-digit Aadhaar number.
3. Complete the CAPTCHA displayed on screen.
4. Click Send OTP. The one-time password arrives on your Aadhaar-registered mobile number within 60 seconds.
5. Enter the OTP and click Login. The session remains active for a limited time, so complete your task promptly.

If your mobile number is not registered with Aadhaar, you cannot log in to myAadhaar online. You must visit an Aadhaar Enrolment Centre or an Aadhaar Seva Kendra to update or register your mobile number in person. There is no workaround for this requirement.

Step 4: Update Aadhaar Details Online

Online updates through myAadhaar are available for name, date of birth, gender, address, and language. Biometric updates (fingerprints, iris, photograph) require a physical visit to an enrolment centre.

1. After logging in, select Update Aadhaar Online from the dashboard.
2. Choose the field you want to update — for example, address.
3. Enter the corrected information carefully. Spelling must match your supporting document exactly.
4. Upload a scanned copy or clear photograph of the supporting document. Accepted formats are JPG, JPEG, PNG, and PDF. Maximum file size is typically 2 MB per document.
5. Review all details on the preview screen before submitting.
6. Pay the service fee of ₹50 (including GST) using debit card, credit card, net banking, or UPI.
7. Save the Service Request Number (SRN) shown after successful submission. This is your tracking reference.

Step 5: Download Your e-Aadhaar

1. From the myAadhaar dashboard, select Download Aadhaar.
2. Choose whether to download a regular e-Aadhaar or a masked e-Aadhaar (which hides the first eight digits of your Aadhaar number for privacy).
3. Verify your identity using OTP sent to your registered mobile.
4. The PDF downloads automatically. The password to open the PDF is your name's first four letters in capitals followed by your birth year — for example, RAJE1990 for someone named Rajesh born in 1990.

Step 6: Order an Aadhaar PVC Card

The PVC card is a wallet-sized, durable physical card with a QR code. It can be ordered even if your registered mobile number has changed, using an alternative verification method.

1. Select Order Aadhaar PVC Card from myAadhaar.
2. Verify your details and confirm the delivery address shown on your Aadhaar record.
3. Pay ₹50 (including GST and speed post charges).
4. Note the order reference number. The card is delivered by India Post within 5–10 working days.

Step 7: Lock or Unlock Your Aadhaar

Locking your Aadhaar prevents anyone from authenticating using your Aadhaar number until you unlock it. This is a strong security measure if you suspect misuse.

1. Navigate to Lock/Unlock Aadhaar on the myAadhaar dashboard.
2. To lock biometric data only, select Lock Biometrics. This stops fingerprint and iris authentication but allows OTP-based authentication to continue.
3. To lock your Aadhaar number entirely, use the Lock Aadhaar option. You will receive a 16-digit Virtual ID (VID) that can be used in place of your Aadhaar number for most services.
4. Unlock follows the same path — select Unlock and verify with OTP.

Common Mistakes to Avoid on the UIDAI Website

Most failed transactions and rejected update requests on the UIDAI website result from a small set of avoidable errors. The list below covers the most frequent problems reported by users.

Mistakes During Login and Authentication

• Using a mobile number not linked to Aadhaar. The OTP goes only to the registered number. If you have changed your number and not updated it, you cannot complete OTP-based login at all.
• Entering the Aadhaar number with spaces. The system accepts 12 continuous digits. Spaces cause an authentication error.
• Waiting too long to enter the OTP. OTPs expire in 10 minutes. If you do not receive it promptly, request a fresh one rather than entering an expired code.
• Using outdated browsers. The myAadhaar portal requires JavaScript and modern TLS support. Internet Explorer and very old Chrome versions produce session errors.

Mistakes During Document Upload for Updates

• Uploading blurry or low-contrast photographs of documents. The UIDAI review team rejects documents where text is not clearly legible. Use a scanner or hold the phone steady in good light.
• Submitting a document that does not match the field being updated. If you are updating your name, the document must show the new name. A document showing your old name will result in rejection.
• Uploading a file larger than the permitted size. Compress the image before uploading if it exceeds 2 MB. Many free tools can reduce file size without affecting readability.
• Using an unsupported document type. UIDAI publishes a specific list of valid Proof of Identity, Proof of Address, and Proof of Date of Birth documents. A utility bill, for instance, is valid for address but not for name correction.

Mistakes When Checking Update Status

• Confusing EID with SRN. The Enrolment ID (EID) is a 28-digit number given at physical enrolment centres. The Service Request Number (SRN) is given for online update requests. Using one in place of the other returns no result.
• Checking status too early. Online updates typically take 5 to 30 working days to process. Checking within the first 48 hours usually shows only a submission confirmation, not a final outcome.

Mistakes Related to Security and Privacy

• Sharing your Aadhaar number on unofficial platforms. Many websites offer to download e-Aadhaar or check Aadhaar status but are not affiliated with UIDAI. These sites harvest personal data.
• Not locking biometrics when not in active use. Biometric authentication fraud is possible if your fingerprints are compromised. Locking biometrics on the UIDAI website costs nothing and takes under two minutes.
• Ignoring authentication history alerts. Check your authentication history periodically under myAadhaar. Unfamiliar entries — especially biometric authentications you did not initiate — should be reported to UIDAI immediately at 1947.
• Photocopying Aadhaar without the masked version. When submitting a photocopy to a third party, always use the masked e-Aadhaar. Write the purpose and date on the photocopy to prevent misuse.

Practical Tactics for Faster and Smoother UIDAI Transactions

Beyond following the correct steps, several practical habits consistently reduce friction when using the UIDAI website.

Prepare Documents Before Starting a Session

Gather and scan all required documents before opening the UIDAI portal. Sessions time out after a period of inactivity, and uploading documents mid-session on a slow connection is a common cause of incomplete submissions.

Use the UIDAI Grievance Portal for Stuck Requests

If an update request shows no change in status after 30 working days, file a grievance at grievances.uidai.gov.in rather than resubmitting the same request. Duplicate submissions create confusion in the system and do not speed up processing.

Generate a Virtual ID for Routine Use

The Virtual ID (VID) is a temporary 16-digit number that maps to your Aadhaar. Generate one from the myAadhaar portal and use it wherever Aadhaar authentication is required for routine services. This keeps your actual Aadhaar number private and reduces exposure.

Verify Linked Mobile and Email Periodically

Use the Verify Email/Mobile tool on uidai.gov.in at least once a year to confirm your contact details are correctly linked. If you have changed your phone number, schedule an in-person update at an enrolment centre before you need to use any online Aadhaar service urgently.

Contact UIDAI Support Through Official Channels Only

• Toll-free helpline: 1947 (available in multiple languages)
• Email: help@uidai.gov.in
• Grievance portal: grievances.uidai.gov.in
• Twitter/X: @UIDAI (for general queries, not for sharing personal data)

Tools, Portals, and Automation for UIDAI Website Services

The UIDAI website at uidai.gov.in provides a centralized suite of self-service tools that residents can use without visiting an enrollment center. These tools cover Aadhaar verification, update requests, download, and grievance filing. Understanding which tool to use for which task saves significant time and prevents errors.

Core Self-Service Tools Available on uidai.gov.in

• Aadhaar Download (eAadhaar): Generates a password-protected PDF of your Aadhaar card using your Aadhaar number, VID, or enrollment ID. The password is a combination of the first four letters of your name in capitals and your birth year.
• Virtual ID (VID) Generator: Creates or retrieves a 16-digit VID that can replace your Aadhaar number during authentication, protecting your core identity number from unnecessary exposure.
• Aadhaar Verification: Allows any individual or agency to confirm whether an Aadhaar number exists in the UIDAI database without revealing personal details.
• Check Aadhaar Status: Tracks the processing stage of a new enrollment or update request using the 28-digit enrollment ID printed on your acknowledgment slip.
• Address Update Online: Lets residents submit a new address with a supporting document directly through the portal, bypassing the need for an in-person visit.
• Name, Gender, and Date of Birth Update: Requests demographic corrections by uploading scanned proof documents; subject to UIDAI's document acceptance list.
• Mobile Number Update Online (OTP-based): Available only when the existing registered mobile number is active; sends an OTP to the current number for verification before updating.
• Aadhaar PVC Card Order: Allows residents to order a durable, credit-card-sized PVC Aadhaar for a nominal fee of ₹50, delivered by post.
• Lock/Unlock Aadhaar: Temporarily disables biometric authentication linked to your Aadhaar number, a critical security feature if you suspect misuse.
• Grievance / Complaint Filing: Submits complaints about enrollment delays, update rejections, or operator misconduct directly to UIDAI's redressal system.

mAadhaar App: Mobile Extension of the UIDAI Portal

The official mAadhaar app, available on Android and iOS, replicates most portal functions on a smartphone. It stores a digital Aadhaar profile, generates Time-based OTPs (TOTP) for authentication without SMS dependency, and allows biometric locking directly from the phone. The app is linked to a registered mobile number and supports multiple profiles on a single device, making it useful for families.

Aadhaar Authentication History

One underused but important tool on the UIDAI website is the Authentication History section. It shows the last 50 authentication transactions performed against your Aadhaar number, including the date, time, authentication type (OTP, biometric, demographic), and the agency that performed it. Reviewing this regularly helps detect unauthorized use.

How AutoSEO Automates UIDAI-Related Content and Monitoring

For organizations that publish guides, compliance documentation, or help content related to UIDAI services — such as banks, fintech platforms, insurance companies, and government service aggregators — keeping that content accurate is a continuous challenge. UIDAI updates its portal structure, document acceptance lists, fee schedules, and service URLs periodically, and outdated content creates user confusion and support overhead.

AutoSEO addresses this by automating the content lifecycle for UIDAI-related pages. It monitors source pages on uidai.gov.in for structural and textual changes, flags when critical information such as update fees, accepted documents, or portal URLs has changed, and triggers content refresh workflows automatically. For teams managing large knowledge bases or help centers that reference Aadhaar processes, AutoSEO reduces the manual audit cycle from weeks to hours.

AutoSEO also handles structured data markup for UIDAI-related FAQ and how-to content, ensuring that pages are eligible for Google's AI Overviews and rich results. It identifies which questions users are actually searching about UIDAI services, clusters them by intent, and maps them to the correct content sections — so a page about Aadhaar address update ranks for every meaningful variant of that query, not just the exact phrase.

How to Measure Success When Using UIDAI Website Services

Success on the UIDAI portal is not just about completing a transaction — it means confirming that the change was applied, that your Aadhaar record reflects the correct data, and that future authentication will work without issues. Here is how to verify outcomes at each stage.

Metrics and Checkpoints for Common Tasks

Task Completed	How to Confirm Success	Typical Timeframe
Aadhaar Download (eAadhaar)	PDF opens with correct name, photo, and Aadhaar number; QR code scans correctly	Immediate
Address Update Submitted	URN (Update Request Number) received via SMS; status shows "Update Accepted" on portal	2–30 days for processing
Mobile Number Update	OTP received on new number; login to mAadhaar works with new number	Immediate to 24 hours
Biometric Lock Activated	Confirmation SMS received; biometric authentication attempts fail as expected	Immediate
PVC Card Ordered	Order ID received; tracking available via India Post after dispatch	5–10 business days
New Enrollment	Aadhaar number generated and sent to registered mobile; status shows "Aadhaar Generated"	Up to 90 days
Grievance Filed	Complaint ID received; status updates visible in grievance portal	Resolution in 30 days typically

Verifying Data Accuracy After an Update

After any demographic update is processed, download a fresh eAadhaar from the portal and compare every field against your submitted documents. Check the name spelling, date of birth format, address pincode, and photo. If any discrepancy exists, file a correction immediately using the same update pathway — do not wait, as subsequent authentication failures at banks or government offices can create cascading problems.

Using Authentication History as a Success Indicator

After linking Aadhaar to a service (bank account, PAN, mobile number), check the Authentication History tool within 48 hours. A successful linkage will appear as a demographic or OTP authentication event from the relevant agency. If no such record appears, the linkage may not have completed on the agency's side and should be followed up directly.

FAQ

What is the official UIDAI website address?

The official website of the Unique Identification Authority of India is uidai.gov.in. This is the only government-authorized portal for Aadhaar-related services including download, update, verification, and grievance filing. Any other website claiming to offer Aadhaar services is unofficial and potentially fraudulent. Always verify the URL begins with https://uidai.gov.in before entering personal information.

Can I update my Aadhaar details entirely online without visiting a center?

Yes, for address updates, the UIDAI website supports a fully online process where you upload a supporting document and submit the request. For name, date of birth, and gender corrections, online submission is also available but requires uploading valid proof documents. Mobile number updates are online only if your current registered number is active. Biometric updates (fingerprints, iris scans, photograph) must be done in person at an Aadhaar Seva Kendra or authorized enrollment center.

What documents are accepted for address update on the UIDAI website?

UIDAI accepts a specific list of documents for address proof. Commonly accepted documents include a passport, bank statement or passbook, post office account statement, ration card, voter ID, driving license, government-issued photo ID with address, utility bills (electricity, water, telephone — not older than 3 months), property tax receipt, and a letter from a recognized authority or public representative. The complete and current list is published in the document section of uidai.gov.in, and it is advisable to check it before submitting since the list is updated periodically.

How do I check if my Aadhaar update request has been processed?

Go to uidai.gov.in and navigate to My Aadhaar > Check Aadhaar Update Status. Enter your 28-digit enrollment ID or the URN (Update Request Number) sent to your registered mobile after submission. The portal will display the current status: received, under process, or update accepted. If the status shows rejection, a reason is usually provided, and you can resubmit with corrected documents.

Is the eAadhaar downloaded from the UIDAI website legally valid?

Yes. The eAadhaar is a digitally signed document issued by UIDAI and is legally equivalent to the physical Aadhaar card under the Aadhaar Act, 2016. It carries a digital signature that can be verified using a PDF reader that supports digital certificate validation. Government agencies, banks, telecom operators, and other entities are required to accept eAadhaar as valid proof of identity and address.

What should I do if my registered mobile number is not linked to Aadhaar?

If you do not have a registered mobile number on your Aadhaar record, you cannot use OTP-based services on the UIDAI website. You must visit the nearest Aadhaar Seva Kendra or authorized enrollment center to add or update your mobile number biometrically. Once added, it typically reflects within 24–72 hours and you can then use all online services. Use the Locate Enrollment Centre feature on uidai.gov.in to find the nearest center.

How does the Aadhaar biometric lock feature work on the UIDAI website?

The biometric lock feature, accessible under My Aadhaar > Aadhaar Services > Lock/Unlock Biometrics, disables the use of your fingerprints and iris scan for authentication. Once locked, no agency can authenticate you using biometrics until you unlock it. This is useful if you suspect your biometric data has been compromised. The lock and unlock actions are both performed using an OTP sent to your registered mobile number, and the change takes effect immediately.

What is a Virtual ID (VID) and why should I use it?

A Virtual ID is a temporary, revocable 16-digit number generated on the UIDAI website that can be used in place of your actual Aadhaar number for authentication and KYC purposes. When you share a VID, the service provider can verify your identity without ever seeing your actual Aadhaar number. You can generate a new VID at any time, which automatically invalidates the old one. Using VID is a recommended privacy practice, particularly when sharing identity details with private entities.

How do I file a complaint or grievance on the UIDAI website?

Visit uidai.gov.in and go to Contact & Support > File a Complaint. You can submit complaints about enrollment delays, update rejections, operator misconduct, authentication failures, or data discrepancies. You will need your enrollment ID or Aadhaar number and a description of the issue. After submission, a complaint reference number is generated. You can track the status using the same portal. Alternatively, complaints can be filed by calling the UIDAI toll-free helpline at 1947 or by emailing help@uidai.gov.in.

Can non-Indian citizens or foreign nationals use the UIDAI website to enroll for Aadhaar?

Aadhaar enrollment is available to residents of India, which includes foreign nationals who have been resident in India for 182 days or more in the 12 months immediately preceding the date of application. The UIDAI website provides information about the enrollment process, but the actual enrollment must be completed in person at an authorized center with valid residency and identity documents. Foreign nationals cannot use the online update portal for demographic changes until they have an active Aadhaar number with a registered mobile number.