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What is Aadhaar?


About Aadhaar

What is Aadhaar?

Aadhaar is a 12-digit identifying number given by the Unique Identification Authority of India (UIDAI) to the residents of India after a certain verification process.
To get an Aadhaar number, individuals have to provide minimal demographic and biometric information, which include name, date of birth or age, gender, address, mobile number, and e-mail ID (optional), fingerprints, iris scans, and a facial photo.

What are the different forms of Aadhaar

UIDAI has issued multiple forms of Aadhaar, including Aadhaar letters, eAadhaar, mAadhar and Aadhaar PVC for residents. Aadhaar in all forms are valid. Indians can choose from the following: 

Aadhaar Letter

Aadhaar letter is laminated paper-based documents issued to the residents after enrolment and update. In the event of a new enrolment or a mandatory biometric update, an Aadhaar letter is issued to the resident free of charge via regular mail.
In case the Aadhaar letter is lost or destroyed, the resident can purchase a reprint from UIDAI's official website for Rs 50.


eAadhaar is a password-protected electronic copy of Aadhaar, which is digitally signed by UIDAI. The combination of the first 4 letters of name in capital and the year of birth (YYYY) are set as password. eAadhaar includes a QR code for offline verification as well as the issue and download dates.
Mask Aadhaar option allows residents to mask their Aadhaar number in downloaded e-Aadhaar. In a masked Aadhaar number, the first 8 digits of the Aadhaar number are replaced with some characters like “xxxx-xxxx” while only the last 4 digits of the Aadhaar Number are visible.
As per Aadhaar Act, e-Aadhaar is equally valid for all purposes. Residents can get their e-Aadhaar/masked e-Aadhaar from UIDAI's official website.


mAadhaar is the official mobile application developed by UIDAI to provide a platform for Aadhaar holders to carry their demographic data i.e. name, date of birth, gender and address along with photographs with them in smartphones. It features a QR code that may be used to verify it offline.
mAadhaar can be installed on all smartphones working on iOS version 10.0 and above and Android version 5.0 and above. A user can add a maximum of three profiles on one device, provided all three profiles have the same mobile number registered in their Aadhaar. This is valid in cases where members of a family have the same mobile number registered as the mAadhaar user’s in their Aadhaar.
mAadhaar app can be used anywhere anytime within India. mAadhaar is more than an Aadhaar card in a wallet. The mAadhaar app can be used for biometric data locking/unlocking, sharing QR code and eKYC data, updating the Aadhaar profile and more.

Aadhaar PVC Card

Aadhaar PVC card was introduced by UIDAI in October 2020. It is easy to carry and durable. The PVC-based Aadhaar Card is a plastic card, which has a digitally signed secure QR code with photograph and demographic details with multiple security features.
This form of Aadhaar can be ordered online using an Aadhaar number, virtual ID or enrolment ID by paying a charge of Rs 50. After application, the card is delivered to the registered address by post.

Latest Updates on Aadhaar

How to update Aadhaar address online and offline: A step by step guide

3 min read Last Updated :Apr 10 2024 | 3:35 PM IST
Cash at your doorstep: Get post office delivery via Aadhaar ATM service

4 min read Last Updated :Apr 11 2024 | 12:53 PM IST
EC issues guidelines for genuine electors to cast vote without voter I-card

2 min read Last Updated :Apr 04 2024 | 4:36 PM IST
Update Aadhaar Card for free till March 14, here are the simple steps

3 min read Last Updated :Mar 04 2024 | 5:47 PM IST
Digital payments: 'A shift in focus crucial to drive next phase of growth'

15 min read Last Updated :Feb 27 2024 | 12:36 AM IST
Mamata Banerjee announces alternate Aadhaar card upon deactivation

3 min read Last Updated :Feb 21 2024 | 2:27 PM IST
Intimations issued to cardholders, but no Aadhaar number cancelled: UIDAI

2 min read Last Updated :Feb 19 2024 | 9:36 PM IST
Mamata writes to PM, questions govt's intention behind Aadhaar deactivation

3 min read Last Updated :Feb 19 2024 | 6:31 PM IST
Govt collects Rs 600 crore penalty for delay in PAN-Aadhaar linking

2 min read Last Updated :Feb 05 2024 | 4:37 PM IST
New Aadhaar rule may allow online mobile number change; check all updates

3 min read Last Updated :Jan 19 2024 | 12:05 PM IST
Aadhaar will not be considered as valid proof of date of birth: EPFO

1 min read Last Updated :Jan 18 2024 | 6:50 PM IST
Will penalise states not MGNREGA workers if not linked with ABPS: Minister

4 min read Last Updated :Jan 02 2024 | 8:16 PM IST
HC asks Centre to consider representation for linking property with Aadhaar

2 min read Last Updated :Dec 21 2023 | 2:50 PM IST
Rs 50k penalty, suspension for overcharging Aadhaar services: Govt

2 min read Last Updated :Dec 14 2023 | 12:41 AM IST
Aadhaar enrolment possible with iris scan if fingerprint unavailable: Govt

2 min read Last Updated :Dec 09 2023 | 7:14 PM IST
ONDC poised to democratise e-com, generate $250-300 bn in GMV: Redseer

5 min read Last Updated :Dec 07 2023 | 10:17 PM IST
New SIM Card Rules to be implemented from December 1, check the details

3 min read Last Updated :Nov 30 2023 | 10:33 AM IST
Masked Aadhaar explained: How to hide your Aadhaar number for more security

3 min read Last Updated :Nov 28 2023 | 1:15 PM IST
'Every adult should be able to avail of credit through DPI by 2030'

2 min read Last Updated :Nov 06 2023 | 11:20 PM IST
Jeevan Pramaan Patra: 5 convenient ways to submit your life certificate

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