Unique Identification Authority of India

UIDAI Full Form in English, letter by letter

UIDAI is the Unique Identification Authority of India, the statutory body that issues Aadhaar numbers and runs the Aadhaar system.

UIDAI Full Form in Indian Languages

The twelve-digit number in your wallet was issued by the UIDAI, the Unique Identification Authority of India, the statutory body that runs Aadhaar. Its name is shown below in six Indian languages.

What UIDAI is and when it was set up

The Unique Identification Authority of India was set up in January 2009 by an executive decision of the central government, to give every resident a verifiable identity number. It first worked as an office attached to the Planning Commission. The Aadhaar Act of 2016, passed by Parliament in March that year, gave it statutory status.

UIDAI is now an authority under the Ministry of Electronics and Information Technology, headed by a Chairperson with a Chief Executive Officer. Its purpose is to maintain the Central Identities Data Repository: enrolling residents, storing their records and answering authentication requests.

What the Aadhaar number is, and what it is not

The number has 12 digits, is generated randomly and cannot be reassigned. Enrolment records ten fingerprints, both iris scans and a photograph, along with name, date of birth, address and gender.

UIDAI itself says that Aadhaar is not proof of citizenship, domicile or date of birth. It proves that a person holds that number. Any resident who has lived in India for 182 days or more in the 12 months before applying can enrol, and NRIs holding a valid Indian passport can enrol as well.

Aadhaar-linked services also rely on the mobile number you register. If your number has changed, update it at an Aadhaar centre, because the OTP for online services goes only to the registered number. For children, biometric updates are recommended at ages 5 and 15, since fingerprints and iris change as a child grows, and a child under five is issued a Baal Aadhaar without biometrics.

One more detail: authentication by OTP needs your registered mobile number, while a fingerprint check needs a working scanner at the service point.

How Aadhaar is used day to day

Authentication and e-KYC

Authentication happens by fingerprint, iris, one-time password or a match of demographic details, and returns only a yes or no with a reference number. e-KYC lets a bank or telecom operator fetch your name and address directly, with your consent, replacing paperwork with a digital check done in seconds.

Benefits and payments

Under the Aadhaar Act, benefits and subsidies paid from the Consolidated Fund of India can require it. This is how Direct Benefit Transfer sends subsidies, scholarships and pensions into Aadhaar-seeded bank accounts. The Aadhaar Enabled Payment System lets a person withdraw cash at a shop by fingerprint instead of using a card.

The privacy limits set by the Supreme Court

In September 2018 the Supreme Court upheld the Aadhaar scheme as constitutional for government subsidies, but struck down Section 57, which had allowed private companies to demand Aadhaar. Banks and telecom operators therefore cannot insist on it as the only option for KYC, and other approved documents must be accepted.

The Court also held that children cannot be denied school admission or benefits under the Right to Education for want of an Aadhaar number. UIDAI's rules allow a Virtual ID, a 16-digit substitute you can generate and give to a service provider instead of your real number, and an offline paperless e-KYC file for cases where sharing the full data is excessive.

A practical rule that follows from the ruling: if a private business asks for a photocopy of your Aadhaar, ask whether another document will do, and offer a masked copy if they insist. Giving your Aadhaar for a government benefit that is funded from the Consolidated Fund of India is a different case, because the Act allows the government to require it there.

Fees, updates and checking your own record

Enrolment for a first Aadhaar is free. Updates at an Aadhaar centre carry a fee, and a PVC card reprint costs ₹50 through the UIDAI portal. Demographic changes such as address or date of birth can be made online, or at a centre when biometrics are involved. Fee and free-update schedules change, so read them on the UIDAI website before you pay anyone.

It is worth auditing your own record. The myAadhaar portal lets you check your authentication history, download a masked copy of the card, lock your biometrics so they cannot be used until you unlock them, and generate the Virtual ID. UIDAI advises using the masked Aadhaar, which shows only the last four digits, for copies you hand over.

UIDAI is the body behind Aadhaar, and the law around it is narrower than most people assume. Use the Virtual ID, lock your biometrics when you are not using them and keep shared copies masked. Those three steps make the number safer to carry.

UIDAI Full Form: Common Questions