The Aadhaar card is a government document for which a resident Indian can apply and obtain at any of the Aadhaar Enrollment Centres. It is a 12 digit identification number issued to an individual after receiving demographic information such as name, date of birth, residential address, biometric information such as fingerprints, iris scan and so on. It consists of random numbers that have no relationship to any personal details of the individual.
Earlier, the UIDAI used to follow the rules as per the Aadhaar Act of 2016 which mentioned that aadhaar can be issued only to the resident Indians. As per the act, the resident refers to an individual who has been residing in India for a period of equal to or more than 180 days in the 12 months immediately before applying for the Aadhaar number.
But the 2019 Union Budget proposed to issue Aadhaar Card to NRIs on arrival, who hold Indian passports without waiting for the mandatory 180 days.
The Aadhaar Card is linked with the centralized databases and mainly contains the demographic and biometric details of an individual which plays a key role in identifying the individual.
The NRI(Non-Resident Indian) can visit UIDAI official website or UIDAI nearby enrollment centre to apply for an Aadhaar card.
They can apply for Aadhaar by providing necessary documents such as Proof of Identity(POI) and other necessary documents. The applicant is required to provide their biometric information in the process of Aadhaar Enrollment. Below are the steps to be followed by Non-Resident Indians (NRI) to avail an Aadhaar card by visiting the Aadhaar enrollment centre:
Step 1: Submission of Documents
The first step is to provide important documents to Aadhaar Executives to establish the identity of the non-resident Indian. That is the NRI should submit necessary documents such Proof of Identity (POI), Proof of Relationship (POR) with another country, Resident proof, Birth certificate and PAN card. Then after the Aadhaar Executives or government officials will verify the submitted documents and will determine the validity and eligibility for NRI applicant for an Aadhaar Card.

Step 2: Finger – Tip Scanning
After submission of necessary documents by NRI. The second step includes the biometric scanning of all ten fingers. The individual is required to place his/her fingers to enable capture on the platen. This process will be done for establishing the unique identity of an applicant. This biometric scan will be stored in the government database.

Step 3: Iris Scanning
Next step will be to scan the Iris of an applicant by the operator.
The applicant will be asked to sit in a fixed position and then the iris recognition software will scan his/her iris for the process of recognition of the applicant. Then the image captured by the iris recognition software will help to ensure that there is no confusion of an individual’s identity with another person.

Step 4: Photograph
After the process of Scanning Iris and Fingerprints in done. The next process is to capture NRI' s passport size photograph on the web camera. The photo taken on the web camera will be attached to the Aadhaar documents and the same picture will be printed on the card as well.

Lastly, The Government Aadhaar official will hand over the acknowledgement slip which contains Enrollment ID which can be used to track the status of the applicant's application. It usually takes around 60 – 90 days for the authorities to dispatch the Aadhaar Card to the individuals.
NRI need to carry necessary documents when they are applying for Aadhaar card in Aadhaar enrollment centres. Below are some important documents that they need to carry at the time of Aadhaar enrollment process in Aadhaar Enrollment centre:
1. An identity which establishes Non – Resident Indian Status:
2. Proof of Address(POA): It contains documents such as Voter ID or Passport or Ration Card or Driving License or Government/PSU photo ID or Gas Connection Bill or Electricity Bill or Water Bill or Landline Bill or Bank Passport or Credit Card Statement etc.
3. Proof of Identity(POI): It consists of documents such as PAN Card or Ration Card or Passport or Voter ID or Driving License or Government/PSU Photo ID etc.
4. Proof Date of Birth: It consists of documents such as Birth Certificate or PAN Card or Government/PSU Photo ID, SSLC marks Card or 10th Marks Sheet.
As per the Section 139AA of the Income Tax Act of 1961, which was introduced by the Finance Act 2017, it is a must to quote Aadhaar number or Aadhaar Enrollment ID to file Income Tax returns and for submitting an application form for PAN with effect from July 1, 2017.
It is essential to quote the Aadhaar number or Enrollment ID which is applicable for those individuals who are eligible to secure an Aadhaar number. As per the Aadhaar act of 2016, only residents are eligible to get an Aadhaar number and accordingly the resident is an individual who resides in India continuously for 182 days or more in the past 12 months immediately before the date of applying for Aadhaar card.
Individuals who are not residents of India for them, Section 139AA of the Income Tax Act of 1961, will not apply as per the Aadhaar Act of 2016.