The National Identification Number (NIN) is a set of numbers assigned to an individual upon successful enrolment. Enrolment consists of the recording of an individual’s demographic data and capture of the ten (10) fingerprints, head-to-shoulder facial picture and digital signature, which are all used to cross-check existing data in the National Identity Database to confirm that there is no previous entry of the same data. Once this (de-duplication) process is completed the data is then stored with a unique NIN that was assigned to it.
The NIN once issued to a person cannot be used again, (that is, it cannot be issued to another person even if the previous person is dead). It is the NIN that helps to tie all records about a person in the database and is used to check the identity verified.

Every citizen from the age of 16 years and above and legal residents are eligible to enrol for the NIN. (Arrangements are currently being made to ensure that all persons from birth can be registered and enrolment of biometrics from the age of five (5) can be achieved).The process is the same whether you choose the self-service or you require an assisted service.

There are different ways you can enrol for the NIN:

Self Service Enrolment
Stage 1

Applicant visits NIMC website: http://www.nimc.gov.ng to access the Enrolment Form or walks into an enrolment centre and use the self-service workstation.
Fills the Enrolment Form online and prints a summary sheet with a 2D Barcode and Registration ID number.
At the enrolment centre, the enrolment officer scans barcode to pull up the applicant data or uses the Registration ID Number to pull up the information from the database.

Alternatively,

Applicant walks into an enrolment centre and picks up an enrolment form.
Fills the enrolment form, providing the required demographic information.
Applicant approaches the enrolment officer who collects the completed form and inputs the details into the enrolment portal.

Stage 2: Applicant verifies and confirms the enrolment data on the system.
Stage 3: Applicant has his photograph, finger print captured.
Stage 4: Applicant has his supporting documents scanned.
Stage 5: Enrolment is acknowledged and a slip is generated and given indicating completion of enrolment.
Stage 6: Applicant leaves the enrolment centre.

b) Assisted-Service
Stage 1: Applicant walks into enrolment centre and request for enrolment assistance.
Stage 2: A support officer assists applicant in picking and filling the enrolment form.
Stage 3. Applicant approaches an enrolment officer who collects the completed form and inputs the details into the enrolment portal.
Stage 4: Applicant verifies and confirms the enrolment data on the system.
Stage 5: Applicant has his photograph, finger print captured.
Stage 6: Applicant has his supporting documents scanned.
Stage 7: Enrolment is acknowledged and a slip is generated and given indicating completion of enrolment.
Stage 8: Applicant leaves the enrolment centre.

c) Mobile-Service
Stage 1: Applicant goes to a mobile enrolment station.
Stage 2: Request an enrolment form and fill it or request a support officer to provide assistance.
Stage 3. Applicant approaches an enrolment officer who collects the completed form and inputs the details into the enrolment portal.
Stage 4: Applicant verifies and confirms the enrolment data on the system.
Stage 5: Applicant has his photograph, finger print captured.
Stage 6: Applicant has his supporting documents scanned.
Stage 7: Enrolment is acknowledged and a slip is generated and given indicating completion of enrolment.
Stage 8: Applicant leaves the enrolment centre.



COLLECTION OF NIN
At the completion of the enrolment process, you will be informed of the date and time for collection of the National Identification Number (NIN).
You can only collect your NIN at the enrolment centre where you enrolled.
NIN can only be collected by an individual after biometric verification and not by proxy.

SUPPORTING DOCUMENTS
PROOF OF IDENTITY

Proof of Identity document must contain name and photo of the resident. Any of the following POI documents are supported.

Passport
Voter ID
Driving License
Government Photo ID Cards
Photo ID issued by Recognised Educational Institution
Photo Bank ATM Card
Photo Credit Card
Photo Credit Card
Pensioner Photo Card

PROOF ADDRESS (POA) DOCUMENTS

Proof of Address documents must contain name ann address of the resident. Any of the following POA documents are supported.

Passport
Bank Statement/Passbook
Post Office Account Statement/Passbook
Voter ID
Driving License
Government Photo ID Cards
Electricity Bill (not older than 3 months)
Water Bill (not older than 3 months)
Telephone Landline Bill (not older than 3 months)
Property Tax Receipt (not older than 3 months)
Credit Card Statement (not older than 3 months)
Insurance Policy
Signed letter having photo issued by Recognised Educational Institution
Pensioner Card
Authority (for rural areas)
Income Tax Assessement Order
Vehicle Registration Certificate.
Registered Sale/Lease/Rent Agreement

PROOF OF DATE of BIRTH (DoB) DOCUMENTS

Prof of DoB document must contain Name and DoB of the resident. Any of the following documents aresupported.

Birth Certificate
Passport
Certificate

Source: http://www.nimc.gov.ng