Hello, Greetings of the day!!
Railway Recruitment Boards have decided that in all future railway recruitments, the applicants shall be required to furnish his /her 12 digit Aadhaar number or 28 digit Aadhaar registration receipt at the time of filling up the application.
During the exam, through a biometric attendance system, their fingerprints can be collected and matched with the one stored with the Aadhaar server.