The following applicants cannot join:
1. Undercharged insolvent: Individuals who are not granted an 'order of discharge' by a court
2. Individuals of unsound mind: An individual is said to be of unsound mind for the purposes of making a contract if, at the time when he makes it, he is incapable of understanding it and of forming a rational judgment regarding its effect upon his/her self-interest
3. Pre-existing account holders under NPS