Evidence of your NI number
Evidence of your National Insurance number can be any one of the following:
P45 or P60.
Letter from HM Revenue and Customs about tax or tax credit.
Bank statements showing payments by direct debit for class-2 National Insurance contributions, or benefit payments received showing your National Insurance number on the statement, for example, Incapacity Benefit or State Pension.
Payslips, salary statement or works pension statement (as long as it shows your National Insurance number).
Letter that the Pension Service or Jobcentre Plus has sent to you (not handwritten).
National Insurance number card (not handwritten).
Note: This list is not exhaustive.
We need one document to confirm your National Insurance number and one to confirm your partner's National Insurance number, if you have a partner.
To find out more...
For more information about National Insurance, or how to apply for a National Insurance number if you don't already have one, visit GOV.UK - National Insurance.