If you don’t know your National Insurance number, Perth & Kinross says you can still sort it out by using other evidence that shows it. They also point you to the official route to report a lost or forgotten number.
| What you can use | Details |
|---|---|
| Recent payslip | Accepted as evidence of your National Insurance number |
| Recent pension statement | Accepted as evidence of your National Insurance number |
| Letter from the Department for Work and Pensions | Accepted as evidence of your National Insurance number |
| P45, P60, or other HM Revenue and Customs document | Accepted if it shows your National Insurance number |
| Official lost/forgotten number service | Report a lost or forgotten National Insurance number |
If you’re applying for Housing Benefit or Council Tax Reduction, the council says they need original documents, not copies. For Universal Credit, your National Insurance number is one of the details you’ll need to have ready when you make your claim.