Request a National Insurance number letter

Before you start

Complete this form to:

• get a letter confirming your National Insurance number
• report a change of details

You may need to send up to 2 of the following documents to confirm your identity to HMRC:

• birth certificate
• passport
• full or provisional driving licence (plastic card)
• adoption certificate
• home office or travel document
• work permit
• certificate of naturalisation
• marriage or civil partnership certificate
• certificate of service in Her Majesty's Forces or merchant navy
• identity or medical card

The letter HMRC send you can be used as proof of your National Insurance number.

If you do not have a National Insurance number

Do not complete this form if you've never had a National Insurance number before. Instead you should apply for National Insurance number online.

Eligibility

You must be over the age of 16.

You must already have a National Insurance number even though you may have lost or misplaced it.