Your National Insurance number can normally be found on a letter from the Department for Work and Pensions (DWP) or on your bank statement if your pension is paid into your bank account.
Your National Insurance number is 9 digits long and starts with two letters, followed by six numbers and one letter e.g. AB123456C. If you have lost it www.gov.uk/lost-national-insurance-number may help you find it.
Find out how to apply for a free over 75 TV Licence
For more information on the free over 75 licence see Aged 74 and over.