This guidance tells HM Passport Office staff about the laws on legitimacy and advises how to confirm a customer, born before 1 July 2006, is the legitimate child of their father, for nationality purposes.
It also tells staff how to confirm where the customers father was domiciled, if needed, to establish a claim to British nationality.
Updates to this page
Published 8 April 2022 Last updated 5 February 2025 +show all updates
This guidance has been updated: to better explain how legitimacy works in British nationality for people born before 1 July 2006 and includes examples to show this; to reflect a change of name for the Guidance team; to explain how we send the customer the domicile questionnaire.