Change description : 2026-01-12 15:11:00: Updated to explain how we send the customer the domicile questionnaire, make a minor terminology change in relation to DNA testing for British passport applications and remove references to Application Management System (AMS). [Guidance and regulation]
Tells HM Passport Office staff about legitimacy and domicile for customers born before 1 July 2006, where the claim to British nationality is through a father.
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 customer’s father was domiciled, if needed, to establish a claim to British nationality.
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.