UK Citizenship — Resumption (Section 13)

Summary

Section 13 of the British Nationality Act 1981 lets a person who previously renounced British citizenship be registered as a British citizen again. It exists because some countries (historically, India, Japan, China, Singapore, and others) did not permit dual citizenship, forcing people to give up their British nationality as a condition of acquiring or keeping another.

There are two sub-routes:

• Section 13(1) — an entitlement if the renunciation was necessary to retain or acquire another nationality and the applicant has not previously been resumed under this section. The Home Office must register you if the conditions are met.
• Section 13(3) — a discretionary route used when the entitlement conditions don't apply — typically for applicants who have already resumed once before and now want to resume a second time, or whose renunciation was not strictly nationality-driven.

Eligibility

You may be eligible under Section 13(1) if all of the following are true:

• You were previously a British citizen.
• You formally renounced your British citizenship by lodging a Home Office declaration of renunciation (typically Form RN) that was registered by the Secretary of State.
• The renunciation was necessary to acquire or retain another nationality that did not permit dual citizenship.
• You have not previously resumed British citizenship under Section 13(1).
• You meet the good character requirement.

Section 13(3) may apply if:

• You were British and renounced, but either the renunciation wasn't nationality-driven, or you have already used the 13(1) entitlement once. The decision is discretionary — the Secretary of State may grant it where there is a good reason.

Common qualifying patterns

• A former British citizen who acquired Japanese, Indian, or Chinese citizenship before those countries relaxed their rules and had to renounce British nationality to do so.
• A former British citizen who renounced in order to take up citizenship of a country with constitutional single-nationality requirements and now wants to resume British citizenship after emigrating elsewhere.
• A second-time resumption after a previous Section 13(1) registration has already been used — this falls under the discretionary Section 13(3).

What does not count

• Simply not using a British passport does not renounce citizenship.
• Acquiring another citizenship that permits dual nationality (for example, U.S., Canadian, Australian, Irish, or most EU citizenships since the 1967 cases) does not trigger renunciation under UK law.
• Loss of citizenship by deprivation (where the Home Secretary stripped it) is a different situation — Section 13 does not apply.

What This Route Allows

This route can help confirm or document citizenship in the United Kingdom when the citizenship-creating facts named above are proven. For many people in this category, the main work is evidence: civil records, family-link records, prior citizenship records, and any registration or restoration paperwork needed to show the claim.

What This Route Is Not

This is not a shortcut around documentation. Even when the citizenship claim is based on a right, you still need records that prove each required fact and family link.

Next Steps

1. Find your renunciation declaration. The Home Office issued a registered declaration (Form RN) when the renunciation took effect. Contact the Home Office Nationality Enquiries team if you don't have a copy.
2. Gather evidence of the other nationality. The citizenship certificate, naturalization certificate, or passport showing the nationality that required the renunciation, plus evidence from that country showing dual nationality was not permitted at the time.
3. Decide which sub-route applies. If this is your first resumption and the renunciation was nationality-driven, apply under Section 13(1). Otherwise apply under Section 13(3) with a supporting narrative.
4. Complete Form RS1. This is the Home Office's application form for resumption of British citizenship. The current adult registration fee is £1,670.
5. Provide identity documents and photos — two identity documents and two passport-style photos.
6. Attend a citizenship ceremony. Resumed citizens take the Oath of Allegiance and receive a new certificate.
7. Apply for a British passport with the certificate.

Decision timing varies by case and Home Office workload; 13(3) discretionary cases can require more review.

Sources

• British Nationality Act 1981, Section 13 — the primary statute.
• British Nationality Act 1981, Section 12 — the renunciation provision that Section 13 reverses.
• Home Office — Resumption of British citizenship: caseworker guidance — official policy guidance.
• Form RS1 (Apply to resume your British citizenship) — application portal.
• Home Office — Good character requirement — nationality policy guidance.
• Home Office — Citizenship fees — current nationality application fees.