UK ETA for Dual Citizens: Which Passport Should You Use?

Holding two passports sounds like a travel advantage, and often it is. For a UK trip it can also create a choice that is easy to get wrong. Which passport do you use to apply, which one do you show at check-in, and does the answer change if one of your nationalities happens to be British? This guide works through those questions as the rules stand on 10 October 2026. It is general information, not advice on any individual case.

The short answer

• If you are British or Irish as well as another nationality, current guidance says you cannot get an ETA. You travel by showing your British or Irish status instead, as set out below.
• If you hold two nationalities that can each need an ETA, you choose one passport, apply with it, and travel on that same passport. The ETA is tied to it.
• If one nationality is on the UK visa list, do not assume the other passport removes the visa requirement. The rules are written around nationality, so check before you book.
• Switching passports casually is the mistake to avoid. A passport that was not used for the ETA application does not carry that ETA with it.

Why the passport matters

Whether you need an ETA depends on your nationality, and the ETA itself is built around a particular travel document. The application asks for a national passport that establishes your identity and your nationality, and the rules say the ETA is valid only when the holder travels using the passport named in the application.

For a person with one nationality this is invisible. For a person with two, it means three questions arise, and they are separate:

1. Do I need an ETA at all, given everything I am a citizen of?
2. If I do, which passport should the application use?
3. Will the passport I present at the airport be the one the ETA is attached to?

The rest of this article takes those in turn. If you want the broader picture first, our guide to UK ETA requirements covers who needs an ETA in general.

If you are also a British citizen

British citizens have the right of abode in the UK, so they do not need an ETA or a visa. Current guidance goes a step further for dual nationals: someone with British citizenship as well as another nationality cannot obtain an ETA. The ETA is for people who need permission to enter as a visitor, and a British citizen does not.

The practical consequence is that you cannot solve the problem by applying for an ETA on your other passport. If you are a British citizen, the route is to prove it.

Check whether you are a British citizen at all

Some people hold British citizenship without realising. Guidance notes that a person may be British automatically, for example because they were born in the UK or have a parent who is a British citizen, and that the Home Office does not keep records of everyone who is British automatically. It also says that checking before you travel is your responsibility. If a parent or birthplace might make you British, find out before you pay for an ETA you cannot use.

Ways to show British status

The current guidance for dual citizens lists the documents that let you travel as a British citizen. The main ones are:

• a valid British passport;
• another valid passport together with a certificate of entitlement proving the right of abode; or
• a valid Irish passport, if you hold one.

A certificate of entitlement is the document that records the right of abode when the person travels on a foreign passport. It is now issued as a digital record accessed online rather than as a sticker, and the guidance says a person cannot hold one at the same time as a valid British passport. It is not a visa. Because the rules and procedure around it have been changing, anyone considering one should read the current process before applying, not rely on an older article.

If you hold none of those documents

Guidance describes limited situations in which an airline may still allow a dual citizen to travel, and they are worth knowing about without being relied on:

• An expired UK passport issued in 1989 or later, together with a valid passport for a nationality that can get an ETA, where the personal details on both passports match. This is the airline’s decision, not a right.
• A person who became a British citizen after settling under the EU Settlement Scheme may be able to travel on a valid passport of another nationality, or an identity card from a listed European country, after checking their online immigration record and updating it for any new document.

Neither of these means a dual citizen can obtain an ETA. They are alternative ways of showing status, and a carrier decides whether it will accept them. The tidy long-term answer is a British passport or a certificate of entitlement. See also our comparison of an ETA and a visa for the wider difference between travel permission and immigration status.

If you are also an Irish citizen

Irish citizens do not need an ETA, and the same guidance says an Irish dual citizen cannot get one. The straightforward evidence is a valid Irish passport, which the dual-citizen guidance lists alongside a British passport.

Two cautions. First, being Irish and holding another nationality is different from living in Ireland as a non-Irish national. A person who is not Irish but lives lawfully in the Republic of Ireland and travels to the UK from the Common Travel Area has a separate exemption with its own conditions, and it does not turn that person into an Irish citizen. Second, what you can show at the border and what your airline requires before boarding are separate questions. Border guidance for Irish citizens is relatively flexible about identity documents, but the airline decides whether to let you board and may ask for a passport.

Two ETA-eligible nationalities

Suppose neither of your nationalities is British or Irish, and both are on the list of countries whose citizens use an ETA. You need an ETA for the trip, and you have a genuine choice about which passport carries it. A few practical factors help:

• Passport validity. An ETA lasts two years or until the passport it was linked to expires, whichever comes first. A passport with more time left gives a longer-lasting ETA.
• The passport the airline already has. Booking details and check-in information usually come from one passport. Choose the one you will really present and keep the whole journey consistent.
• Photo and condition. The identity checks rely on the passport page and your photo, so the cleaner, newer document is often the safer base. See the guidance in our requirements checklist.
• Other trips. If you will travel to the UK repeatedly, think about which passport you expect to carry over the next two years, because renewing it can mean needing a new ETA.

None of these is a rule that one passport must be used. They are ways to avoid avoidable mismatches. Whichever you choose, apply with it, check the details carefully, and then travel with it.

One ETA nationality and one visa nationality

This is the least tidy situation, and it deserves caution rather than a confident rule. The ETA rules require a passport that establishes an eligible nationality. The separate rules for the visa list, however, say that a person who meets one or more of the stated criteria needs a visa, and the first criterion is being a national or citizen of a listed country. They are framed around nationality, not around which of your passports you happen to present.

In the primary material reviewed for this article we did not find a plain sentence that settles how a dual national with one visa-list nationality and one ETA nationality is treated for a visitor trip. Do not assume that choosing the “easier” passport solves it, and do not assume the opposite. Settle it with the Home Office or your airline before you book or pay. If a visa does turn out to be the right route, our UK visa overview explains what to look at.

Situations at a glance

How the ETA is tied to a passport

When an ETA is granted, it is recorded against the passport used in the application. You are told to wait for the confirming email before you travel, and you are generally asked only to show that passport. There is no separate paper to carry. The consequence for dual nationals is easy to state: the ETA works with the passport it was granted for, and does not transfer to your other passport, even though both belong to you.

The ETA also stops being useful when that passport expires or is replaced, and an ETA is not simply moved to a new document. Our article on ETA validity and new passport rules sets out that side in detail.

Renewed, lost or replaced passports

Because the ETA is linked to a document, a change of document matters.

• Renewed passport. The ETA was granted for the old passport. A new passport generally means a new ETA if you still need one.
• Lost or stolen passport. A passport that has been reported lost or stolen is not valid for an ETA application, and an application using one is rejected. Use a valid document.
• A passport you stop using. If you move your travel to your other passport, plan a new application for it where you still need an ETA, rather than hoping the first one follows you.
• A found passport. If you reported a passport lost and it turns up, do not assume it is usable again. The reporting authority’s records decide.

Holding two valid passports

Two valid passports give you flexibility in your own life, such as for other countries’ entry rules, but not freedom to switch documents on the same UK journey without consequences. The sensible approach is simple.

• Choose the passport for the UK trip when you book.
• Use the same passport for the ETA application, the airline booking details and check-in.
• Carry the other passport separately if you need it for another country, and do not hand it over by accident.
• If you must change documents mid-journey, because one is lost for example, talk to the airline before you reach the gate and check whether a new ETA is needed.

Airlines are responsible for deciding who they allow to board. A mismatch between booking details, passport and ETA record is exactly the kind of thing that can cause a delay or a refusal to board, and it is far easier to fix at home than at the desk.

Name differences and transliteration

Two passports from two countries do not always spell a name the same way. One may use a middle name that the other omits, one may place a family name differently, and a name written in a non-Latin alphabet may be transliterated differently by each country.

The safest approach is to enter the details exactly as they appear on the passport you are applying with, and to give the airline the details from that same passport. Do not blend the two versions or “correct” one to match the other. If an application is rejected because the identity could not be confirmed, a mismatch like this can be the cause. Where the difference is large enough that an airline may question it, ask the airline what it needs before travelling. This is general practical guidance, not a rule about how a particular difference will be treated.

Families and children

Every traveller needs their own ETA where one is required, including babies and children, and nobody’s approval covers anyone else. Families with mixed nationalities therefore need to sort each person separately, and the results can differ within one household.

A child can be a dual citizen too. A child who is also British cannot obtain an ETA, so the family’s evidence of that child’s status matters as much as the adults’. A child with two ETA nationalities needs one ETA on one passport, which then becomes the child’s travel document for the trip. Our guide to ETAs for children, babies and families covers the application side in more detail.

Example scenarios

The following are hypothetical examples, written to illustrate how the rules operate. They are not real cases and not predictions of any outcome.

A. British and another ETA-eligible nationality

A traveller was born in the UK and later moved abroad, where they took a second nationality. They hold only the second country’s passport. They cannot solve this by applying for an ETA. The route is to prove British status, for example by renewing a British passport or getting a certificate of entitlement for the foreign passport, and to start well ahead of the trip.

B. Irish and another ETA-eligible nationality

A traveller is a citizen of Ireland and of another country. Their Irish passport is valid. They do not apply for an ETA and show the Irish passport when travelling, keeping the other passport for other purposes.

C. Two ETA-eligible nationalities

A traveller holds two passports, one expiring in four months and one in four years. They apply for the ETA on the later-expiring passport, use it at booking and check-in, and keep the nearer-expiry passport out of the UK journey so the two never get mixed up.

D. ETA nationality plus a nationality on the visa list

A traveller holds a passport from a country that normally uses an ETA and another from a country on the visa list. They do not simply apply for an ETA and book. They first ask the Home Office or their airline how their nationalities are treated for a visit, and decide on an ETA or a visa on that basis.

E. The passport used for the ETA is renewed

A traveller obtained an ETA a year ago, then renewed that passport. The new passport has a new number. They treat the old ETA as no longer attached to their current document and check whether a new ETA is needed before their next flight.

F. A mixed family

Two parents and two children travel together. One parent is British and Canadian, the other is Canadian only, one child is British and Canadian, and the youngest is Canadian only. The Canadian-only family members each need an ETA. The British-and-Canadian parent and child cannot get one and must show British status, so the family checks all four people’s documents separately well before booking.

Common mistakes

• Applying for an ETA as a British or Irish dual citizen. It is not available, so the effort is wasted.
• Applying on one passport and travelling on the other. The ETA does not follow you.
• Assuming the ETA passport avoids a visa. Nationality rules are not always passport-by-passport.
• Giving the airline details from one passport and presenting the other. Mismatched details cause delays.
• Not checking whether you are British automatically. A British parent or UK birth can matter.
• Leaving a certificate of entitlement or passport renewal to the last minute. These are not same-day services.
• Treating relatives’ ETAs as interchangeable. Each person needs their own.
• Ignoring a rejection or refusal. If the application is not successful, see why an ETA may be refused or rejected before you reapply.

Pre-travel checklist

1. List every nationality you hold, including ones you rarely use.
2. Check whether you may already be British, through birth in the UK or a British parent.
3. If British or Irish, decide how you will show it: a valid passport or a certificate of entitlement.
4. If you need an ETA, choose the one passport you will use and check its expiry date.
5. If a visa-list nationality is involved, resolve the question before booking.
6. Enter details exactly as shown in the chosen passport.
7. Wait for the ETA confirmation before travelling.
8. Use the same passport for the ETA, the booking and check-in.
9. Check every family member separately.
10. Keep the unused passport separate from the one you will present.

Frequently asked questions

Do dual citizens need a UK ETA?

It depends on the nationalities. British and Irish dual citizens cannot get an ETA and travel by showing their British or Irish status. A dual national of two other countries needs an ETA if their passport nationality requires one.

Which passport should a dual citizen use for a UK ETA?

Use the passport you will actually travel on, and apply with that one. The ETA is linked to it, so choosing a passport with good validity helps.

Can I use my British passport if I am also a citizen of another country?

Yes. A valid British passport is one of the documents the dual-citizen guidance lists. You do not need an ETA when you travel on it.

I have a foreign passport only but I am British. What do I do?

You can show a certificate of entitlement with the foreign passport, or obtain a British passport. Either takes time, so plan ahead, and do not rely on an ETA.

Can an Irish dual citizen apply for an ETA?

No. Irish citizens do not need one, and guidance says an Irish dual citizen cannot get one. A valid Irish passport is the usual evidence.

Must the passport I show at the airport be the same one used for the ETA?

For an ETA to be valid, the holder must travel using the passport specified in the application. Present that passport.

Can I switch passports between my outbound and return journeys?

An ETA matters for travel to the UK, not leaving it. Even so, changing passports within a trip can cause mismatches in airline records, so keep your documents consistent and check with the airline if you must change.

What if I renew my passport after getting an ETA?

The ETA was granted for the old passport. A new passport generally means a new ETA if one is still required.

What if the two passports show my name differently?

Apply and book using the details exactly as they appear on the passport you will present. Do not mix versions, and ask the airline if the difference is significant.

Does a dual citizen of an ETA country and a visa-list country need a visa?

The rules reviewed do not spell this out in a single sentence, and the visa list is framed by nationality. Confirm with the Home Office or the airline before booking.

Do my children need ETAs if they hold two passports?

Each child needs their own ETA where one is required, on one passport. A child who is also British cannot get an ETA and must show British status instead.

Does an ETA guarantee entry to the UK?

No. An ETA is permission to travel. A Border Force officer decides on permission to enter, and British citizens are treated differently because they have a right of abode.