ESTA with a second citizenship: do you have to declare it?

Since 27 June 2024, Germans no longer lose their citizenship when they apply for and acquire another one. The old loss provision in section 25 of the Nationality Act (Staatsangehörigkeitsgesetz, StAG) has been repealed, and the German Federal Foreign Office expressly confirms the new legal position. As a result, more and more Germans sit down to the ESTA form holding two passports. What dual citizenship means for Germans overall is covered in Dual citizenship for Germans. Before every trip to the US, though, the same question comes up: what do you enter on your ESTA?

Do you have to declare your second citizenship on your ESTA?

Yes, no ifs or buts. In April 2015, US Customs and Border Protection (CBP) published in the Federal Register which data the ESTA application collects. The field "Other Country of Citizenship" is listed there as mandatory. The Department of Homeland Security justified the new fields with the security vetting of travellers in the Visa Waiver Program.

Mandatory means you answer the question, and you answer it truthfully. It makes no difference how you acquired your second citizenship. Whether by birth in a country that grants citizenship by place of birth, through a parent, by naturalisation after years abroad or through an investment in the Caribbean: what counts for the US is that you are a citizen of that country today. CBP also stresses that it assesses citizenship under US law and US practice, not solely on what the other country's law says.

Many people hesitate at this point because they fear a second passport might arouse suspicion. There is no need to worry. US law excludes dual nationals from ESTA only in a few cases, precisely defined in the statute, and the citizenship by investment countries are not among them.

Mandatory field and optional field

CBP's notice draws a clear line between two pieces of information:

You have to name the country, but not the number of your second passport. If you do enter it, copy it exactly as it appears in the passport. A transposed digit does you more harm than an empty optional field ever could.

Which ESTA questions concern your citizenship

The application asks about your citizenship in several places. It helps to keep them all in view together.

• The passport you apply with. You apply for your ESTA with a passport from one of the 42 countries in the Visa Waiver Program. For Germans, that is the German passport. According to CBP, it must be an electronic passport with a chip.
• The questions about other citizenships. According to CBP, the application asks whether you are currently a citizen of another country, whether you have ever been one and whether another country has ever issued you a passport. You enter every other country you are a citizen of. This information is mandatory.
• The eligibility questions. At the end of the application come the yes or no questions. One of them concerns stays in certain countries since 1 March 2011. It is linked to the exclusion of certain dual nationals from the programme.

The idea behind it matters: according to the Department of Homeland Security, the information in the application serves the security vetting of every traveller. If you answer the question in full, you give the vetting exactly what it asks for, and you have nothing left to explain afterwards.

Which passport do you use for your ESTA application?

The passport that makes you eligible for the Visa Waiver Program. According to the US Department of Homeland Security, 42 countries take part, including Germany, Austria and Switzerland. Their citizens can enter for business and holidays for up to 90 days without a visa, as long as they hold an ESTA authorisation beforehand.

None of the citizenship by investment countries is on that list. So you cannot apply for an ESTA with a passport from St Kitts and Nevis, Grenada, Dominica, Türkiye or Vanuatu. For the US, your German passport is and remains your travel document of choice. Your second passport complements it; it does not replace it. Which passport opens the better doors where is shown in the comparison USA, UK, Canada, China: which second passport travels visa-free where.

That gives you a simple rule for the trip itself: your ESTA is tied to the passport you applied with. That is the passport you show at check-in and at the US border. How to line up booking, check-in and border control neatly with two passports is explained in Travelling with several passports.

Special case: you are a US citizen yourself

If you hold US citizenship as well as German citizenship, ESTA is not an option for you. Under 8 U.S.C. 1185(b), US citizens may only leave and enter the United States on a valid US passport. What else applies to German and American dual nationals is explained in German and American dual citizenship.

What happens if you keep your second citizenship quiet?

Some people toy with the idea of simply leaving their second citizenship off the ESTA. The honest answer: don't. A concealed citizenship is not a clever trick; it is the biggest risk you can take with your trips to the US. Three rules of US law work together here.

First: misrepresentation makes you inadmissible. Under 8 U.S.C. 1182(a)(6)(C)(i), anyone who by fraud or by knowingly misrepresenting a material fact seeks or has obtained a visa, other documentation or admission into the US is inadmissible. A citizenship that the form expressly asks about is exactly such a fact.

Second: an ESTA can be revoked at any time. Under 8 U.S.C. 1187(h)(3)(C)(i), the Secretary of Homeland Security can revoke or shorten an ESTA authorisation at any time and for any reason. An authorisation already granted therefore does not protect you if it later turns out that something you entered was wrong.

Third: no legal recourse. Anyone entering under the Visa Waiver Program waives, under 8 U.S.C. 1187(b), the right to contest the border officer's decision on admission. The German Federal Foreign Office puts it plainly: there is no appeal against the officer's decision, and German embassies and consulates cannot reverse a refusal of entry. According to its travel advice, false statements, for instance about the purpose of your trip, can lead to arrest and deportation.

Now set that against the alternative: you enter your second citizenship, get your ESTA as before and travel in. What can still go wrong at the border despite an ESTA is covered in Denied entry to the USA despite ESTA.

Acquired a second citizenship after your ESTA: apply again?

A common situation: your ESTA is still valid, but you have since acquired a second passport. Do you need a new ESTA even though the old one is still running? The answer is in 8 CFR 217.5(e), where the US regulation lists when a new authorisation is required:

You answer the question whether you are currently a citizen of another country with yes or no. If you took on another citizenship after your ESTA was approved, the circumstances behind your earlier answer have changed, and that answer is no longer correct. So before your next trip, file a new application that includes your second citizenship. That brings your details up to date again, and you travel with a clear conscience. Under the same provision, an ESTA authorisation is generally valid for two years, and at most until your passport expires. How to fill in the application step by step is described in ESTA application for the USA: travel to America without a visa.

Which dual nationals are barred from ESTA

The law has a short list of nationalities that actually block an ESTA. It is based on the Visa Waiver Program Improvement and Terrorist Travel Prevention Act of 2015, incorporated into 8 U.S.C. 1187(a)(12). CBP names the countries concerned:

For presence in those countries there are exceptions, for example for members of the armed forces of a participating country and for full-time government employees on duty. For dual nationality, these exceptions expressly do not apply. The German Federal Foreign Office sums it up for Germans: anyone who also holds the nationality of Iran, Iraq, North Korea, Syria or Sudan is in principle excluded from the programme, and the same applies to German and Cuban dual nationals.

Excluded does not mean locked out. These travellers apply for a visa at a US embassy or consulate. And this is exactly where the good news lies if you are considering another citizenship: none of the programme countries, from St Kitts and Nevis to Cambodia, is on this list. A passport from St Kitts and Nevis, Grenada, St Lucia, Vanuatu, Türkiye or Jordan has nothing to do with the ESTA exclusion. You declare it and keep travelling on your German passport as before.

Does the US travel ban apply to Germans with a second passport?

Since 1 January 2026, the US President's Proclamation 10998 has restricted entry for nationals of a number of countries. Among the programme countries it names, for example, Antigua and Barbuda and Dominica, for which B-1 and B-2 visitor visas, among others, are suspended. Many holders of a Caribbean passport have wondered whether their Plan B has lost value as a result.

The proclamation answers the question itself. Section 6(b)(ii) exempts any dual national of a listed country who travels on the passport of a country that is not listed. If you travel on your German passport with your ESTA, the restrictions on your second nationality do not apply. You still declare your second citizenship on the ESTA application, just like any other.

For a passport from Antigua and Barbuda or Dominica, that means its strengths lie where your German passport does not reach: as a second citizenship, a second travel document and a safety net. For the US, your German passport remains the one to use. Which programmes give you which advantages is shown in the programme comparison.

Why a second passport does not put your US trips at risk

An ESTA is a permission. US law says so without hedging: the authorisation is not a decision on admission, it can be revoked at any time, and the officer at the border decides on entry. That is how travel authorisations and visas work all over the world. A state grants them, and it can take them away again.

Citizenship is something fundamentally different. It is a right. You may enter the country you are a citizen of, you may live there, and it issues you a passport. That is exactly what makes a second passport so valuable: it does not depend on the goodwill of an authority that approves or rejects your application. How this affects the overall travel freedom of your passports is shown in the passport ranking.

For the US, the picture is therefore clear:

1. Your German passport remains your key to ESTA and the Visa Waiver Program.
2. Your second passport is declared truthfully on the ESTA application and does not change your eligibility, as long as it does not come from one of the six excluded countries named above.
3. Both passports together give you more room to move than one alone: a second citizenship, a second travel document, a second embassy you can turn to.

That you may keep your German passport has been settled since 2024. How the German passport and a passport from an investment programme work together is explained in CBI passport and German passport. How long the road to a second passport takes and what steps it involves is set out under How it works.

ESTA denied: what then?

If your ESTA is denied, your trip is not lost. Under 8 CFR 217.5(f)(2), a denial under the Visa Waiver Program does not mean you cannot get a visa. You apply at a US consulate. That also applies to dual nationals with one of the excluded nationalities, who may not travel on an ESTA in the first place.

CBP points to a practical route for urgent cases: if your ESTA was denied or revoked and you have urgent business, medical or humanitarian travel coming up, you can request an expedited visa appointment. Keep a copy of the denial for this. Under the regulation, there is no judicial review of the ESTA decision itself, which is why the visa application is the right way forward.

Which visa suits which purpose of travel, such as the B-1 for business trips, is explained in ESTA or B1 visa for the USA. For the vast majority of Germans with a second passport, though, the question never arises. They enter their second citizenship, get their ESTA and travel as usual.

The rules at a glance

Honest on the form, strong in your passport: that is how a second passport fits into your life without so much as touching your trips to the US.

Frequently asked questions