US Embassy Warns Dual Citizens Against Travelling on Foreign Passports: What You Need to Know

The United States Mission in Nigeria issued a sharp and unambiguous advisory on Sunday, July 26, 2026 — one that carries real, immediate consequences for the tens of thousands of Nigerian-Americans who hold dual citizenship and live, work, or travel between the two countries. The message, published on the Mission's official X account, was clear: if you are a US citizen, you are legally required to enter and depart the United States on a valid American passport. Using your Nigerian passport, or any other foreign passport, is not an option, not a shortcut, and not something the Department of Homeland Security will overlook.

For dual nationals who have grown comfortable navigating both identities depending on which passport serves them better in any given moment, the advisory is a reminder that at the US border, American law recognises only one of those identities.

What the Advisory Actually Says

"U.S. citizens are REQUIRED to enter and depart the United States on a U.S. passport. This requirement applies equally to U.S. citizens, including children, who are dual nationals," the Mission stated.

The language — capitalised "REQUIRED" — is deliberate. This is not guidance or a recommendation. It is a restatement of federal law, issued with evident urgency at the height of the summer travel season, directly to an audience the Mission has identified as needing the reminder.

The Mission specifically warned that dual-national U.S. citizens are not permitted to use their foreign passports to apply for an Electronic System for Travel Authorization (ESTA), and that the U.S. Department of Homeland Security routinely denies or cancels ESTA applications submitted by dual-national U.S. citizens using foreign passports.

That enforcement detail matters enormously. ESTA is the automated pre-travel authorisation used by nationals of Visa Waiver Program countries to travel to the United States without a visa. Nigeria is not a Visa Waiver Program country, but the warning applies across the board: any US citizen — regardless of which second passport they hold — who attempts to enter the US using a foreign passport and applies for ESTA as though they were a foreign national is attempting to circumvent an immigration requirement that DHS is actively monitoring and consistently acting on.

The Mission also reminded travellers that failure to comply could disrupt their travel plans — a diplomatic understatement for what can, in practice, involve being detained at the port of entry, denied boarding at a foreign airport, or having an ESTA cancelled before departure, stranding a traveller abroad with no valid travel document for re-entry to the United States.

The ESTA Problem: Why Dual Nationals Get Caught

Understanding why this warning exists requires understanding how ESTA works and why it creates a trap for dual nationals who do not know the rules or who underestimate how thoroughly DHS tracks these applications.

The ESTA is intended for eligible foreign travelers under the Visa Waiver Program, not for United States citizens. According to the notice, the Department of Homeland Security routinely denies or cancels ESTA applications when it determines they belong to American citizens with dual nationality.

The logic of the trap is this: a dual national holding, say, a British passport alongside their American one might assume they can use their British ESTA to board a flight to the US, avoid the queue at the American passport desk, and simplify their entry experience. What they are actually doing is misrepresenting themselves as a foreign national to an automated system that cross-references databases and will flag the application when it identifies an American citizenship record attached to the same person. The ESTA gets cancelled. The boarding pass may be voided. The traveller is left to scramble.

The warning, issued during the summer travel season, aims to prevent individuals with dual nationality from attempting to travel to the United States using only the passport issued by their other country. The timing is not incidental. Summer is when travel errors cluster — when plans are made quickly, when documents are checked last, and when the consequences of a failed boarding or a cancelled authorisation are most disruptive.

The Passport Validity Warning: A Separate but Related Risk

Beyond the ESTA issue, the Mission layered in a second, equally practical warning that catches a different category of dual national: those whose American passport has expired or is close to expiring, and who assume their foreign passport will carry them through.

The Mission urged affected travellers to renew expiring passports early and ensure they comply fully with U.S. entry and exit regulations before making travel arrangements.

"If you are a U.S. citizen or national and live abroad and plan to travel to the United States, make sure you do so with a valid U.S. passport. If your U.S. passport is expired or expires soon, renew before your trip!" the Mission advised.

This is a real and recurring problem among Nigerian-Americans who live primarily in Nigeria. American passports require renewal every ten years for adults and every five years for children under 16. Dual nationals who have lived outside the United States for extended periods sometimes allow their American passports to lapse, either through oversight or on the mistaken assumption that their foreign passport is a functional substitute. It is not — not for crossing the US border. Renewing an American passport from abroad requires scheduling an appointment at the US Embassy or one of the consulates, submitting the required documentation, and allowing sufficient processing time. None of that can be done at the airport on the day of travel.

The Mission further reminded travellers that many countries require passports to have at least six months of validity before entry is permitted — "Remember many countries require passports have six months validity" — adding another layer of urgency to ensuring all travel documents are current before departure.

The Broader Context: A US-Nigeria Relationship Under Strain

The advisory does not exist in a vacuum. It lands at a moment of significant tension in the US-Nigeria travel and immigration relationship, and understanding that context helps explain why the Mission felt the need to issue such an explicit public reminder.

Since January 1, 2026, the United States has partially suspended the issuance of B-1/B-2 visitor visas, F, M, and J student and exchange visitor visas, and most immigrant visas to Nigerian nationals under Presidential Proclamation 10998 on "Restricting and Limiting the Entry of Foreign Nationals to Protect the Security of the United States." The partial suspension applies to Nigerian nationals alongside nationals of 18 other countries including Angola, Benin, Ghana, Senegal, Tanzania, Cuba, and Venezuela.

The U.S. Mission said the reduction of visa validity periods for most Nigerian nonimmigrant applicants was part of a broader technical and security-based review, and stressed that the policy was not specifically directed at Nigeria's position on third-country deportees, e-visa policies or affiliations with groups such as BRICS. That clarification was itself issued in response to widespread speculation that the visa squeeze was retaliatory — a signal of how fraught the bilateral relationship has become in the travel and immigration domain.

As of February 10, 2026, DHS had added 18 more Nigerians to its "worst-of-the-worst" criminal register for removal, bringing the total number of Nigerians marked for deportation in the current enforcement drive to 97, with convictions primarily for wire fraud, mail fraud, and identity theft. The enforcement climate around Nigerian travel to the United States is, by any measure, more intensive than it has been in years.

Into that context, the dual passport advisory reads not merely as a procedural reminder but as a signal about the environment dual nationals are travelling into. At a moment when DHS is scrutinising Nigerian travel documents more closely than ever, attempting to enter the United States on a foreign passport while holding American citizenship is precisely the kind of irregularity that will attract exactly the kind of attention that no traveller wants at the border.

What Dual Nationals Must Do

The practical checklist emerging from the advisory is straightforward but non-negotiable.

Every US citizen — regardless of what other passport they hold — must present a valid American passport when boarding a flight to the United States and when crossing its borders by any means. Valid means not expired, not expiring within days, and not expected to be accepted on the basis of an exception that does not exist in law.

Dual nationals must never apply for ESTA using a foreign passport. ESTA is for foreign nationals. A US citizen applying for ESTA is misrepresenting their status to an automated system that DHS actively monitors. The application will be denied or cancelled, and the denial creates a record.

Dual nationals with children who hold both nationalities are explicitly covered by this requirement. A child born in the United States to Nigerian parents, or a child born to a US citizen parent anywhere in the world, who also holds Nigerian citizenship, must travel to the US on their American passport. The child's Nigerian passport does not satisfy the entry requirement.

Passports approaching expiry should be renewed before travel is booked, not after. American passport renewal from Nigeria is processed through the US Embassy in Abuja or the Consulates in Lagos. Processing times fluctuate. Waiting until two weeks before a planned trip is a risk not worth taking in the current environment.

The United States Mission's advisory concludes with the simplest possible summary of the position: US citizens are required to enter and depart the United States on a US passport. For the community of Nigerian-Americans for whom that reminder was written, the time to act on it is now — before the flight is booked, before the ESTA is applied for, and before the border reveals that the shortcut was never actually available.

Sources

1. Vanguard News — US warns Nigerians with dual citizenship against travelling on foreign passport: https://www.vanguardngr.com/2026/07/us-warns-nigerians-with-dual-citizenship-against-travelling-on-foreign-passport/
2. Nairametrics — US Embassy warns dual citizens against using foreign passports to enter, leave US: http://nairametrics.com/2026/07/26/us-embassy-warns-dual-citizens-against-using-foreign-passports-to-enter-leave-us/
3. The Sun Nigeria — US issues travel warning to Nigerians with dual citizenship: https://thesun.ng/us-issues-travel-warning-to-nigerians-with-dual-citizenship/
4. Kemi Filani News — US warns Nigerians with dual citizenship against travelling on foreign passport: https://www.kemifilani.ng/news/us-warns-nigerians-with-dual-citizenship-against-travelling-on-foreign-passport
5. Nigerian Eye — US embassy warns dual citizens against travelling on foreign passports: https://www.nigerianeye.com/2026/07/us-embassy-warns-dual-citizens-against.html
6. Iconic Global Magazine — US embassy warns dual citizens against travelling on foreign passports: https://www.iconicglobalmagazine.org/us-embassy-warns-dual-citizens-against-travelling-on-foreign-passports/
7. CiberCuba (English) — The United States government issues an important warning to citizens with dual nationality: https://en.cibercuba.com/noticias/2026-07-19-u1-e135253-s27061-nid335581-gobierno-estados-unidos-lanza-importante-advertencia
8. US Embassy Nigeria — Mission Nigeria Update on Visa Issuance (Presidential Proclamation 10998): https://ng.usembassy.gov/mission-nigeria-update-on-visa-issuance/
9. US Department of State — Suspension of Visa Issuance to Foreign Nationals: https://travel.state.gov/content/travel/en/News/visas-news/suspension-of-visa-issuance-to-foreign-nationals-to-protect-the-security-of-the-united-states.html
10. VisaVerge — US Mission Warns Nigerians Visa Fraud Brings Stricter Scrutiny: https://www.visaverge.com/visa/us-mission-warns-nigerians-visa-fraud-brings-stricter-scrutiny/