Many people believe that if their visa is valid, entry into the United States is guaranteed. It is not. U.S. Customs and Border Protection (CBP) says it plainly: having a visa does not guarantee entry into the country. This applies to tourists visiting family, professionals on TN or H-1B visas, E-2 investors, and students. If you or someone in your family is traveling soon, here is what you need to know.

So what does a visa actually do?

A visa means a consular officer reviewed your application and found you eligible to travel for a specific purpose. With it, you can arrive at an airport or land border and ask to be admitted. But the CBP officer makes the decision. That officer reviews your visa type, the purpose of your trip, your immigration history, and whether there is any legal reason to deny you entry.

Why might I be sent to secondary inspection?

At primary inspection, the officer checks your passport and visa and asks a few questions. If more review is needed, you are sent to a second area: secondary inspection. That does not mean you did something wrong. It can happen because of:

• Missing or inconsistent documents.
• Answers that don’t match your visa type.
• An alert in the system.
• A past immigration problem, such as staying longer than allowed.
• A past arrest, even one that did not lead to a conviction.
• Signs that you worked without authorization.
• Your travel pattern. For example, on a tourist visa, spending long periods here and very little time at home can suggest you actually live or work in the United States.

What happens in secondary inspection?

You may be asked in detail why you are coming, how long you will stay, where you work, how much you earn, whom you are visiting, and about your past trips. Everything you say can be recorded and reviewed in future visa or green card applications.

CBP can also inspect your phone and laptop. According to CBP, fewer than 0.01% of international travelers had their devices searched in fiscal year 2025. It is uncommon, but it happens. If you are a foreign national and refuse to allow your phone to be inspected, CBP may take that into account when deciding whether to admit you. That is why what you post and keep on your phone should match the purpose of your trip.

Can my visa be canceled at the airport?

Yes. Even if your visa was valid when you boarded the plane, the officer can make one of several decisions:

1. Admit you.
2. Allow you to withdraw your application for admission and return on the next flight. This is at the officer’s discretion; it is not a right.
3. Cancel your visa.
4. Find you inadmissible.
5. Place you in expedited removal. This is a removal order issued without a judge, and by law it bars you from returning for 5 years.

These outcomes are not the same. Withdrawing your application and flying home does not carry the same consequences as expedited removal. That is why, if you were turned away at the airport, the first step is to find out exactly what CBP decided.

What we see in practice

• You changed employers on a TN or H-1B and your visa stamp is old: instead of traveling with the new I-797 and the old stamp, we recommend getting a new visa stamp at the consulate. We have seen people denied entry with that combination.
• Your green card application is pending: do not leave the country without talking to us. Even with an approved travel permit, re-entry is not guaranteed.
• Your I-94 has an error: this is more common than you might think. It can be corrected at CBP’s deferred inspection office at the airport. Don’t let it slide.
• Answer truthfully, briefly, and consistently. Don’t guess, don’t exaggerate, and don’t change your story.

What we recommend

1. Review your history before you travel if you ever stayed longer than allowed, worked without authorization, were arrested, had a visa denied or canceled, or changed jobs or status.
2. Carry documents that match your trip. Tourists: a return ticket and proof of your job and home abroad. Workers: an employer letter, recent pay stubs, and your approval notice (I-797). Investors: current documents for your business.
3. Only do what your visa allows. On a tourist visa, you cannot work or study.
4. Review your social media and your phone. What you post should match what you say in your interview.
5. If you were turned away, keep everything: any papers you were given, the marks in your passport, and notes on what happened. Do not apply for a new visa or travel authorization before talking to an attorney.

If I was already denied entry, is there a solution?

It depends on what happened. First, we review the documents CBP gave you and, if needed, request your file from the government. With that information, we determine whether you can apply for a visa again and whether a waiver applies to your case. Some temporary visas have a special waiver, but it does not work in every case.

Need help?

The best time to review your case is before you travel, not in front of the officer. If you have an upcoming trip and something in your history worries you, or if you were already turned away at the airport, schedule a consultation with our San Antonio office.

This article is general information and is not legal advice for your case. Fernanda Inegol, Barba Inegol Law Firm PLLC.

Sources: CBP: Requirements for Immigrant and Nonimmigrant Visas · CBP: Border Search of Electronic Devices · INA section 235 (8 U.S.C. 1225) · INA section 212 (8 U.S.C. 1182) · 8 CFR 235.4, withdrawal of application for admission · Topic inspired by AILA, November 3, 2026