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We may earn money or products from the companies mentioned in this post. This means if you click on the link and purchase the item, I will receive a small commission at no extra cost to you … you’re just helping re-supply our family’s travel fund.
I’ve spent a lot of time reading arrest reports, consular cables, State Department advisories, and news accounts of Americans detained abroad. Not because it’s cheerful reading — it’s not — but because the patterns that emerge are genuinely useful, and they’re patterns that the travel industry almost never talks about directly.
Here is the pattern that shows up over and over: the person had no idea they were breaking a law. In the overwhelming majority of cases I’ve looked at, the American traveler wasn’t doing something they understood to be risky. They were doing something normal. Something they do at home without a second thought. Something that is, in many cases, completely legal in their home state.
That’s what makes this worth writing about.
The Mistake That Runs Through Almost Every Case
Before we get into specifics, let’s name the fundamental error: assuming that legality travels with you.
Americans are raised in a legal system that is unusually permissive by global standards in certain areas and unusually strict in others. We’ve internalized what’s okay and what isn’t based on a lifetime of living here. When we cross a border, we tend to carry that framework with us mentally — and we don’t update it.
According to the United States Lifesaving Association, the State Department’s own guidance is unambiguous: “While in a foreign country, a U.S. citizen is subject to that country’s laws and regulations, which may differ significantly from those in the United States and may not afford the same protections.” That sentence sounds bureaucratic. It becomes very real when you’re in a holding cell in Dubai at 2 a.m. being asked to explain why you had a bottle of CBD oil in your toiletry bag.
Fifty-four Americans were wrongfully detained or held hostage overseas in 2024 according to the James Foley Foundation — but that number captures only the politically motivated cases. The vast, overwhelming majority of American detentions abroad are for actual legal violations in that country’s jurisdiction. The National Museum of American Diplomacy estimates that drug charges alone account for a huge proportion of American incarcerations overseas. In most of those cases, the person thought they knew what they were doing.
They didn’t. Here’s why.
Cannabis and CBD: The Most Common Trap by Far
This is the one I’d stamp on the boarding pass if I could.
In 2026, cannabis is recreationally legal in 24 US states and medically legal in many more. CBD products are sold at airports, pharmacies, and gas stations across the country. The normalization is complete. People carry CBD gummies, CBD tinctures, CBD-infused topical creams, and THC vape cartridges the same way they carry ibuprofen and chapstick.
Then they fly to a country where possession of any of this is a criminal offense.
Take the United Arab Emirates. The State Department’s own country information page for the UAE is extraordinarily explicit: “Products containing cannabidiol (CBD) are illegal in the UAE. Possession or importation of CBD products, including those found in prescription and over the counter medications in the United States and other countries, are prosecuted in the same manner as marijuana possession.” Read that again. CBD. Not THC. CBD — the non-psychoactive compound that you buy at Whole Foods — is treated legally equivalent to marijuana possession in the UAE. And it gets worse: “The UAE’s anti-narcotics program also includes poppy seeds on its list of controlled substances.” There have been documented cases of travelers being detained for poppy seeds on their clothing from eating a sandwich.
In 2008, British tourist Keith Brown was sentenced to four years in prison after Dubai customs found 0.003 grams of cannabis stuck to the sole of his shoe. He was eventually freed, but the case illustrates how zero-tolerance functions in practice.
Japan is equally strict and getting stricter. As of December 2024, Japan’s revised Cannabis Control Act criminalized the *use* of cannabis — not just possession. That means if you used cannabis legally in California before your flight to Tokyo, and Japanese authorities suspect use based on urine analysis, you can be arrested even if you have no cannabis on you. The first arrest under this provision happened in March 2025. Japanese law firm Sumikawa Law Office specifically flagged “young Americans residing in Japan” as a growing population being arrested, citing different legal standards as a contributing factor in the lack of awareness.
Singapore, Indonesia, Malaysia, and the Philippines all have mandatory minimum prison sentences for cannabis possession that would be unthinkable under US law. Indonesia’s minimum for possession is four years. The Philippines, under certain circumstances, carries a potential life sentence.
The rule is simple: leave all cannabis and CBD products at home. Every single product. Check the ingredients list on anything you pack — CBD shows up in unexpected places, from sleep gummies to muscle rub to lip balm.
Your Prescription Medications Could Be a Controlled Substance Abroad
This one is subtler and, in some ways, more dangerous because people feel protected by the fact that they have a prescription.
A prescription from a US doctor carries zero legal weight in most foreign countries. It tells customs officials you were authorized to obtain the medication in the United States. It does not tell them you’re allowed to have it in their country. These are entirely separate questions.
The categories of medications most commonly creating problems for American travelers:
ADHD medications (Adderall, Ritalin, Vyvanse). Amphetamine-based ADHD medications are controlled substances in Japan, South Korea, and many other countries. Carrying Adderall into Japan without prior approval from the Japanese Ministry of Health is a criminal offense. The same medication that millions of Americans take every morning with breakfast could result in arrest and deportation with a permanent ban on re-entry.
Benzodiazepines (Xanax, Valium, Klonopin). These are controlled or restricted substances in a wide range of countries. The UAE specifically prohibits certain medications containing psychotropic substances. If you’re transiting through Dubai with anti-anxiety medication, check before you go.
Opioid pain medications. Many countries require advance authorization to import opioid-based painkillers even in quantities for personal medical use. Japan requires a “Yunyu Kakunin-sho” import certificate for certain controlled substances. Failing to obtain this before travel is a violation.
Certain antibiotics and other common drugs. This varies wildly by country. The CDC Yellow Book on traveling with medications specifically notes that consequences for being caught with a restricted medication include “delay in travel, confiscation of the medication, denial of entry, or arrest.”
The practical takeaway: for any trip outside North America and Western Europe, look up your specific medications in the destination country’s controlled substance list. Don’t assume. The US Embassy or consulate in your destination country can usually provide guidance, and the destination country’s own embassy in Washington, DC can confirm.
Photography Near the Wrong Building
Every country has buildings you cannot photograph. Most don’t advertise this clearly in tourist materials.
Military installations, presidential palaces, and border crossings are obvious. Less obvious: power plants, bridges, rail yards, telecommunications facilities, and government administrative buildings in countries with active security concerns. In some countries — Sudan, South Sudan, and parts of Central Asia — the list of prohibited photography subjects is extraordinarily broad and the enforcement is real.
Saudi Arabia has arrested tourists for photographing certain public buildings. Egypt has a documented history of detaining photographers near government facilities, bridges, and metro stations. In Turkey, photographing military installations is illegal under Article 25 of the Turkish Military Zones and Military Security Zones Act, and the definition of “military installation” is broad enough to cause genuine confusion.
Russia, before the current conflict made it moot for American travelers, was notorious for detaining people photographing anything near the Moscow Metro, certain museums, and even ordinary public infrastructure. China maintains restrictions on mapping applications and photography near government buildings and military zones that are actively enforced.
The practical rule: if you’re unsure, ask before shooting. If you’re in a country with significant security tensions, don’t photograph infrastructure at all.
Running Out of Gas in Germany (Yes, Really)
This sounds absurd. It is also real.
Running out of fuel on the German Autobahn is an administrative offense under German traffic law. The logic is that a driver is responsible for ensuring their vehicle is in proper working condition before entering a high-speed highway. Allowing your fuel to drop to empty is considered negligence — a preventable breakdown — not an accident. A stop of less than three minutes can result in a €35 fine. A longer stop — which, realistically, any breakdown will be — is classified as parking on the Autobahn and carries a €70 fine. In the most serious circumstances, if running out of fuel causes an accident, the charge escalates to gross negligence with significantly more severe penalties.
This isn’t just Germany. Austria and Switzerland have similar provisions. The rule in these countries is that the Autobahn is not a place where your car is allowed to become a hazard — and “I forgot to fill up” is not an acceptable explanation.
Alcohol Rules That Will Blindside You
The legal drinking age in the US is 21. In most of Europe, it’s 18. In much of the Islamic world, alcohol is illegal for anyone, including tourists, in public spaces. What trips Americans up isn’t usually the obvious stuff. It’s the in-between cases.
Sri Lanka recently began enforcing restrictions on women purchasing alcohol in restaurants, which created a brief international incident when female tourists tried to order drinks. In Bhutan, alcohol is banned on certain national holidays — including days that might not appear on any tourist calendar you’ve consulted.
Booze on the beach is legal in some parts of the Caribbean and illegal in others. In Barbados, drinking in public outside of licensed premises was illegal. In the Maldives — a popular luxury destination — alcohol is only available in the resort islands and is illegal to bring through the airport even if you purchased it duty-free in transit.
And in many countries, the public intoxication laws are enforced against tourists in ways they simply aren’t enforced at home. Being obviously drunk in public in Singapore can result in arrest. The same is true in the UAE.
Hand Gestures and “Harmless” Behavior That Isn’t
American hand gestures do not translate universally. The thumbs-up, widely understood in the US as positive approval, is an obscene gesture in parts of the Middle East, West Africa, and Latin America — functionally equivalent to an extended middle finger. The OK sign (thumb and forefinger in a circle) is offensive in Brazil and Turkey. The “come here” gesture (curling a finger toward yourself) is considered deeply disrespectful in the Philippines.
These are not usually arrest-level offenses. But they can escalate a routine police interaction into something far more serious, and in countries with aggressive security forces, behavior that reads as disrespectful can turn a misunderstanding into a detainment.
More practically dangerous: jaywalking is enforced in Singapore and many parts of Southeast Asia with fines that can surprise American travelers. Littering in Singapore can result in a $300 SGD fine for a first offense, community service for a repeat, and ongoing enforcement stings that specifically target tourists who seem unaware. Chewing gum in Singapore is prohibited entirely unless it’s therapeutic gum obtained from a pharmacist.
In Thailand, disrespecting images of the royal family — the law of lèse-majesté — is a criminal offense carrying up to 15 years in prison. This has resulted in arrests of foreign nationals for Facebook posts, jokes, and even the direction a person’s feet were pointing during a royal ceremony.
What To Do If You’re Detained
Know this before you travel anywhere:
Immediately ask to contact the nearest US embassy or consulate. Under the Vienna Convention on Consular Relations, foreign governments are required to inform you of this right and to notify consular officials if you request it. Not all countries follow this protocol without prompting.
Do not sign anything without understanding it. Police in some countries will present paperwork in the local language and ask for a signature. Signing an admission without knowing what it says is a serious mistake.
Get a local attorney as soon as possible. The US Embassy can provide a list of local attorneys. They cannot represent you or intervene in legal proceedings, but they can visit you, check on your welfare, and help with communication.
Do not resist, argue loudly, or make a scene. This is harder than it sounds when you know you haven’t done anything wrong by American standards. It is still critical. In many countries, a combative detainee is treated very differently than a cooperative one.
Travel smart. Know the laws where you’re going. The time to read the rules is before you board the plane — not after you’ve handed your bag to a customs officer in a country where the thing inside it is a felony.
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