American travelers are warned to check their bags before going overseas. They could face big fines or prison time if they have one certain item.

US officials remind travelers that taking cannabis across international borders is still illegal in many countries. This is after Thailand introduced a new policy with harsher penalties for violators.

Thailand now has tougher penalties for travelers caught with cannabis. They could face up to 10 years in prison, a fine of up to $15,000, or both.

Traveling with cannabis? There's a major health warning from the TSA.

Fox News Digital asked the Civil Aviation Authority of Thailand for a comment.

Even though Thailand made cannabis legal in 2022, it's still illegal to import or export it without permission.

Officials warn Americans to check their luggage for cannabis before traveling abroad.

A New York-based cannabis lawyer says travelers should never assume the laws at home apply when they cross an international border.

While some countries are relaxing cannabis laws, it's still mostly illegal worldwide. When you travel, you're subject to the laws of the country you visit.

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A lawyer points to the case of WNBA star Brittney Griner, who was jailed in Russia for having cannabis oil in her luggage.

There's no safe haven when traveling internationally. Even a mistake is not an excuse.

Travelers should never assume the laws at home apply abroad.

A travel expert says many people mistakenly think something legal at home is legal everywhere.

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Even with a medical prescription, cannabis might not be allowed at your destination. Some countries have very strict drug laws.

An expert says people should check local laws and empty their bags of forgotten items.

Some countries have strict laws on everyday items. Research before packing.

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Many people walk around with items they don't know are restricted in other countries.

The TSA updated its guidance for medical marijuana on domestic flights.

Experts advise checking local laws, emptying bags, and not assuming customs will overlook mistakes.

While the TSA allows some medical cannabis, international travel is different.

Crossing borders with cannabis is subject to the destination country's laws.

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The TSA may refer suspected law violations to local law enforcement.

Khloe Quill contributed to this report.

Kelly McGreal is a production assistant with Fox News Digital.