Do you go through border control when leaving the US?

At a Glance: Customs control is the process of regulating the entry of items into a country. Passengers generally go through customs when entering a country, not when leaving. When flying to the United States, all travelers must clear customs upon arrival.



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In most cases, you'll go through customs and immigration after your flight first arrives in a new country, but there are exceptions. For example, some countries have mutual agreements intended to help speed travelers through the process, so you may go through customs and immigration before you board.

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All your luggage including carry-ons will go through a scanner. Once you give your customs form (one per family) to the agent you'll be asked to press a button. A green light means go on ahead and if you get the red light the agents give your bags a more thorough inspection which usually take a couple minutes.

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You are allowed to bring enough medicine for the time period you will be in Mexico. If you are bringing an unusual quantity of medicine please bring a doctor's prescription just in case you need to prove the medicine is for your own consumption.

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Items Not Allowed in Mexico:
  • Guns or ammunition. ...
  • Pepper spray.
  • Lethal knives and machetes (anything over 8” is not allowed)
  • Live predator fish.
  • Totoaba fish (fresh or frozen)
  • Turtle eggs.
  • Poppy seeds or flour of poppy seeds.
  • Marijuana, medicinal marijuana, marijuana products, marijuana seeds or spores, or marijuana extracts.


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Passport control, that will depend, but you would need to pass through it again to be readmitted to the country and some places may not allow you that. What are the things that you cannot bring into an airport but can carry them onto your flight from outside of the airport's security check point area?

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