USA but perhaps relevant:
Imagine you are docilely going through the long security line at John F. Kennedy International Airport, headed for your overnight flight to London Heathrow. As your carry-on bag goes through the X-ray, a burly TSA agent is called over to confer with the machine operator. He then looks at you and says: "Please come with me, sir."
As you are led to a small cubicle, you nervously try to think of what you might have done wrong. While you open your bag as instructed, the stern-faced TSA agent points to a small package and demands to know what it contains. Inside are antique, collectible gold coins that you intend to sell to the same British dealer from whom you bought them years ago, but now they are worth much more.
Now the agent says: "I'm sorry, sir, I will have to confiscate them, but I will give you a receipt. You have the right to file an appeal."
You stand there dumbfounded, the whole purpose of your journey destroyed.
Serious problems can arise when gold or silver coins (or any precious metals) are transported personally out of the U.S. to other countries by auto, airplane, boat or public transportation - or the reverse, when entering the U.S.
In May 2010, the Houston reported that U.S. Immigration and Customs (ICE) agents and Border Protection officers at Houston's George Bush Intercontinental Airport confiscated more than $250,000 in cash and almost $160,000 in gold and silver in 14 separate seizures from individual travelers during that one month alone.
If you must personally carry coins, my advice is to contact the nearest office of the U.S. Customs and Border Protection Agency, well ahead of travel, and explain what you propose to do and ask them how you can conform to the law. You should ask for and receive a written response so that you can show it if questioned by ICE agents. Also ask Customs if you need to notify them of your date and departure flight as a precaution against the very real possibility that a local Customs agent at the airport may not know the rules that cover this situation.
You will need to complete and bring with you a Census Bureau Form 7525-V, Shipper's Export Declaration. This form is required for exported commodities with a value exceeding $2,500. At current silver and gold prices, many coins would exceed this reporting threshold.
Failure to file this declaration can result in seizure. The consequences for stating incorrect information are severe, including confiscation. They may also result in a fine of up to $10,000 and/or imprisonment.
To read the complete article, see: Traveling With Precious Metals (
www.internationalman.com/78-global-perspectives/808-traveling-with-precious-metals)