The 7 Currencies Counterfeiters Target Most

Counterfeiters have targeted currency for centuries, adapting their methods as printing and digital technology improve. In response, modern banknotes now use security features such as holograms, watermarks, microprinting, and color-shifting ink to make convincing copies harder to produce.

Some currencies remain especially attractive because they circulate widely, carry high values, or are accepted around the world. In this slideshow, History Computer examines seven currencies counterfeiters target most and explains what makes each one vulnerable.

The U.S. dollar is the world's reserve currency and the most counterfeited. The $20 and $100 bills are particularly common targets. American currency is still wood-based, unlike the polymers now used in some other countries' banknotes. However, this does make it possible to use a counterfeit detector pen, as you have no doubt seen when spending cash in a store. The ink of this pen leaves a dark mark on a counterfeit bill that is made with wood-based paper. On a fiber-based paper like the government uses in real banknotes, the mark remains a pale yellow color.

As the second most traded currency, the Euro is heavily counterfeited. The 20 and 50 Euro notes are popular targets for criminal activity. These are used across most of Europe so there are nearly infinite ways to move fake money around and find ways to convert it to legitimate, untraceable currency.

The 20 pound note is the most counterfeited denomination in the UK. Newer banknotes, like the 2024 10 pound note pictured above with the new king's portrait, are more difficult to copy as Britain is using polymer for its money now rather than paper.

High-denomination notes like the 500 and 2000 rupee bills are prime targets of counterfeiters in India. Denominations that are frequently used do not arouse as much attention and suspicion when counterfeiters spend them.

The most commonly counterfeited banknote in China is the 100 yuan note. China's booming economy that is a mixture of socialism and market principles creates many opportunities for fraud, especially when passing banknotes off to people who may have a less sophisticated understanding of what to look for.

Canada uses a modern polymer for its banknotes, which has drastically reduced counterfeiting. However, there are still older paper notes in circulation, so counterfeiters can make copies of the old ones and get them exchanged for new banknotes in transactions.

Australia's money is made of a polymer that is pretty hard to replicate. So it is not one of the most counterfeited currencies, but counterfeits have been made and are pulled from circulation from time to time.

Some of the most sophisticated technologies governments have developed to identify real money include:

• Holographic strips with an image that moves when you turn the bill different angles.
• Watermarks, which are images that are invisible until you hold them up to a light.
• Color-shifting ink changes color depending on the angle you look at it.
• Security threads are thin strips woven into a banknote that sometimes glow under UV light.
• Microprinting is text that is so tiny a regular printer will not be able to copy it clearly.
• Polymer banknotes are used in Australia and Canada because they are durable and hard to counterfeit

You might encounter a fake banknote in any situation where someone is paying for something and getting a lot of change back. Here are some things the "experts" recommend for your situation:

• Feel the texture of the paper and compare it to another banknote if you're uncertain.
• Hold the banknote up to the light to see if the watermark is a correct match for the printed information they have.
• Look for a security thread as this is difficult to fake.
• Check the bill under UV light, as some banknotes have a glow-in-the-dark feature that can confirm it is most likely a legitimate person. Well, a real once I guess.
• Look at fine details under a magnifying glass if you have one or with the magnifying feature on your phone camera. Are the fine details blurry or run together? That could be a sign of a counterfeit.

If you suspect you have a counterfeit bill, take it to the bank or a police station for verification. If it is fake, they will report the matter to the Secret Service for investigation.

North Korea is one of the world's foremost counterfeiters of U.S. dollars.

It would be a mistake to think of counterfeiters as small-time criminals running inkjet printers in a dark basement somewhere. Some are at that level of operation, but there are also drug cartels and mafia organizations mass-producing high-quality fakes with advanced technology. And sometimes a government is the prime suspect. North Korea has been linked to the production of high-quality fakes of U.S. dollars. This serves the dual purpose of bringing the country some hard currency for trade on the international market, and undermining the American economy by weakening the demand for dollars.