Counterfeiters work in mysterious ways and the technologies they use are constantly advancing. The new series of US bills, newest being the 10, have been introduced as an attempt to stop counterfeiters in their tracks. The list of security features will make it much harder to pass off any kind of fake.
About the New $10 bill
The new $10 bill, the third bill to be redesigned in the series, includes oranges, yellows and reds along with images of the Statue of Liberty's torch and the words "We the People" from the United States Constitution. The new $10 note was introduced on March 2, 2006.
Security Features
The new $10 also has three of the most important security features that were first introduced in the 1990s and are easy to check: color-shifting ink, watermark and security thread.
Color-Shifting Ink: Tilt your ten to check out the number "10" in the lower right-hand corner on the front, and the color changes from copper to green. Cool, huh? The color shift is more dramatic on the redesigned notes, making it even easier for people to check their money. 
Watermark: Hold your ten up to the light to see a faint image of Alexander Hamilton appear to the right of his large portrait. It can be seen from both front and back. On the redesigned $10, a blank oval has been incorporated into the design to highlight that sweet watermark location. 
Security Thread: Hold your ten up to the light and make sure there's a small strip embedded in the paper. The words "USA TEN" and a small flag are visible in tiny print. It runs vertically to the right of the portrait and can be seen from both front and back. This thread glows orange when held under ultraviolet light.
The U.S. government expects to redesign its currency every seven to ten years.
Design Features
Symbols of Freedom: New “symbols of freedom” with icons of old school America are part of the new design series. Two images of the torch carried by the Statue of Liberty are printed in red on the face of the new $10. A large image of the torch is printed in the background to the left of the portrait of Hamilton, while a second, smaller metallic red image of the torch can be found on the lower right side of the portrait.
Color: The most noticeable difference in the newly designed $10 is the addition of background colors of orange, yellow and red. The words "We the People" from the U.S. Constitution have been printed in red in the background to the right of the portrait. Also, little yellow 10s have been printed in the background to the left of the portrait on the front of the note, and on the right of the picture on the back.
Portrait and Vignette: The oval borders and fine lines surrounding the portrait of Hamilton on the front, and the United States Treasury Building picture on the back, have been removed. The portrait has been moved up and shoulders have been extended into the border.
In addition, the new $10 note also retains a number of other existing design features.
Microprinting: The redesigned $10 note features hard to replicate microprinting on the front of the bill in two areas: the word "USA" and the numeral "10" can be found repeated beneath the large printed torch, and the words "THE UNITED STATES OF AMERICA" and "TEN DOLLARS" can be found below the portrait.
Low-Vision Feature: The large numeral "10" in the lower right corner on the back is easy to read.
Federal Reserve Indicators: A universal seal to the left of the portrait represents the entire Federal Reserve System. A letter and number beneath the left serial number identify the issuing Federal Reserve Bank.
Serial Numbers: The unique combination of eleven numbers and letters appears twice on the face of the note.
So with all the changes made, but with the good olel American feel still present, we can protect our economy and have a new exciting look and attitude with our currency.
