How to Spot Counterfeit Currency

The U. S. Secret Service recommends that you educate yourself in regards to the proper positioning of key features on the most common paper currencies. These public domain images (courtesy U. S. Secret Service) show the correct positions of fifteen different features of the modern $10, $20 and $50 U. S. bills.

****The 2004 series of bills brought on some big changes. The $10, $20, and $50 bills were redesigned with several tweaks to their overall look, most notably the addition of more colors. It's quite likely the most critical new security feature is the addition of Constellations (see right photo), a specific arrangement of symbols or numbers which makes many color photocopiers to refuse to copy the bill.
****The $1 and $2 bills have fewer security features than other denominations. This is rarely an issue because fakers seldom attempt to manufacture these smaller bills.
****It's a misnomer that if the ink smears when you rub the note on something, the bill isn't genuine. This isn't necessarily true, but ink that smears doesn't mean the bill is genuine, either.
****The United States Secret Service and the Treasury Department don't advise relying only on a counterfeit detection pen-the kind you often see clerks use in stores. The pens simply indicate whether the a bill is printed on the wrong kind of paper (reacting to the presence of starch). Because of this, they'll catch some counterfeits, but won't detect more hi-tech fakes and will give some false-negatives on real money that's been through the wash.
****Raised bills are a very simple and unsophisticated type of fake notes in which numerals are cut and glued onto a lower denomination bill to make it look like it's a higher denomination. These counterfeits are easy to detect by merely comparing the numbers in the corners to the denomination printed in letters at the bottom part of the currency.
****The ink used in U.S. currency is actually magnetic, but this is not a method for detecting counterfeits. The power is quite faint and is only helpful for automatic bill counters. If you use a magnet you cannot lift a real bill, but you can clearly see that it is magnetized.

++In 2001, a man bought a sundae at a Danville, Kentucky, Dairy Queen with a $200 bill featuring President George W. Bush and received $197.88 in change.

++In September 2003, a North Carolina man named Travis Martin used a $200 bill at a Food Lion to purchase $150 in groceries; the cashier accepted the fake bill and presented Martin with $50 in change.