How to Detect Counterfeit US Money

Feel the texture of the bill

Do not forget to read the comments section to read about what others have to say concerning counterfeit money. Feel the texture of the bill. People who handle money many times, such as
cashiers, can identify a lower-quality fake bill instantly just by touching it. You
may not have that much experience, but just about everybody has handled
enough money that they can detect many counterfeits simply by feeling the
texture, and paying attention (the paper that bank notes are printed on is not sold
commercially; furthermore, the composition of the paper and ink is confidential).
Genuine currency has slightly raised ink. You should be able to feel the texture of
this ink, especially if you are holding a new dollar bill.

How to spot a counterfeit bill

Compare the bill with another of the same denomination and series

Compare the bill with another of the same denomination and series. If the
bill feels all right, or if you are a little suspicious but unsure, hold the bill side by
side with another bill. Different denominations, obviously, look different, so get a
note of the same amount. Also, all denominations, except the $1 and $2, have
been redesigned at least once since 1990, so it is best to compare the suspect
bill to one in the same series, or date.

Notice the relative flatness and lack of detail on the fake bill

Notice the relative flatness and lack of detail on the fake bill. Look carefully
at the printing quality. Real U.S. bills are printed using techniques that regular
offset printing and digital printing (the most popular tools for all but the most
sophisticated counterfeiters) cannot replicate. Look for blurry areas, especially in
fine details such as around the borders–real bills have clear, unbroken borders–
and on the Federal Reserve and Treasury seals, where the saw tooth points
should be sharp and well-defined in genuine bills. Portraits in fake bills may
appear dull, blurred, and flat, while in real currency, the portraits are sharp and
contain very fine detailing.

Look for colored fibers in the paper

Look for colored fibers in the paper. All U.S. bills have tiny red and blue fibers
embedded in the paper. Counterfeiters sometimes try to reproduce these by
printing or drawing these fibers onto the paper, but close inspection reveals,
however, that on the counterfeit note you will see that they are printed on, rather
than being part of the paper itself.

Examine the serial numbers

Examine the serial numbers. Make sure that the serial numbers on a bill match,
and look at them carefully. Fake bills may have serial numbers that are not
evenly spaced or that are not perfectly aligned in a row. If you received multiple
suspicious bills, see if the serial numbers are the same on both bills. If they are
the same, then they are counterfeit notes.

Look for security features in all denominations,

Look for security features in all denominations, except the $1 and $2. The
easiest way to spot a fake $5, $10, $20, $50 or $100 bill is to look for the
following security features, all of which are very difficult to fake.

Look for a security thread (a plastic strip) running from top to bottom.
Beginning in 1990, an embedded (not printed) security thread was added
to all bills except the $1 and $2 bills. If you hold the bill up to the light, you
will see the strip and printing on it. The printing will say “USA” followed by
the denomination of the bill, which is spelled out for $10, and $20 bills but
presented in numerals on the $50 and $100 bills. The $5 bill will say “USA
5”. These threads are placed in different places on each denomination to
prevent lower-denomination bills being bleached and reprinted as higher
denominations. Compare a genuine bill of the same denomination, to
make sure that the position of the thread is correct. If it is not, the bill is not
genuine.
 The $5 bill has “USA FIVE” written on the thread, the $10 bill has
“USA TEN” written on the thread; the $20 bill has “USA TWENTY”
written on the security thread; the $50 bill has “USA 50” written on
the thread; and the $100 bill has the words “USA 100” written on
the security thread. Micro-printing can be found around the portrait
as well as on the security threads.
 Hold the bill up to a black light. If authentic, the security thread in
the bills will glow: the $5 bill glows blue, the $10 bill glows orange,
the $20 bill glows green, the $50 bill glows yellow and the $100 bill
glows pink.
o Hold the bill up to a light to check for a watermark. A watermark bearing
the image of the person whose portrait is on the bill can be found on all
$10, $20, $50, and $100 bills series 1996 and later. The watermark is
embedded in the paper to the right of the portrait, and it can be seen from
both sides of the bill. The $5 bill has a numeral 5 watermark to the right of
the President and 3 smaller numeral 5’s to the left of President Lincoln.
o Tilt the bill to examine the color-shifting ink. Color-shifting ink (ink that
appears to change color when the bill is tilted) can be found on 100, 50
and 20 dollar bills series 1996 and later, and on 10 dollar bills series 1999
and later; $5 and lower bills do not yet have this feature. The color
originally appeared to change from green to black, but it goes from copper
to green in recent redesigns of the bills.
o Use a magnifying glass to examine micro-printing. Beginning in 1990, very
tiny printing was added to certain places (which have periodically been
changed since then) on $5 and higher denomination bills. The exact
location of the micro-printing is not generally an issue. Rather, counterfeits
will often have either no micro-printing or very blurred micro-printing. On a
genuine bill, the micro-printing will be crisp and clear.
o Run your fingernail over the portrait’s vest of the bill. You should feel
distinctive ridges, printers cannot reproduce this.
Look for differences, not similarities. Counterfeit bills, if they’re any good at
all, will be similar to real ones in many ways, but if a bill differs in just one
way, it’s probably fake