Hold the note to light to see an embedded thread running vertically to the left of the portrait. The thread is imprinted with the letters USA and the numeral 100 in an alternating pattern and is visible from both sides of the note. The thread glows pink when illuminated by ultraviolet light.
Security Thread All genuine FRNs, except the $1 and $2, have a clear thread embedded vertically in the paper. The thread is inscribed with the denomination of the note and is visible only when held to light. Each denomination has a unique thread position and glows a different color when held to ultraviolet (UV) light.
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.
Australian banknotes are printed on plastic and have a distinct feel. A suspect banknote may feel excessively thick or thin compared to a genuine banknote. It is difficult to start a tear along the edge of a genuine banknote. You can also try scrunching the banknote in your hand – a genuine banknote should spring back.
A $100 bill printed after 1990 should have a security thread on the left-hand side that is only visible when you hold the bill up to the light. The words “USA” and “100” should alternate on the thread. If you hold the bill up to UV light, then the thread glows pink.
Yes, you can't use a photocopy machine to copy money. If you try to print currency notes using any modern printing or scanning device, they will refuse to assist you in this criminal effort. Some might even have shut down completely.
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Generally, fake money “does not have the crisp money feel and the raised feeling of the black ink on the front of the bills," he says.
All ATMs are equipped with an electronic sensing eye and other scanning devices in order to detect bogus money. Besides, they record transaction details, personal activity and the user's face using in-built cameras.
The banks use their counterfeit currency detection measures and technologies to determine whether or not the note is genuine. Any fake money encountered is confiscated, and the Secret Service is called in. This keeps the counterfeit money out of circulation.
Each of the bills also has the word “COPY” printed above the “100″ in the lower left corner on both sides. It's in small print and could be overlooked unless you look for it.
A counterfeit pen reacts to the starch found in most types of paper. Genuine U.S. currency is printed on paper that does not have starch. Therefore, if the bill is genuine, the ink will turn yellow and if it's fake, the ink will turn black or dark blue.
There are a few reasons your hard-earned dollars are magnetic. To start with, bills of every denomination are printed with a special ink that contains iron filings--much like ferrofluid. This means that bills are paramagnetic, meaning they're only magnetic in the presence of another force.
Scam detection
With a money counter machine, you can easily detect fake bills as the machine features various detection modes. The machine will also instantly notify you whenever it receives counterfeit bills.
Using different counterfeit detection technology, including Ultraviolet (UV), Magnetic (MG) and Infrared (IR), currency is scanned for fluorescent symbols or brightening agents — something impossible to do with the naked eye — to determine the legitimacy of the bill.
Ultraviolet glow: If the bill is held up to an ultraviolet light, 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 red – if they are authentic.
Serial Number
A unique combination of eleven numbers and letters appears twice on the front of the note. Each note has a unique serial number. The first letter of the serial number corresponds to the series year. A “star” suffix is used to identify notes that serve as replacements during the production process.
The New Zealand dollar is made of polymer (a type of plastic), which is designed to be harder to forge. And the notes have several security features to make them harder to counterfeit.
The $100 banknote retains the portraits of Sir John Monash and Dame Nellie Melba, which are drawn from the same source photographs represented on the first polymer $100 banknote. The banknote celebrates the contributions of these two outstanding Australians. Sir John Monash was an engineer, soldier and civic leader.
We Sell Rare Australian $100 Polymer Banknotes
Some notes can be particularly valuable with the right serial numbers or if in mint condition, the rarest polymer 100 dollar bill can reach up to $2,750 each.
Counterfeiting in Australia has been steadily declining since its peak in 2015. The Bank received around 17,000 counterfeits in 2021 with a total value of just over $1,300,000. This is small relative to the total number of banknotes in circulation (at around 2 billion notes, worth $102 billion).