There are several features of currency change machines that allow them to distinguish between real and fake money. A bill acceptor may use a cluster of Light Emitting Diodes (LEDs) to shine light onto bills when they are inserted. ... Next, the coin must pass through a slot which checks diameter.
Eventually, how do machines tell the difference between bills?
Instead of magnetic heads, they use photocells to detect the various shades of ink on a given bill. They read the difference in ink on the bills you put into the vending machine and are able to determine if the bill is fake and what denomination it is.
In spite of everything, what happens if you take a fake bill to the bank? If you unknowingly present a counterfeit bill to a bank for deposit, they will confiscate the bill, reduce your deposit by the amount of the counterfeit bill, and initiate an inquiry and report. The bill will be sent to the U.S. Secret Service and you will be the loser.
More than that, what do fake $100 bills look like?
The Security Strip is a thin, faint embedded strip that runs vertically across the note from top to bottom, just to the left of Ben Franklin in the $100 bill. The thread should be visible from both sides of the note. The thread in a $100 bill glows pink when illuminated by ultraviolet light (UV).
Do vending machines take 100 dollars?
Vending machines don't take big bills unless they are equipped with a bill acceptor that gives change in bills. ... The float in most coin mechs would most likely be a max of about $120, so you can imagine if you purchased a $2 chocolate with a $100 bill, the amount of coin you'd have in your pocket ?!