IBC Teller Training Practice Test

Color-shifting ink is a quick way to verify a bill’s authenticity by tilting it to see a color change. On the fifty-dollar bill, the large numeral in the lower-right corner uses ink that shifts from copper to green when you tilt the note. This copper-to-green shift is a distinctive feature of that denomination, helping you identify it at a glance. Other bills rely on different security features, like the blue 100 in the newer hundred, rather than this copper-to-green corner shift.