this is probable the easiest way to see if any dollar bill is real. simply hold up to the light.
Step 1: Five dollar bill
on the five dollar bill. fives should appear.
Step 2: Ten dollar bill
on the ten dollar bill, when you look on the right side of the bill, you will see a white circle with the word people over it. a head should appear in this circle. in the picture, i shot it on the back side. it shows the same
Step 3: Twenty dollar bill
on the twenty dollar bill, the words "TWENTY USA, USA TWENTY" should dissapear. a head should appear next to the twenty with a green circle thing on it.
Step 4: Try more!
if you have a diffrent dollar bill (1, 2, 100, 50) try this out. it works with every one! please post what you see on diffrent bills.