Here’s a quick test that makes you look like a pro. Take your fingernail and gently scratch the collar of Jackson’s coat on the real bill. You should feel raised, textured ridges — that’s intaglio printing, and it’s tough to fake.
Most counterfeiters use flat ink, so the coat will feel smooth as butter. If it feels like he’s wearing a flat t-shirt instead of a textured suit, run away. Your nail is now a counterfeit-sniffing tool.
Just don’t scratch too hard, or you’ll owe the real bill an apology.