Clarify what occurred and why you’re suspicious. The police will most likely have a copyright detection pen which they can use to mark the bill. If your mark turns darkish, it’s possible the bill is fake. Fakes also don't have typical luster, where existing it's got a Odd foggy/hazy search, https://troyboyhq.jiliblog.com/91011343/detailed-notes-on-fake-us-dollar-bills