To be fair, she probably didn't know it was a fake unless she was some kind of drug dealer granny or something.

As someone that would not be able to tell you if a note was fake at a glance, I'd feel awful tipping someone with a fake bill. That sucks for you, OP.

Ugh. Was it one of those horrible things that looks like a folded $20 bill but has a Bible tract inside?

Depending on how the note looked, I'd report her to the cops for passing counterfeit money. She may be doing it other places too. If people keep on saying nothing, she will keep on getting away with it. And if she didn't know, assuming the police find her she can tell them where she got the note, and help narrow down the source so the real culprit can be caught and stopped.

If restaurants paid their workers a decent wage, they wouldn't have to live off tips. That way when assholes like this do this, it wouldn't be an FML.

Yeah, had that happen to me when I was a server. It looked like a $20 folded in half but was really just a religious tract explaining why I should've been in church on Sunday instead of waiting tables. Some people just don't get it.

I feel your pain OP. I waited on a couple some months ago where the woman was very nice and talkative to me, she asked me for a cigarette and promised me a "big tip" for helping her out (I don't smoke so I had to pay a coworker for one). I guess her idea of a big tip was to slip out to smoke it and have her boyfriend leave to take a phone call and neither of them come back at all leaving me to pay their tab. (Which is illegal for my job to force me to do but the loophole is I live in a "right to work" state so they can actually fire me without cause so the last thing any of us want to do is give them one so we servers pay walk out tabs) so her "big tip" was having me pay my coworker for a smoke, tip out the bar for their drinks, that I paid entirely for because I was stuck with their tab. The worst part was that was my last week on the job before I had to take a 6 week leave for surgery with zero income so I was trying to collect enough cash to pay the next 2 months rent and you know, eat and pay my pain medicine copays. I was so mad I literally cried.

Maybe she just didn't realize that the bill was fake.

This is actually a popular "trend". They leave what looks like a folded 20 under the edge of a plate. When you pick it up it turns out to be a flier preaching to you and urging you to convert to their religion. Not the same as accidentally leaving a counterfeit bill at all.

"today, I'm a waitress" role playing or what?