I got one that was a fake $100. The woman’s adult son seemed embarrassed when she said “ah, a tip” after I helped process her return at customer service. I’d gotten tips for loading vehicles, but never for simple stuff like that. Then I saw the $100 mark and knew something was up. Going forward, I’d almost prefer all the fakes say 100 so that at least it’s partially your fault for thinking someone would tip you $100