Glance above the bill to find out if you could find some obvious microprinting. Some counterfeiters also have microprinting, but it's blurry and is likely to be in several spots. Social login won't work in incognito and private browsers. Be sure to log in with your username or e-mail to https://socialistener.com/story2360763/details-fiction-and-how-to-identify-counterfeit-bills