Fake readers put fake readers on top of an otherwise valid card reader and steal card information and PIN numbers. Another scam involves mounting hidden cameras above in order to watch customers enter PINs and key in PINs. See more image galleries for more photos from the field in Detroit, Michigan, on CNN.com’s iReport.com/Heroes.com: Share your photos with us at 8 p.m. ET or click here for more information.com. In the U.S. call the National Crime Prevention Line on 1-800-273-8255.”]
Source: https://www.csoonline.com/article/2124890/telltale-signs-of-atm-skimming.html