Fully automatic counterfeit detector combines optical image analysis and magnetic ink, metal thread and IR mark detection for a formidable barrier to fraud. It does not require users to have bill authentication knowledge. Detection features include UV and MG (magnetic and infrared security marks). High-resolution LCD screen displays each denomination total and grand total. Small size allows it to fit almost anywhere. Detector accurately recognizes denominations and authenticates bills in less than one second. Exterior is made of sturdy plastic.