Protect your business income with the safescan counterfeit detector pen this handy pen will create a brown or black mark on banknotes that fades if the note is genuine but remains if the note is fake theres no easier or more economical way to make sure your company is protected from fraud pen to detect counterfeit bank notes if ink turns brown or black note is probably a fake saves money and prevents fraud easy and reliable method of checking notes supplied in a pack of 10