In a Black Money scam, the scammer will tricks the victim into believing that they can buy a special chemical from them to 'clean' away the black ink on a large sum of cash. They may provide stories of how the money came about and why they were painted with the black ink, normally to hide from customs or the authority. In the demonstration, they would usually show the potential victims that the chemical works on some real cash. After the victim is convinced, they will then sell them the chemical with a bundle of blank paper smeared with the black ink. It may sound stupid, but there have been cases of people getting cheated in this famous Black Money Scam.