The availability of counterfeit euros in the black market has been a growing concern for authorities and consumers alike. The use of fake euros can result in significant damages to the economy and to individuals that unknowingly accept counterfeit bills. Nevertheless, the demand for counterfeit euros continues to increase, and the supply seems to be readily available through online platforms. In this article, we explore the business of selling counterfeit euros on the internet and the potential consequences of engaging in this illegal activity.