My friend, my sister, I received an email from a man offering me a job. It consisted of receiving money from his tenants, on my own account, to transfer it to his “architect”. It is my duty to inform you about money laundering because it can be used without the victim being aware of it. In such a case, a person allows “dirty” money to be “laundered” by entering the legal banking and financial system. The goal is to delete any evidence of where the money came from in the first place.
If you want to learn deeper about money laundering and how it is prevented in the EU for example, I recommend reading the first pages of the DIRECTIVE (EU) 2015/849 of 20 May 2015 on the prevention of the use of the financial system for the purposes of money laundering or terrorist financing.