a vague law prohibiting “structuring” was enacted, in which it became illegal to structure transactions to avoid the $10,000 reporting requirement. This little understood law is a favorite tool of law enforcement because few Americans know that depositing or withdrawing a few thousand dollars in cash a few times a year may land them in prison.

a database called the Financial Crimes Enforcement Network (FinCEN) was established to monitor cash transactions in the USA.[1] Banks must submit a report on persons who make a cash transaction of $10,000 or more. Drug lords learned of this, so they limited transactions to less than $10,000. As a result, laws were passed that require banks to also report “suspicious” or multiple cash transactions below $10,000. Since money was often laundered through casinos and money transfer companies like Western Union, they are required to submit reports to FinCEN too.