Since the 1970s, the US has required certain banks and other financial institutions to report cash transactions of more than $10,000 under the Bank Secrecy Act (contained in Title 31 of the United States Code). In 1984, Congress enacted Section 6050I of the US Internal Revenue Code (contained in Title 26) to require reporting by any taxpayer who, in the course of a trade or business, receives more than $10,000 in cash in one or…