Regarding reporting of fraudulent business practices, not just by merchants but by affiliate or intermediary parties,

following up previous post in this section,

although FTC handles most consumer related frauds,

cases and patterns of business fraud more typically fall under RICO statute

which is discussed in some detail on the FBI's website at

http://www.fbi.gov/hq/cid/orgcrime/s...icostatute.htm

Contacting the Bureau to report suspected violations of U.S. federal law can be handled by by submitting a tip via the FBI Tips and Public Leads form

at https://tips.fbi.gov/

on the Bureau's website.