As a former professional for a major investment firm I went through yearly training on money laundering risk to the firm. Some of the warning signs are transfers from LLCs, off shore accounts, shell accounts only used for transfers. Funnily enough the Biden Family made ample use of all of the above. Hunter as well as Jim were labeled as PEPs, Politically Exposed Persons, and subject to SARs, or Suspicious Activity Reports involving wire transfers.