Yes, dead balls on sure. It happened to me twice, but many years ago. I learned my lesson the hard way.
Whether or not you knew or did not know, if you accepted money from someone under certain circumstances, the law can take it all back. It pays to know who your customers are and how they do business. Why do you think there are so many agencies to help you find out about everyone ?? Chamber of Commerce, Better Business Bureau, D&B and so many others. The first one for me was back in the early 90's and what happens is, people will try to do business and hide their money by buying things or investing it. The law has no idea if you are involved with the cover-up or not..... and they don't give a sh!t, unless you squawk. Then, it will get bad for you too, regardless of how innocent you are.