A growing list we are compiling since 2012 of people who have been investigated OR brought up on charges by the SEC or IIROC (Canada). This will be updated on a regular basis and only includes North American public companies. I personally Avoid these people like the Plague.
An excellent website with a searchable database. "OffshoreAlert provides intelligence on participants in high-value international finance, with an emphasis on high-confidentiality jurisdictions. We specialize in exposing investment fraud while it's in progress and helping victims recover assets". https://www.offshorealert.com/
Protect Yourself: https://www.sec.gov/Protecting-You
Regulatory agencies provide a confidential way to file a formal complaint if you have been the victim of a financial crime, or believe one is being orchestrated. I only listed the two countries as that is where you would find the majority of publicly traded microcap companies. Click on the name for a link to their website.