Liability for money laundering through foreign companies

I read news that an investigation into money laundering, embezzlement, and other corrupt practices is ongoing in Spain, and searches were even conducted in various companies, including international ones. What if I cooperate with a foreign company (not necessarily in Spain, but generally), and suddenly Ukrainian or foreign investigators start suspecting financial fraud there? Could I be held liable in Ukraine if my actions were honest or if I didn't even know about the illegal activities of my partners? How should I act in such a situation to protect myself and avoid becoming a subject of such an investigation?