Whistleblower complaints are for obvious reasons typically based on exfiltrated documents. There may be liability against the whistleblower for that, but generally that does not impair the merits of the case against the company (except to the extent the company can use threats of legal action over the documents to keep the whistleblower quiet). And in some cases there are specific legal safeguards for whistleblowers whose complaints are based on confidential documents, especially in the case of public companies: https://www.zuckermanlaw.com/court-rules-whistleblowers-can-...