What factors can make a whistleblower lose legitimacy?

A whistleblower can lose legitimacy if their motivations are questioned, such as if they stand to gain personally from their disclosures or if they have a history of dishonesty. Additionally, if the information they provide is found to be false or exaggerated, it can undermine their credibility. Engaging in unethical behavior, such as violating confidentiality agreements, can also damage their standing. Public perception and the response of the organization involved can further influence how a whistleblower is viewed.