Whistleblowing involves drawing public attention to wrongdoing in order to prevent harm. There are different types of whistleblowing, including internal (within an organization), personal (against an individual), and external (against an organization). Whistleblowers are rarely seen as heroes by coworkers due to doubts about their loyalty and perceptions that they have damaged the organization. For whistleblowing to be morally permissible, the organization's actions must pose serious harm, concerns must first be reported internally, and all internal procedures must be exhausted. For it to be obligatory, there must also be documented evidence and a reasonable chance that going public will create necessary changes. Physical harm poses a higher obligation than only financial harm.