Fraud investigators, or fraud examiners, look into cases of suspected fraud. They can work for a variety of organizations including law enforcement, criminal justice, government agencies, private investigation firms, financial institutions, and insurance companies. The type of investigations varies depending on the field. Job duties may include collecting evidence, researching transactions, interviewing victims and witnesses, and writing reports on investigations. To succeed in a career as a fraud investigator, you need excellent spoken and written communication skills.