External Auditor is an auditor, usually working for an audit firm, that is completely independent of the company it is auditing. External auditors should always be certified by a professional association of accountants, and should be selected by, and report to, the corporation's board of directors. The primary role of external auditors is to express an opinion on whether an entity's financial statements are free of material misstatements. Some people confuse auditors with people who detect fraud but auditors have nothing to do with fraud detection exclusively. Auditors just want to make sure that company's financial statements are true and fair representation of its actual position.