Internal audits are often referred to as first-party audits, while external audits can be either second-party or third-party.Consultant auditors, while not working internally, use the standards of the company they are auditing as opposed to a separate set of standards.

When the IRS audits, it usually carries a negative connotation and is seen as evidence of some type of wrongdoing by the taxpayer.Corrective action is action taken to eliminate the causes of an existing nonconformity, defect, or other undesirable situation in order to prevent recurrence (reactive).

System audit, an audit conducted on a management system.Who can perform an audit?