By virtue of Special provision in various Law in India, Revenue Departments and CAG India call for special Audit under the privision of the Law, wherein they suspect and feel special purpose audit is required to trace tax evasion, save revenue and fraudulent transactions. 

• Special Audit under GST
• Special Audit under Service Tax
• Special Audit Under Central Excise and Custom
• Special Audit under VAT/Sales Tax
• Special Audit U's 142(2A) of Income Tax Act
• Special Audit of companies under direction of CAG

In some cases, Department Compulsorily conduct Audit from their Empenelled list of Auditors based on business turnver and other factors.