25 February 2011
1) usually in big corporates, external auditor don't perforrm detailed audit of day-to-day transactions and internal controls. mainly internal auditor do it. although these works are liability of external auditor also.
2) external auditor give report in a standard framework. whereas, there is no standard reporting system for internal audit. it depends on company requirement.
3) CARO requires companies to have appropriate internal audit system commensurate to its size. i believe it does not necesarily mean to have an outsider internal auditor. company may have a department of internal audit and internal auditor may be on its payroll.