Internal auditor

read standards on internal audit (SIA) 1 to 16 

The scope of internal audit is very wide. 

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Indepth knowledge of various laws and its applications are required while conducting internal audit. 

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In addition to the above; the internal auditor has to see whether the top management's policies are actually implemented. 

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Internal auditor is a management tool i.e. he has to report to the management but the statutory auditor has access over it to decide the effectiveness of internal controls. 

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Internal auditor helps in achieiving excellence by use of resources available.