Reliability - Sources of evidence
Reliability of audit evidence is influenced through its nature and its source and since it is dependent upon the specific circumstances, we can create some generalizations that:
- Audit evidence is much more reliable whenever it is got from independent sources outside the entity.
- Audit evidence which is generated internally is more reliable whenever the related controls imposed through the entity are effective.
- Audit evidence obtained directly through the auditor as for example, to observation of the application of a control is more reliable rather than audit evidence obtained directly or indirectly or through inference as for example, inquiry concerns the application of a control.
- Audit evidence is much more reliable whenever it exists in documentary form, where paper, other medium or electronic as for example, a contemporaneously written record of a meeting is much more reliable rather than a subsequent oral presentation of the issues discussed.
- Audit evidence provided through original documents is more reliable rather than audit evidence given through photocopies or through facsimiles.