The following auditing standard reflects references to standards before their reorganization. The reorganized auditing standard is available here.
AU Section 390
Consideration of Omitted Procedures After the Report Date
Source: SAS No. 46.
Effective, unless otherwise indicated: October 31, 1983.
This section provides guidance on the considerations and procedures to be applied by an auditor who, subsequent to the date of his report on audited financial statements, concludes that one or more auditing procedures considered necessary at the time of the audit in the circumstances then existing were omitted from his audit of the financial statements, but there is no indication that those financial statements are not fairly presented in conformity with generally accepted accounting principles or with another comprehensive basis of accounting. fn 1 This circumstance should be distinguished from that described in section 561, which applies if an auditor, subsequent to the date of his report on audited financial statements, becomes aware that facts regarding those financial statements may have existed at that date that might have affected his report had he then been aware of them.
Once he has reported on audited financial statements, an auditor has no responsibility to carry out any retrospective review of his work. However, reports and working papers relating to particular engagements may be subjected to post-issuance review in connection with a firm's internal inspection program, fn 2 peer review, or otherwise, and the omission of a necessary auditing procedure may be disclosed.
A variety of conditions might be encountered in which an auditing procedure considered necessary at the time of the audit in the circumstances then existing has been omitted; therefore, the considerations and procedures described herein necessarily are set forth only in general terms. The period of time during which the auditor considers whether this section applies to the circumstances of a particular engagement and then takes the actions, if any, that are required hereunder may be important. Because of legal implications that may be involved in taking the actions contemplated herein, the auditor would be well advised to consult with his attorney when he encounters the circumstances to which this section may apply, and, with the attorney's advice and assistance, determine an appropriate course of action.
When the auditor concludes that an auditing procedure considered necessary at the time of the audit in the circumstances then existing was omitted from his audit of financial statements, he should assess the importance of the omitted procedure to his present ability to support his previously expressed opinion regarding those financial statements taken as a whole. A review of his working papers, discussion of the circumstances with engagement personnel and others, and a re-evaluation of the overall scope of his audit may be helpful in making this assessment. For example, the results of other procedures that were applied may tend to compensate for the one omitted or make its omission less important. Also, subsequent audits may provide audit evidence in support of the previously expressed opinion.
If the auditor concludes that the omission of a procedure considered necessary at the time of the audit in the circumstances then existing impairs his present ability to support his previously expressed opinion regarding the financial statements taken as a whole, and he believes there are persons currently relying, or likely to rely, on his report, he should promptly undertake to apply the omitted procedure or alternative procedures that would provide a satisfactory basis for his opinion.
When as a result of the subsequent application of the omitted procedure or alternative procedures, the auditor becomes aware that facts regarding the financial statements existed at the date of his report that would have affected that report had he been aware of them, he should be guided by the provisions of section 561.05–.09.
If in the circumstances described in paragraph .05, the auditor is unable to apply the previously omitted procedure or alternative procedures, he should consult his attorney to determine an appropriate course of action concerning his responsibilities to his client, regulatory authorities, if any, having jurisdiction over the client, and persons relying, or likely to rely, on his report.
This section is effective as of October 31, 1983.