Case 1.11 New Century Financial Corporation 87
summary, if an auditor discovers one or more material weaknesses in internal control, then he or she
cannot issue an unqualified or “clean” opinion on the given client’s internal controls. So, in a
•“The auditor must communicate, in writing, to management and the audit committee all
material weaknesses identified during the audit.”
•“If the auditor concludes that the oversight of the company’s external financial reporting and
internal control over financial reporting by the company’s audit committee is ineffective, the
auditor must communicate that conclusion in writing to the board of directors.”
4. For audits of SEC registrants, AU Section 342, “Auditing Accounting Estimates,” of the
PCAOB’s Interim Standards is the authoritative source most relevant to this question. Paragraph .04
summarizes the “macro” level responsibilities of auditors regarding client accounting estimates.
“The auditor is responsible for evaluating the reasonableness of accounting estimates made by
management in the context of the financial statements taken as a whole . . . when planning and
performing procedures to evaluate accounting estimates, the auditor should consider, with an
attitude of professional skepticism, both the subjective and objective factors [that were relied on
by management in arriving at those estimates].”
The remaining two sections of AU 342 provide guidance to auditors that is intended to assist
them in “Identifying Circumstances that Require Accounting Estimates” and “Evaluating
Reasonableness [of accounting estimates].” Listed next are specific procedures that AU 342