Case 3.4 First Keystone Bank 197
3. The bulk of the audit procedures applied to a financial institution’s ATM operations will
typically involve internal control tests. As is true with internal controls in other areas, auditors will
focus on two dimensions of the effectiveness of ATM-related internal controls: design effectiveness
and operating effectiveness. Since internal controls for ATM operations are increasingly high-tech,
auditors may very likely require the services of an IT expert in reviewing and documenting the
design effectiveness of ATM-related controls. Once the design effectiveness of those controls have
been assessed, then auditors will go about the task of testing their operating effectiveness.
Listed next is a sample of audit procedures that could be applied to a client’s ATM operations:
—Determining whether the client has properly segregated key functional responsibilities for its ATM
operations, such as, separating custodianship and recordkeeping responsibilities.
Obviously, in the First Keystone case a “surprise” cash count of the ATM funds would have
resulted in discovery of the ongoing embezzlement scheme. It is unlikely that observation of the
ATM-related controls would have uncovered the fraud since the employees, no doubt, would have
made sure that the required controls were operational when they were being observed by the
auditors. It is unlikely as well that the other audit procedures listed above would have uncovered the
fraud.