Internal Audit Reports

One of the duties of the County Auditor is to perform internal audits of County departments under the jurisdiction of the DuPage County Board and eight County-wide Elected Officials, in order to identify weaknesses in the control over County resources and to help the departments provide DuPage County taxpayers with better services at lower cost. A report of each audit, detailing the conditions found and the Auditor's recommendations for improvements, is distributed to the management of the department and to the County Board or Elected Official. Many of these reports are available to the public.

The County Auditor recognizes that it is a difficult balance between providing transparency to the public through internal audit reports and providing insight to those interested in exploiting the County's vulnerabilities for their personal benefit. As some audit reports identify internal control weaknesses within County operations, audit reports may not be immediately released to the public until the issues have been addressed.  Additionally, the audit reports listed on this website do not contain attachments and addendums having detailed information regarding County operations or that could disclose personally identifiable information about County employees.  The audit reports which have been released are also available for viewing within the County Auditor's Office during normal business hours.

At the time the County's new financial system was implemented in 2014, the County Auditor initiated an audit tracking system which assigned numbers at the commencement of audit procedures.  In some cases, for a variety of reasons, these audit procedures may not result in an audit report being issued resulting in gaps in the audit numbers noted in the reports.

The following is a list of audit reports released by the DuPage County Auditor since April 2004 in Adobe format. You must have the Adobe Acrobat Reader installed on your computer to view these reports. The Adobe Acrobat Reader is free, and may be obtained from Adobe Systems, Incorporated. You can receive a copy of any audit report issued prior to 2004 by sending an e-mail to auditor@dupageco.org, by calling 630-407-6075, or by writing to:

Office of the DuPage County Auditor
421 North County Farm Road
Wheaton, IL 60187

Audit Reports

• Law Library Fixed Asset Audit; Issued 6/29/15 
• Animal Care and Control Fixed Asset Audit; Issued 4/28/15 
• OHSEM Fixed Asset Audit; Issued 3/31/15 
• Duplicate Invoice Entries Audit; Issued 3/12/15 
• Matching of Erroneous Invoice Entry Audit - DOT; Issued 3/11/15 
• Unmatched and Unpaid Invoice Audit; Issued 3/11/15 
• Payroll Exceptions Audit; Issued 3/5/15 
• ETSB Accounts Payable Audit; Issued 2/27/15 
• Duplicate Invoice Entry Audit - Public Works; Issued 2/25/15 
• Security Division Fixed Asset Audit; Issued 2/24/15 
• County Clerk Fixed Asset Audit; Issued 2/23/15 
• Circuit Court Fixed Asset Audit; Issued 2/23/15 
• Overpayment of Retirement-Related Benefits Audit - County Coroner's Office; Issued 2/18/15 
• Duplicate Invoice Entry Audit - CDBG; Issued 2/18/15 
• Community Services Potential Duplicate Payment Audit; Issued 2/10/15 
• Contract Compliance Audit - Sentinel Technologies; Issued 2/9/15 
• General Fund Duplicate Invoice Entry Audit; Issued 2/5/15 
• Division of Transportation Potential Overpayment Audit; Issued 2/5/15 
  ETSB Accounts Payable Audit; Issued 1/30/15 
• Duplicate Payment Audit; Issued 1/15/15 
• General Fund Capital Account Erroneous Entry Audit; Issued 1/13/15 
• Duplicate Invoice Entries Audit; Issued 1/9/15 
• Community Services Duplicate Invoice Audit; Issued 1/8/15 
• Convalescent Center Erroneous Entries Audit; Issued 1/8/15 
• Convalescent Center Duplicate Invoices Follow-Up Audit; Issued 1/7/15 
• ETSB Accounts Payable Audit; Issued 12/30/14 
• Animal Care and Control Employee Transaction Audit; Issued 12/11/14
• Finance Department Duplicate Invoice Entry; Issued 12/11/14 
• Probation Department Duplicate Invoice Entry Audit; Issued 12/9/14 
• Employee Payroll Transactions Audit; Issued 12/9/14
• Workforce Development Grant Duplicate Payment Audit; Issued 12/8/14 
• ETSB Accounts Payable Audit; Issued 12/4/14 
• Public Works Duplicate Invoice and Journal Entries Audit; Issued 12/4/14 
• ETSB Accounts Payable Audit; Issued 11/20/14 
• Duplicate Invoice Entry Audit; Issued 11/20/14 
• Convalescent Center Duplicate Invoice Entry Audit; Issued 11/20/14 
• Information Technology PO Conversion Audit; Issued 11/19/14 
• DSSA Bank Reconciliation Audit; Issued 11/19/14 
• Convalescent Center Duplicate Invoices Audit; Issued 11/13/14 
• Community Development Block Grant Agreement Audit; Issued 11/12/14 
• Workforce Development Grant Purchase Order Audit; Issued 11/10/14 
• Public Works Expired Commodities Encumbrances Audit; Issued 11/3/14
• Crime Lab Capital Lease Audit; Issued 10/31/14
• ETSB Accounts Payable Audit; Issued 10/28/14
• Probation Department Grant Invoice Audit; Issued 10/23/14
• Probation Department Duplicate Payment Follow-up Audit; Issued 10/23/14 
• Division of Transportation Potential Overpayment Audit; Issued 10/8/14
• ETSB Accounts Payable Audit; Issued 9/25/14
• DSSA Bank Reconciliation Audit; Issued 9/16/14 
• WIA Bank Reconciliation Audit; Issued 9/16/14 
• Public Works Duplicate Invoice Audit; Issued 9/16/14
• Coroner's Office Revenue Audit Follow-Up; Issued 9/15/14
• Rejected Payment - Circuit Court; Issued 9/10/14 
• Stormwater Non-Recorded Purchase Order Audit; Issued 9/4/14
• Probation Department Duplicate Payment Audit; Issued 9/4/14
• ETSB Accounts Payable Audit; Issued 8/26/14 
• Community Services Duplicate Invoice Audit; Issued 8/21/14
• Campus Security Expenditure Audit Follow-Up; Issued 8/19/14
• Community Services Grant Service Agreement Audit; Issued 8/14/14
• Sheriff's Office Expired Encumbrance Audit; Issued 8/14/14
• General Fund Special Account Expired Encumbrance Audit; Issued 8/14/14 
• General Fund Special Account Encumbrance Audit; Issued 8/13/14 
• Public Works Expired Encumbrance Audit; Issued 8/13/14
• Convalescent Center Expired Encumbrance Audit; Issued 8/13/14
• Circuit Court Clerk Expired Encumbrance Audit; Issued 8/13/14 
• Human Resources Department Expired Encumbrance Audit; Issued 8/13/14 
• Coroner's Office Expired Encumbrance Audit; Issued 8/13/14 
• Convalescent Center Expenditure Audit; Issued 8/5/14 
• ETSB Accounts Payable Audit; Issued 7/30/14 
• Campus Security Expenditure Audit; Issued 7/29/14 
• DSSA Bank Reconciliation Audit; Issued 7/25/14 
• WIA Bank Reconciliation Audit; Issued 7/25/14 
• Coroner's Office Revenue Audit; Issued 7/23/14
• DSSA Bank Reconciliation Audit; Issued 7/9/14 
• WIA Bank Reconciliation Audit; Issued 7/9/14 
• ETSB Accounts Payable Audit; Issued 6/25/14 
• Public Works Fixed Assets Audit; Issued 6/17/14 
• ETSB Accounts Payable Audit; Issued 5/28/14 
• WIA Bank Reconciliation Audit; Issued 5/21/14 
• DSSA Bank Reconciliation Audit; Issued 5/21/14 
• Probation Department Rejected Voucher; Issued 5/9/14
• DSSA Bank Reconciliation Audit; Issued 4/24/14 
• ETSB Accounts Payable Audit; Issued 4/22/14 
• WIA Bank Reconciliation Audit; Issued 4/15/14 
• Rejected Payment - Finance Department - Ciber, Inc; Issued 4/9/14 
• ETSB Accounts Payable Audit; Issued 3/26/14 
• Security Division Fixed Assets Audit; Issued 3/10/14 
• Friends of the DuPage Animal Care and Control Foundation; Issued 2/28/14 
• ETSB Accounts Payable Audit; Issued 2/26/14 
• Rejected Payment - County Treasurer; Issued 2/18/14 
• Rejected Payment - County Treasurer; Issued 2/6/14 
• ETSB Accounts Payable Audit; Issued 1/29/14 
• Convalescent Center Fixed Assets Audit; Issued 1/21/14 
• WIA Bank Reconciliation Audit; Issued 1/15/14 
• DSSA Bank Reconciliation Audit; Issued 1/15/14 
• County Coroner Fixed Asset Verification; Issued 10/21/13
• County Recorder Payroll Distribution Audit; Issued 7/12/13
• County Coroner Payroll Distribution Audit; Issued 5/8/13
• Security Division Identification Card Review - Contractors; Issued 4/11/13
• Security Division Identification Card Review - Employees; Issued 4/11/13
• Office of Homeland Security and Emergency Management Fixed Asset Verification; Issued 3/21/13
• Animal Care and Control Limited Scope Audit; Issued 2/27/13
• Emergency Telephone Systems Board Fixed Asset Verification; Issued 2/27/13
• Animal Care and Control Fixed Asset Verification; Issued 11/28/12
• Security Division Fixed Asset Verification; Issued 10/28/12
• Circuit Court Administration Fixed Asset Verification Audit Report; Issued 3/14/12
• Historical Museum Audit Report; Issued 9/15/11
• Accrual Balances Audit Report; Issued 5/11/11
• Sheriff's Office Accrual Balances Internal Control Audit; Issued 4/20/11
• County Board Fixed Asset Verification; Issued 2/16/11
• Human Resources Fixed Asset Verification; Issued 2/8/11
• State's Attorney's Office Fixed Asset Verification; Issued 2/4/11
• Court Automation Audit Report; Issued 10/28/10
• Gift Card Audit Report; Issued 10/28/10
• Law Library Audit Report; Issued 10/28/10
• Construction Service Vendor Audit Report; Issued 10/19/10
• Circuit Court Administrator Fixed Assets Verification Audit Report; Issued 2/11/10
• Public Defender Fixed Assets Verification; Issued 1/11/10
• Individualized Job Training Program Internal Audit ; Issued 1/6/10
• Community Services Fixed Assets Verification; Issued 10/14/09
• Elected Officials 2008 Compensation Audit ; Issued 10/7/09
• Veterans Assistance Program Compliance Audit ; Issued 7/8/09
• Weatherization Program Compliance Audit; Issued 5/26/09
• Water and Wastewater Fixed Asset Verification ; Issued 7/16/07
• Circuit Court Fixed Asset Verification; Issued 12/14/06
• Treasurer's Office Fixed Asset Verification; Issued 12/13/06
• Canteen Correctional Services Contract Audit ; Issued 9/17/04
• Outsourced Printing Services Internal Audit; Issued 7/13/04
• Surplus Real Estate Sales Internal Audit; Issued 4/26/04

If you suspect fraud, waste or abuse, call the Audit Hotline at 630-75-AUDIT (630-752-8348), audithotline@dupageco.org