Denver International Airport Accounts Receivable Follow-up Report

Outside of Denver International Airport in the evening.

Denver International Airport fully implemented 13 recommendations we made in the original audit report, but five others have yet to be fully implemented or acted upon.

Our follow-up work identified a new airport bank account, which the airport now uses to increase efficiency and decrease daily manual entries. In addition, the airport is developing quarterly variance analyses, reevaluating the classification of receivables, enhancing collection efforts, developing ratio analyses, hiring temporary staff, and reviewing workforce readiness on a regular basis.

However, risks remain regarding the two recommendations that were only partially implemented as well as the three recommendations the airport disagreed with.

Airport staff reconciled some accounts receivable accounts when staff were available. However, although airport management says this activity is a typical recurring process, we found not all old discrepancies were reconciled.

Meanwhile, the airport has an ongoing effort to clean up master customer accounts, but we found personnel have also not completed this effort.

Both of these recommendations were intended to be implemented before the airport reimplemented its PROPworks software system for managing property and revenue. The PROPworks reimplementation project will not be complete until the second quarter of 2022.

In the original audit report, the airport did not agree with requiring customers to include remittance advice when making payments, which delays reconciliations of customer accounts. In addition, it did not agree to implement a method to assess interest and fees on late payments before the PROPworks reimplementation, which has resulted in revenue losses to the airport. Lastly, the airport did not agree to conduct a formal staffing analysis of its accounts receivable team, which can result in continued difficulties managing the team’s workload.

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Auditor's Letter

December 16, 2021

In keeping with generally accepted government auditing standards and Auditor’s Office policy, as authorized by city ordinance, the Audit Services Division has a responsibility to monitor and follow up on audit recommendations to ensure city agencies address audit findings through appropriate corrective action and to aid us in planning future audits.

In our follow-up effort for the “Accounts Receivable” audit report issued in September 2019, we determined Denver International Airport fully implemented almost all the recommendations it agreed to in the original audit report. However, despite the airport’s efforts, auditors determined certain risks associated with the audit team’s initial findings — such as reconciling accounts and collecting interest on past-due invoices — have not been fully mitigated. As a result, the Audit Services Division may revisit these risk areas in future audits to ensure the airport takes appropriate corrective action.

The Highlights page in this report provides background and summary information about the original audit and the completed follow-up effort. Following the Highlights page is a detailed implementation status update for each recommendation. The airport provided updates on the three recommendations it disagreed with, and we include these recommendations in the status update section as a reference.

I would like to express our sincere appreciation to the personnel at Denver International Airport who assisted us throughout the audit and the follow-up process. For any questions, please feel free to contact me at 720-913-5000.

Denver Auditor,

Auditor's Signature
Timothy O'Brien, CPA



Denver Auditor

Denver Auditor´s Office

201 W. Colfax Ave. #705 Denver, CO 80202
Call: 720-913-5000
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