Your browser is currently set to block JavaScript.

For full functionality of this site it is necessary to enable JavaScript. Here are the instructions how to enable JavaScript in your web browser.

After enabling javascript, please refresh the page to go back to site with full functionality

Would you turn off/on JavaScript?

It's a widely used language that makes the web what it is today, allowing for websites to be more responsive, dynamic, and interactive. Disabling JavaScript takes websites back to a time when they were simple documents without any other features.

What are the advantages of using JavaScript?

Speed. Since JavaScript is an 'interpreted' language, it reduces the time required by other programming languages like Java for compilation. JavaScript is also a client-side script, speeding up the execution of the program as it saves the time required to connect to the server.

banner ad
Experts Logo


A Press Release is one of the most cost-effective tools there is. Build credibility by publicizing your company events, performances, and other newsworthy items. Contact Us to feature your Press Release.
Return to Press Releases List
10/8/2009 12:00:00 AM
Dr. Stephen Castell, CITP, Significant Involvment In Credit Card Fraud Case

Crown Court – Criminal Prosecution for Theft, June 2009. An Expert Report was produced and served on behalf of the Defendant who, when employed by a major retail store chain, allegedly made fraudulent credit card refund transactions to his own credit card using the store's electronic till system. Expert technical investigations revealed that the design of the system was such that it was ‘neutral’ as to whose credit card could be used for such refunds and no system security checks were made nor audit trail produced. It was therefore not possible to prove beyond any reasonable doubt that the Defendant had made such erroneous refunds deliberately, and with criminal intent, rather than by innocent mistake, or even due to a sporadic system malfunction. The findings of this expert investigation were clearly reported by Dr. Castell to the court and (most unusually) were fully accepted by the Prosecution without any need for cross-examination, assisting in achieving a Not Guilty verdict from the Jury.

This case reveals some potentially serious security and integrity issues concerning credit card refund transactions in the retail sector. The store chain in question utilised, without any customisation, a leading 3rd-party credit cardswipe and pinpad authorisation package widely employed in electronic till systems across the whole retail industry.

About Dr. Stephen Castell
Chartered Information Systems Practitioner and A Member of the Expert Witness Institute and Chairman of CASTELL Consulting. He is an internationally acknowledged independent computer expert who has been involved in a wide range of computer litigation over many years. He is a member of the Legal Affairs Committee of the British Computer Society, and a Committee Member, British Computer Society Law Specialist Group.

Contact Dr. Stephen Castell
PO Box 334, Witham, Essex CM8 3LP, UK
Tel: +44 1621 891 776
View Profile on

Featured profiles

Paul Chandler, MAI

Real Estate Appraisal Expert

The Property Sciences Group, Inc.

Lester B.
Lester B. Engel Jr., PE

James A. Brusso, PhD, PE

Engel Metallurgical Ltd.

Jonathan Broyles

Sr. Forensic Examiner

Image And Sound Forensics®­

Follow us

linkedin logo youtube logo rss feed logo