North Sydney based event company, Human Group, has been implicated in a case of fraud involving a former employee of the National Australia Bank and the payment of corrupt commissions.

NSW Police say investigators have been told of a scheme whereby a person would allegedly receive corrupt commissions to authorise payments by a financial institution of invoices for a contractor which were in excess of the agreed value of the contract.

Strike Force Napthali delegates executed three search warrants at businesses at North Sydney and Milsons Point, and at the home of Human Group owner Helen Rosamond at Potts Point.

Police are alleging the NAB’s former chief-of-staff to CEO, Andrew Thorburn, Rosemary Rogers, obtained kickbacks for approving grossly inflated invoices from Human Group.

Financial Crimes Squad Commander, Detective Superintendent Linda Howlett said detectives are working closely with the financial institution’s investigators to establish exactly what has occurred.

“Our Corporate Corruption Team has been working tirelessly to track payments and other funds to determine if an offence has been committed,” Det Supt Linda Howlett said.

“From the information we have gathered so far, we know there are people who have significant information that may assist us, and we are appealing for them to come forward.

“These investigations are complex and often protracted, but it’s likely even a small piece of valuable information or insight could assist us in resolving the matter swiftly,” Det Supt Linda Howlett said.

NAB CEO Andrew Thorburn this week told staff that NSW Police had informed him of the execution of the search warrants involving a former supplier of the bank.

“This matter has been investigated by us and was reported quickly to the police, and we will continue to fully cooperate with them,” he said.

“The people under investigation no longer work with the bank, or are involved with us. We will not be commenting further while this remains under police investigation.”