In 2008, DZ BANK introduced a whistleblower system to prevent white-collar crime and protect employees from undue influence. Both employees and third parties may use the system to supply information on a confidential basis.

There are two ombudsmen available to ensure that information can be supplied confidentially:

• Internal ombudsman: This ombudsman is obliged by an agreement under labor law not to disclose the identity of the informant and acts as the interface for the whistleblower.
• External ombudsman: In addition to the internal ombudsman, an attorney is available as an external ombudsman. The attorney's duty to remain silent also guarantees confidentiality.