The DUH is an environmental and nature conservation association and, at the same time, a recognised consumer protection association that is entitled to bring actions. Just as with the German Tenants' Association, the BUND or the consumer associations, the DUH is included in the list of qualified institutions at the Federal Office of Justice, which checks at regular intervals whether the DUH continues to satisfy the requirements for representing in court the interests of consumers. The Higher Regional Court of Stuttgart most recently examined this question and gave a positive response.
Furthermore, the DUH is also a recognised nature conservation organisation that is entitled to bring actions before the administrative courts. In this context, it brings actions for "clean air", for "clean water" and against the ineffective conditions imposed by the authorities, for example, with regard to official recalls in the "dieselgate" scandal.