International Institute for Trauma and Addiction Professionals
The International Institute for Trauma and Addiction Professionals (IITAP) is one of the most well-known, for-profit organizations that provides training and certification for licensed and interned mental health professionals who want to treat sexual addiction, partner trauma/betrayal, and other compulsive behaviors in their clients. Despite the concept of sexual addiction being contentious in the fields of psychology, medicine, and neuroscience, and was not included in the DSM as of 2017, the need for this type of certification has been demonstrated over several decades.
Source: Wikipedia — International Institute for Trauma and Addiction Professionals (CC BY-SA 4.0)