Since 2023 the International Standard ISO/TS 37008 exists.
Thanks in part to the influence of BuDEG members and DIN SPEC 33452, an international guideline for internal investigations was developed for the first time.
ISO/TS 37008:2023 is a technical standard developed by the International Organisation for Standardisation (ISO) to provide guidelines and recommendations for internal investigations in organisations. This ISO is a document on compliance issues and provides standards for internal investigations.