The peer review focused on occupational safety and health of posted workers (OSH) in the European Union (EU), an issue that only recently has received some attention. The presentations and discussions during the peer review focused on the legal framework at both the EU level and the national levels. OSH related vulnerabilities of posted workers were systematically analysed and explained, and employer’s role and responsibilities in relation to the OSH of posted workers discussed. As an illustrative example, a case of a work accident of a posted worker from Slovenia was presented. After the Slovenian case, the Italian and German cases were introduced. Discussions during the working groups additionally addressed legal and health care mechanism and practices in case of work-related accidents. Furthermore, ideas and suggestions on measures to prevent or reduce OSH-related vulnerabilities were exchanged.