Article 26 of Legislative Decree 81/2008, elaborating on earlier legislation on obligations related to contracts, works and supply agreements, introduced — among other provisions — the requirement for the client employer to promote cooperation and coordination by preparing a single interference risk assessment document (DUVRI). This provision mandates a specific document to be annexed to contracts, serving both a formal purpose (providing objective evidence of the information exchanged and agreements reached between the parties) and, more importantly, a substantive one: ensuring effective management of the primary risk arising from outsourcing — namely, the failure to define adequate measures for managing interferences and the omission of information that is often taken for granted yet proves critical.