Eurojust contributed to the three-year project entitled ‘Prevention and Settlement of Conflicts of Exercise of Jurisdiction in Criminal Law’, led by the University of Luxembourg. In this context, Dr Angelo Marletta also interviewed representatives from the Eurojust National Desks and the Secretary to the European Judicial Network, all of whom volunteered. These interviews took place in February 2015. The report is a summary of the field research, which is based on the interview transcripts. The transcripts should be considered raw material, neither verified nor edited, and not reflecting a Eurojust position. Also to be noted is that the Eurojust document, ‘Guidelines for deciding “Which jurisdiction should prosecute?” ’, which was revised by Eurojust in 2016, after the interviews took place, is not reflected in the report.