Transport of dangerous goods creates substantial utility to society, but carries a risk to the environment, health and safety. Some of the accidents and incidents occurring during dangerous goods transport can be attributed to poor practices, such as misdeclaration or failure to declare the goods. This pre-study aims to investigate the problem of undeclared and misdeclared dangerous goods transport on container, RoRo and RoPax vessels and to investigate the circumstances and causes that lead to incorrect declaration. For this purpose, this research carried out a literature review and conducted several interviews with main stakeholders in Sweden such as port authorities, port terminals, shipping companies, insurance companies and public institutions. Main results suggest that the existence of different regulations (land transport and sea transport for dangerous goods), can be a risk for managing these goods. Furthermore, it is important to enhance coordination between different actors and increase digitalization to control information flows. This pre-study is coordinated with the longer and larger project Transparent information management and collaboration for improved reliability during transportation of dangerous goods funded by the Swedish Civil Contingencies Agency (MSB).