The transport of individual cargoes, goods and equipment is often linked to multimodal forms of organisation, preparation and execution of transport, which is often linked to a number of factors that may affect individual operations, individual activities, and a number of factors that often lead to damage, disappearance or alteration of the characteristics of individual cargo, goods or equipment. The safety of individual forms of transport and the safety of transport of individual items, goods, cargo and equipment is thus linked to the form of transport (ship, wagon, aircraft, truck), the form of infrastructure (water, rail, air, road), procedures and forms of loading and handling. Often, however, the procedures are different, technologically sophisticated or up-to-date, but may cause a number of undesirable inconveniences. The subject of research is minerals or granulates imported by the customer, in the form of dry quartzite sand and for the production of quality glass for moulding and modelling, by means of multimodal transport from abroad. After many years of business success and satisfied mutual cooperation between the parties, the process has been broken in the given circumstances, causing a series of inconveniences that have consequently been manifested in terms of business, cash flow and, above all, business confidence. In order to correct irregularities, to detect errors or undesirable behaviours by others, the overall procedures had to be checked, the causes identified and an appropriate remedy given. The complexity of the individual procedures was so precise and in the order of questions that it was impossible to find an answer through the records and the accompanying transport documentation, how the granulates were replaced and, consequently, the causes of the damage suffered. Methodological solutions of individual processes had to be found through forensic sciences, which after proper processing and verification showed real causes and deviations in logistical activity. The aim was to determine whether wrong practices had been committed in the context of the service activity, or whether it involved the deliberate disposal of granulates as raw materials or building materials, which could also form the basis for legal proceedings through the validations obtained.