In this paper, the author analyses a few examples of fraud in life and accident insurance. The cases that are the subject of this Article can be classified as "heavy frauds" according to the seriousness of the crime committed and as "external" according to the source type. The course and epilogue of the trials show how important it is to have the closest possible coordination between the judicial, police and insurance institutions and that the character of insurance frauds is becoming increasingly international, requiring stronger cross-border inter-institutional cooperation. Also, experts from a growing number of disciplines (from medicine, through mechanical engineering to technological sciences) do have a particularly notable role in discovering false insurance claims. Their expertise findings can make a decisive contribution to clarifying the circumstances of each and every case. The examples presented in this Article illustrate that closer cooperation between all the named participants and the use of advanced methods and technologies are the indispensable tool of a good and a more efficient fight against the insurance fraud.