Over the past decades, companies participating in global economical trade have become accustomed to the fact that economical sanctions, although formally remaining an instrument of national or global policy, can have effects far beyond the jurisdiction which has established them. This applies in peculiar to US sanctions. The importance of the dollar, access to the US marketplace and the financial system, as well as the anticipation of applying secondary sanctions, has led to decisions taken in Washington for many years to influence the behaviour of companies without a direct relation with the United States.