Trade always precedes transport. Klaassen Advocaten advises buyers and sellers that are involved in international and national trade. This advice could be necessary when preparing contracts (how has liability been apportioned and how have payment and transport been arranged?). Often, transactions of this nature are linked to documentary credits in the form of letters of credit. Despite the best intentions of parties, it is still possible that disputes may arise about the type of product supplied or about the quality or quantity of the product supplied. For example, commodities such as edible and perishable products, such as oils, nuts or fruit, or products that are unsuitable for consumption, including crude oil and metals.