The number of contractors and subcontractors involved in the supply chain for finished goods can be high, and their relationships very complex, particularly when goods are shipped by air or sea. Depending on the scope of the activity (e.g., whether the shipping company is performing transport by land, air, or sea only; whether the company is also a wholesaler; or whether they store the products in their warehouses), and depending on the applicable regulations, these companies may or may not have to comply with GDP regulations. This is probably why you found it difficult to assure that the shipping organizations follow and adhere to GDP.
