In many countries, companies involved in international trade must prepare and submit large volumes of information and documents to governmental authorities to comply with import, export and transit-related regulatory requirements. Often, this information and documentation must be submitted to several different agencies, each with their own specific (manual or automated) systems and paper forms. These extensive requirements, together with their associated compliance costs, can constitute a serious burden to both Governments and the business community and represents a serious barrier to the development of international trade.
One approach to addressing this problem is the establishment of a Single Window federating all relevant government administrations whereby all trade related information and/or documents need only be submitted once at a single entry point. This can enhance the availability and handling of information, expedite and simplify information flows between trade and government and can result in greater harmonization and sharing of the relevant data across governmental systems, bringing meaningful gains to all parties involved in cross-border trade. The use of such a facility can result in the improved efficiency and effectiveness of official controls and can reduce costs for both Governments and traders due to better use of resources.
The Single Window is therefore a practical application of trade facilitation concepts meant to reduce non-tariff trade barriers.
Source: United Nations