"Export goods or services are provided to foreign consumers by domestic producers. Export of commercial quantities of goods normally requires involvement of the Customs authorities in both the country of export and the country of import.
The advent of small trades over the internet such as through Amazon, e-Bay and the like, have largely by-passed the involvement of Customs in many countries due to the low individual values of these trades. Nonetheless these small exports are still subject to legal restrictions applied by the country of export, particularly in respect of strategic export limitations."  (Source: Wikipedia.org)