Shipping Restrictions
Because Amazon is used to fulfill the orders, Amazon takes charge of restricting shipping. Your application or web site, however, should be aware of the shipping restrictions.
To see the latest details on shipping restrictions for each locale, go to http://www.amazon.com/gp/help/customer/display.html?nodeId=468634.
Shipping costs also play an important role in helping your customers purchase items for the lowest possible price. For example, Harry Potter books are available in all locales. A customer in the US could purchase a copy of a Harry Potter book from the UK locale. The shipping charges, however, would be significantly higher than if the same item were purchased through the US locale.
For more information about shipping, go to http://www.amazon.com/gp/help/customer/display.html.