There could be a case in which customs duties, other import tax and customs clearance fee might be charged when a purchased product(s) clears the customs in different countries.

In such a case, each customer is due to cover these expenses. When ordered products are delivered to our customers, we ask them to make payments for these expenses directly to the delivery companies or the customs.

Each country has a different policy regarding tax and customs clearance fee. 
We would like to ask our customers to check details with the customs in each country where they'll receive our product(s).