If you are ordering from any country in Europe (with the exception of the Canary Islands) or from the US, there will be no customs fees.
If you are ordering from the rest of the world, there are some countries that may have customs laws that require the payment of import tax. These might include some Latin American countries, Asia, Philippines, India, United Arab Emirates. This depends entirely on the customs laws of the country of destination, and we suggest getting in touch with your local customs agency and they will be able to provide further information.