There are no fees and no paperwork to receive items up to USD800 in the US from abroad. https://www.cbp.gov/trade/basic-import-export/internet-purchases And even if the value is higher than that, CBP does not worry much about duty fees which in most cases are minimal anyway but they care about what the item is and if it complies with regulations. A simple leather watch strap may cause a a package to be inspected and cause much further complications.