The most basic service. Normal ground shipping without any modifier to speed up the shipping time.
A shipment that the customer sends back to the store / sender
label.formathas to be
package.typehas to be
If you want to send a shipment to a country where a customs declaration is necessary you can specify this the following way. Detailed information about the parameters can be found in our documentation of creating a shipment.
customs_declaration.currencyhas to be