Answer it.
Plugin uses REST API and uses original PayPal.dll 1.8.0.0.
We try to send
object PayPal.Api.ItemList.shipping_address
Our code
var itemList = new ItemList()
{
items = items,
#region shipping address
shipping_address = customer.ShippingAddress == null ? null : new ShippingAddress
{
country_code = GetCountryTwoLetterIsoCode(customer.ShippingAddress),
state = customer.ShippingAddress.StateProvince != null ? customer.ShippingAddress.StateProvince.Abbreviation : null,
city = customer.ShippingAddress.City,
line1 = PreparePayPalValue(customer.ShippingAddress.Address1,100),
line2 = PreparePayPalValue(customer.ShippingAddress.Address2, 100),
phone = PreparePhoneNumber(customer.ShippingAddress.PhoneNumber),
postal_code = (customer.ShippingAddress.ZipPostalCode??"").Trim(),
recipient_name = string.Format("{0} {1}", customer.ShippingAddress.FirstName, customer.ShippingAddress.LastName)
}
#endregion
};