ShipmentsCredentials cred = new ShipmentsCredentials(); cred.UserName = "username"; cred.Password = "password"; cred.CultureType = CultureType.English; SearchShipmentsParameter par = new SearchShipmentsParameter(); par.ShipmentsCredentials = cred; par.ShipmentsNo = new string[2]; par.TrackShipmentsNo[0] = "344010500000151"; par.TrackShipmentsNo[1] = "REF1234567"; ShipmentsClient client = new ShipmentsClient(); ShipmentsDetailResponse[] res = client.GetShipmentsDetails(par);