code: def resendFaxRN_multi(self, CorpNum, OrgRequestNum, SenderNum, SenderName, Receiver, ReserveDT=None, UserID=None,
                            title=None, RequestNum=None):
          
  
          req = {}
  
          if not OrgRequestNum:
              raise PopbillException(-99999999, "원본 팩스 요청번호가 입력되지 않았습니다")
  
          if SenderNum != "":
              req['snd'] = SenderNum
  
          if SenderName != "":
              req['sndnm'] = SenderName
  
          if ReserveDT != None:
              req['sndDT'] = ReserveDT
  
          if title != None:
              req['title'] = title
  
          if RequestNum != None:
              req['requestNum'] = RequestNum
  
          if Receiver != None:
              req['rcvs'] = []
              if (type(Receiver) is str):
                  Receiver = FaxReceiver(receiveNum=Receiver)
              if (type(Receiver) is FaxReceiver):
                  Receiver = [Receiver]
              for r in Receiver:
                  req['rcvs'].append({"rcv": r.receiveNum, "rcvnm": r.receiveName})
  
          postData = self._stringtify(req)
  
          return self._httppost('/FAX/Resend/' + OrgRequestNum, postData, CorpNum, UserID).receiptNum
docs: 팩스 전송
              args
                  CorpNum : 팝빌회원 사업자번호
                  OrgRequestNum : 원본 팩스 전송시 할당한 전송요청번호
                  SenderNum : 발신자 번호
                  SenderName : 발신자명
                  Receiver : 수신자정보 배열
                  ReserveDT : 예약시간(형식 yyyyMMddHHmmss)
                  UserID : 팝빌회원 아이디
                  title : 팩스제목
                  RequestNum : 전송요청시 할당한 전송요청번호
              return
                  접수번호 (receiptNum)
              raise
                  PopbillException