docs: def forward(self, to):
          """Forward prior transfer to new recipient(s).
  
          :param to: new recipients to a previous transfer.
           Use ``list`` or  comma seperatde ``str`` or ``unicode`` list
          :type to: ``list`` or ``str`` or ``unicode``
          :rtype: ``bool``
  
          """
  
          method, url = get_URL('forward')
  
          payload = {
              'apikey': self.session.cookies.get('apikey'),
              'transferid': self.transfer_id,
              'transferkey': self.transfer_info.get('transferkey'),
              'to': self._parse_recipients(to)
              }
  
          res = getattr(self.session, method)(url, params=payload)
  
          if res.status_code == 200:
              return True
  
          hellraiser(res)