code: def forwardAttachment(self, attachment_id, thread_id=None):
          
          thread_id, thread_type = self._getThread(thread_id, None)
          data = {
              "attachment_id": attachment_id,
              "recipient_map[{}]".format(generateOfflineThreadingID()): thread_id,
          }
          j = self._post(
              self.req_url.FORWARD_ATTACHMENT, data, fix_request=True, as_json=True
          )
docs: Forwards an attachment
  
          :param attachment_id: Attachment ID to forward
          :param thread_id: User/Group ID to send to. See :ref:`intro_threads`
          :raises: FBchatException if request failed