We received a NACK (negative ackowledgment). What now?
If you are still in the test phase the most likely reason is that you sent non-conformant data in the envelope. The error description in the RCTP file will help you to amend it and re-send your file. If you did not receive a RCTP file we were unable to parse the SBDH. Please verify that it is a valid xml file with all mandatory elements.
If you are in production with your PEPPOL Access Point you should check if the receiving Access Point is online or not - please use the PEPPOL AP Monitor. To find out which AP a receiver use, just perform a Participant Lookup.
Depending on the error code(s) you received in the NACK, you should take appropriate action. For a full list of error codes and recommended actions, go here.
Last date of update: 24.09.2018