Lodge at Australia Post on Markis Account or your Australia Post account.
Inform client job has completed.
Optional:
If over 300 recipients, I can extract recipient details to .csv file, append and apply DPID barcodes to group certificates.
Or merge group certificates from database file.
Important Information:
Prior to electronic transmission of data, protect it with a password. Ask me how.
Once supplied, data resides on a internet disconnected, air-gapped file production computer, essentially hack free, and deleted 14 days after job is completed.