There are several suppliers pitching to newsagents with excellent deals at the moment that sound too good to be true. One newsagent received the stock and no invoice. When they asked for an invoice the request was ignored for a week. Eventually, they received a spreadsheet of the items supplied but no invoice. Further digging revealed the company’ they purchased from is no company. GST has not been paid and the provenance of the goods is not certain.
If a deal sounds too good, it probably is. Always get a tax invoice.