Business Customer receipts

According to our records, you have received 2 order(s) from Amazon Business customers in July for which you have not yet uploaded an invoice.* The [Amazon Business invoicing policy requires you to provide a compliant VAT invoice (or a receipt, if you are not legally obliged to issue a VAT invoice) within one business day after shipment confirmation for orders placed by Amazon Business customers.

Can someone please advise me the easy way to issue a receipt.
Although I’m fairly sure the buyer does not really want one?