Here are some examples of the invoices automatically generated by Jomablue. These invoices are not customizable. You company details and the manual payment instructions that appear can be configured under Registration.
This is the invoice issued when a Site visitor completes checkout with a credit card:
When a Site visitor completes checkout via Pay by Invoice, they are issued with this invoice:
Once the invoice is paid, they are re-send the first invoice with an updated Amount Owing and the 'How to Pay' section is removed.