I am a business to business site, and I have received complaints that the Invoice (AKA Payment Slip) is insufficient for payment.
If you compare it with an invoice from, say Quickbooks, for example, it is missing a number of key pieces of information, such as the name and address of the company. It says "For website:" but that is it.
Might I suggest that then entire text of the invoice be editable like the text of the subscription. This would be a major expansion of the current "Invoice Text" field which is one line and only applies to one part of the invoice (I believe).
For now I have hacked the english file to put my company name and address, but I'm wondering if you can do something better.
TIA