Jason,
We were wondering the same thing about the invoice number that Authorize.net is showing on the receipt. Looking on Authorize.net we are getting the impression that the invoice number is coming from the site. I know you said that it is better to use a custom receipt, which we will start to use, but for the purpose of matching the information in the database to authorize.net in QuickBooks, is there a way we can save that authorize.net invoice number in the database along with the other information?
Thank You