When viewing an invoice at the bottom of the screen under "Activity Hisitory" it gives a history of it's creation and when it was sent. It needs to be a true activity history of the invoice. That being, when it is initially sent, if it is revised and resent, if a statement is sent, and if reminders are sent. All activity needs to be recorded and available.
If an invoice needs to be followed up with a customer or even sent to a debt collector we have to have the information to prove that we have actively been pursuing the debt. We currently cannot prove anything.