Many of my clients are confused by the payment history data in their app. When their invoice lays out in the app it shows a Club Account Payment and the amount of the invoice, whether that amount has been paid, or not. I suggest the app to reflect an unpaid invoice in red and maybe a negative value (-$100) until it is paid. At this time it can turn green and show a positive value ($100). A lot of clients I work with will be past due and have no idea because they see the invoice listed in their Payment History and have no idea that invoice is unpaid.