WorkingPoint keeps track of the payments (including credits applied) received on an invoice. You can view the payments and the dates of those payments in the Payments Received area on the invoice.
To view the payments received on an invoice:
Click the Invoices tab to open the Invoices List.
Open the invoice whose payments you want to view by clicking the link in the Invoice column.
Click Payments Received at the top of the invoice.
In the list of payments, move the mouse pointer to the left of the payment and click Edit to view the payment.
How do I apply a credit to an invoice?
How do I edit an applied credit?