When your client has paid an Invoice, you'll see the "Paid in Full" notification in the Status column of the Invoices page.
If your client has only paid a deposit or a portion of the bill, you'll see the "Partially Paid" notification in the Status column. (You'll also see a notification on your Dashboard when a client has made a payment!)
If you have set up installments on an Invoice and a client has not yet paid a specific installment in full on its due date, you’ll see “Overdue” listed in the Status column.
An Invoice that has not yet collected a payment will have the “Unpaid” status.