Pop Up notes

Pop Up notes

We have a customer who has overdue invoices requiring payment before we can proceed with processing a new sales order.
Is there a Pop Up window notification available that we can be created on a customer record in Books, that will display a message (containing a user-created free type text string) when a Sale Order is saved?

example: PLEASE DONT PROCESS UNTIL THIS CUSTOMER ACCOUNT BALANCE SHOWS ZERO OVERDUE