Prevent work order from being posted if only a partial payment is collected (Force the requirement to enter all payments into the Multiple Payments window)

If only a portion of a customer pay amount on a work order has been posted it is possible to post the work order without completing any payment info on the remaining balance. The system does not warn that there is an outstanding balance and it will automatically assume the outstanding balance is paid via the same method as the initial payment. I would like for the system to pop up a warning if there is an outstanding customer pay amount before allowing posting.