Send Automatic Notifications Alert to invoice specialist for the invoices raised via ISP.

We a have business requirement whereby we need to automatically send notification to the Accounts Payable Specialist who is supposed to validate the PO Matched Invoices raised from the iSupplier Portal in order to notify them for completing the said action in a timely manner, just as it is systematically done in case of non-PO invoices for the Requestor user.