Notify supplier if there are Duplicate IDR Invoices or Invoices are sent to IDR without a PO number

Summary:

We are looking for a way to send notifications/emails to the supplier if they send Duplicate IDR Invoices or they send Invoices without a PO number

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):