Need to justify invoice payment delays

Summary

How to track exchanges between users for delaying invoice payments

Content

Hi,
As part of the audit, we need to justify delays in the payment of supplier invoices. For each invoice selected for the audit, we need to justify the delay by showing the exchanges between the preparer of the requisition, the cost center manager, or the buyer.

We need to be able to have the visibility of an invoice and the PO/requisition in dispute, and to be able to easily upload and download attached documents that are associated to this dispute, and to write BI Publisher reports to access the exchanges.