We have situation where invoice makes it into ERP system and then gets invalidated. However, since invoice already archived in Medius we are unable to correct. This creates a situation where we must use workaround that violates best practices.

This is especially problematic with PO invoices since there is no way to unmatch the receipt so we can match the goods receipt to the corrected invoice.

We also have to add something to invoice number (like trailing A) to avoid duplicate invoice number issue, which is not best practice.

This happens on weekly basis and proves time consuming exception management.