Supplier Portal AP invoice -Freight Charges are not matching with PO matched Invoice

Summary

Supplier Portal AP invoice -Freight Charges are not matching with PO matched Invoice

Content

Hi,

We have a Business case,where our suppliers are adding/entering the Freight charges while creating a new invoice(with PO matched option ) in Supplier portal and they 're entering Freight charges($100) which are different from the original PO matched freight lines ($50).

And our AP invoice validation process won't put any holds on newly added Freight charges (which are completely different from our PO matched line details) subsequently the payments are completing -which is reported as an issue - why the Supplier portal modified freight lines are not put on hold -if they're not exactly matching with PO lines-please clarify -Is there any solution available to avoid this issue from AP side/Supplier portal form level?