Closed PO can still be changed and invoiced

[former_member131691]

We have regular Purchase orders and service purchase orders which are completed. Fully received and fully invoiced, delivery complete and invoice complete.  
In this situation, the business users expect that the system will no longer allow changes to the purchase order, no further goods receipt and no further invoices to be created.
This is not the case, we see the purchase order can be changed and follow on documents can be created against a closed PO. 

Is this an error ?  

[former_member131691 · Accepted solution]

What you should expect after a purchase order has been completely delivered and invoiced:

The Purchase order can still be changed by the user. Additional invoice(s) and credit memos etc, can be created against the fully invoiced Purchase order. It will not be possible to receive further goods against the purchase order in inventory management, but flexibility is also provided there if you maintain Over delivery Tolerances.

So for example the PO Qty is 100 but you allow a 10% Overdelivery Tolerance. In this case after the 100 are received and the PO closed, a user could receive a further 10 against the 'closed' PO. This is the system design.

Also concerning Purchase requisitions. After a Purchase Requisition has been fully converted to a Purchase Order

it can again be referenced and used again. This is also allowed for business flexibility reasons. A user could continue to

reference a 'closed' Purchase Requisition to quickly create another PO with the reference to it, rather than doing the whole process again, PR creation, approval, PO conversion etc. So this flexibility is inbuilt in the procurement process.

These FAQ notes cover these points: Note 1093582 and note 491211