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

[former_member132363]

Here are some SAP resources you may review based on your topic "changed | service purchase orders | invoice | system | purchase orders | purchase order"

2018636 - How to prevent users from creating Purchase Orders for ...

You have changed the status of the supplier ABC to Blocked, however you are still able to enter its ID when creating a purchase order. ... Go to Purchase Requests and Orders work center; Select the common task New Purchase ... Even setting the status of a supplier as Blocked, the system still allows the users to create?...

https://apps.support.sap.com/sap/support/knowledge/public/en/2018636

S/4HANA Cloud - Flexible Workflow for Purchase Order Approval

Jan 21, 2019 ... In SAP S/4 HANA Cloud system there is configuration option ... The workflow approval process for Purchase Order requires ... Now to defined release conditions, run Fiori App - 'Manage Workflows for Purchase Orders'. ... Check Purchase Order and Status will be changed to Purchase Order Released.

https://blogs.sap.com/?p=528

Best Practices for SAP S/4HANA Cloud

Accounting for Incoming Sales Orders - This scope item provides a report of all ... and posts real time revenue and cost adjustment for professional service for fixed price, ... Purchase Order Accruals - This process supports automatic calculation, review, .... payment, which can be used with the help of external billing systems.

https://support.sap.com/en/product/best-practices-s4hana-cloud.html