Changing, Cancelling, and Blocking Purchase Orders
Use
You can change, cancel, and block purchase orders.
Prerequisites
Note the following points:
If you change a PO after it has been sent to the vendor, a
If the goods have already been delivered, then the changes you can make to the PO are limited. For example, you cannot change the quantity to one that is less than the quantity delivered.
If the invoice has been received or the goods have been paid for, and your intended change affects the price, the change will be ineffective.
You can display the PO history for an item to determine whether deliveries have been received or the item has been invoiced.
See also:
Changing a Purchase Order Cancelling a Purchase Order Blocking a Purchase Order