Here is the example:
Ordered 100 widgets. 100 have been received, but is determined that 2 are defective. Obvious answer here would be to receive 98 to your standard warehouse and receive the other two to a warehouse for defective goods to separate them.
However, you want to alert those doing receipt of invoice that you want to short pay the invoice by two instead of paying the whole thing and waiting for a credit memo from the vendor.
Clearly you can leave memos on the receipt of goods register, but the invoicing personnel aren't necessarily going to be alerted to that fact.
Short of writing some sort of UDS, how are people handling that?