How do I make a partial payment on an AP invoice?

You would use AP30.3 to schedule multiple/partial payments against the invoice.

How would partial payments work if the vendor is sending multiple invoices and not using the same invoice number? As an example, we have vendors send invoices for 80% and then 20% of the PO, mostly capital invoices. How should AP match these if SC is entering the PO at 100% of the cost. By entering the PO at 80/20 the products would have to be received in twice which is incorrect.

Did you ever get a good solution to this? We've struggled with this exact scenario for years now!