Supplier-Credit Memo for RMA of Drop-Ship-Order?

Hi all,

we have the following situation (on EBS 12.1.3):

We have a Sales Order with type Drop Shipment. Now product is shipped by supplier and received by customer. So we paid supplier and received payment by customer.

Now Customer sends product back (and do not want replacement but money back). So we processed the RMA flow including receiving in an virtual InventoryOrg until Credit Memo for Customer (cf. Order Management User Guide 12.1, chapter "Drop Ship Return Flow",p. 2-114).

So far so good!

But how do we now create a credit memo for the supplier to get our money from the supplier. Is there an automatically way to do so?