Drop ship returns

 This is drop ship cycle.

- CompanyA Books Sales Order

- Send PO to Supplier

- Supplier ships to Customer

- Supplier sends ASN

-  CompanyA creates Receipt against PO/ASN

- Creates Sales order issue (Virtual) transaction so qty is issued out to offset above receipt

- Sales Order closes and Invoice sent to Customer

Now Drop ship return cycle

- Customer returns the goods physically to Supplier directly

- ComapnyA creates Credit Only RMA upon information from Customer

- Issues credit note to customer

- Need to issue a debit note to supplier so need to to Return to Vendor. How would I do RTV to generate Debit note when I dont have qty to return? I dont want to manually enter debit note for this transaction. I need RTV to create Debit note.