This forum is to discuss different features/issues of Oracle Financials modules ( GL - General Ledger, AP - Accounts Payable, AR - Accounts Receivable, FA - Fixed Assets & CM - Cash Management ).
Switch responsibility to AP & create a Standard Invoice in AP for supplier same as customer with amt. same as refund / payment to customer & use distribution as " AR Refund Clearing' .
Make payment of above Invoice from AP to your customer.