Sd returns Customer Does Not Send the Goods Back

-If the customer wants a replacement product, you create a free of charge subsequent delivery with ref to sales order
-If the customer wants a refund, you enter a credit memo request, with ref to the sales order or invoice.
-VA01: credit memo request (G2) or free of charge subsequent delivery (SDF) with ref to sales order. For SDF there will be delivery, picking, goods issue.
-VF01: invoice