You need to include the following information in a Return Receipt:
The condition of the product at an individual quantity basis in the Return Receipt. Some returned products in good condition can be re-sold. When a returned product is in bad condition, Digital River needs to know, based on some fulfiller agreements, so that the product will not be re-sold.
The externalReferenceID. Digital River uses the externalReferenceID received in the Return Receipt to tell you the location of the returned product within your warehouse so you can dispose of or manage the returned product.