"REFUND"The merchant must refund the customer without any item replacement or return. This offer type is valid in the inquiry phase and occurs when a merchant is willing to refund a specific amount. Buyer acceptance is needed for partial refund offers and dispute is auto closed for full refunds. Include the offer_amount but omit the return_shipping_address parameters from the make offer request.
"REFUND_WITH_RETURN"The customer must return the item to the merchant and then merchant will refund the money. This offer type is valid in the inquiry phase and occurs when a merchant is willing to refund a specific amount and requires the customer to return the item. Include the return_shipping_address parameter and the offer_amount parameter in the make offer request.