The requested refund amount exceeds the amount that can be refunded.
This error occurs because either the refund amount you are requesting exceeds the amount that can be refunded or the order was Fulfilled by Amazon and cannot be refunded from within your seller account. The ItemPrice or Principal is the amount the customer paid for a product before shipping and taxes. Common reasons why your requested refund might be rejected include the following:
For example, if a buyer pays AED 20 for a product (not including shipping and taxes), you can refund up to AED 20. If you were to refund AED 15, the buyer's balance is AED 5. Any future refunds cannot exceed that AED 5 balance.
To view the current balance for an order, and to determine if it was fulfilled by Amazon, you can search for the order using the Search Orders feature in Seller Central.
To resolve this error, please resubmit your request with a refund amount that is less than or equal to the buyer's current balance for only merchant-fulfilled orders.