IssuePartialRefundRequest ( BaseRequest )
This call is used by the seller to issue a partial refund to the buyer. This call can only be invoked after the buyer accepts the partial refund offer. This call can only be used if the payment method for the order was PayPal.
Call that uses IssuePartialRefundRequest:
The seller enters the amount of the partial refund that is being offered to the buyer. This amount is in the currency used by the listing site. This amount must be identical to the amount offered through the offerPartialRefund call.
See the Field Index to learn which calls use amount.
caseId ( CaseIdType ) 
This container is used to identify a specific Significantly Not As Described case opened by a buyer in the eBay Resolution Center.
See the Field Index to learn which calls use caseId.
This optional field allows the seller to add a comment regarding the partial refund. This comment is intended to be read by the buyer.
See the Field Index to learn which calls use comments.