OfferPartialRefundRequest ( BaseRequest )
This call allows the seller to propose a partial refund solution (including the proposed refund amount) to the buyer. If the buyer accepts the partial refund proposal, then the next step in the flow is for the seller to actually issue the partial refund through the issuePartialRefund call.
Call that uses OfferPartialRefundRequest:
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.
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 supporting comment regarding the partial refund solution. This comment is intended to be read by the buyer.
See the Field Index to learn which calls use comments.