Use this endpoint to refund the split portion of a payment. This reverses the split amount that was distributed to a secondary merchant account.
This endpoint only refunds the split amount, not the entire transaction. To refund the full payment, use both this endpoint and the regular refund endpoint.
Split Only: This endpoint refunds only the split amount. To refund the entire transaction, you must also refund the primary payment separately.
Full Refund Process: For complete refunds of split payments: 1) Refund the split using this endpoint, 2) Refund the primary payment using the regular refund endpoint.