Refund
XML: RefundInvoice · JSON: POST /invoices/{id}/refund
Initiates a refund for a paid invoice. After the refund, a SendRefundStatusNotification callback arrives with RefundStatus=RefundSuccess (see “Callbacks”).
JSON API v3
Request and response (JSON)
// POST /api/v3/projects/1001/invoices/{invoice_id}/refund
{}
// 200 OK
{
"success": true,
"data": { "invoice_id": "1624505c-...", "status": "Refunding" }
}