After the refund API request is received, usually the status will be "CREATED", but sometimes will be shown as "REFUNDED" due to simultaneous execution of the refund process. Please treat both statuses as successful refunds.
For the "CREATED" status, PayPay will conduct batch refund processes, and will keep retrying until the refund is successful. Therefore the final status will always be "REFUNDED".
ウェブペイメント webpayment キャンセル cancel 返金 refund Refund a Payment status ステータス