Check valid billingKey before Payment

[inland totem]

Hello everyone,
I am using the billingKey method to process user payments. For some business reasons, the order is not charged immediately when the user places it (the payment only happens after confirmation from both the user and the delivery person).

I would like to check whether the billingKey is valid for payment right after the user places the order (without actually charging the amount at that time). How should I implement this?

[dense jackal]

⏳ 잠시만 기다려주세요! 곧 답변드리겠습니다

오류 문의일 경우 아래 정보를 미리 전달해주시면, 빠른 답변에 도움이 됩니다.

- 주문번호(orderId) : - 문의 내용 :

(img를 함께 첨부해주시면 도움이됩니다)

* 계약관련 내용은 1544-7772로 문의주세요. * 주말/공휴일에는 답변이 늦을 수 있어요.

[odd jetty]

Before an actual payment is made, we can’t guarantee that a billingKey will be valid for use. To ensure payment certainty, please proceed with prepayment at order placement while clearly disclosing your refund policy, and then refund as needed if the order does not go ahead.