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Question:

What is a synchronous refund? What is asynchronous refund? What is the difference between a synchronous refund and an asynchronous refund?

Answer:

We have synchronous refunds and asynchronous refunds.

For the synchronous refund, once the refund is initiated, the refund result will be returned immediately. Once the refund result shows failure, the merchant needs to operate the synchronous refund again.

For asynchronous refund, Alipay will still accept the refund request when the merchant's pending settlement amount is insufficient. At this time, the refund status is "Waiting". Once the merchant's pending settlement amount is sufficient, the system will automatically perform the refund operation, no need for merchants to operate.

Note: Asynchronous refunds are rotated every 6 hours, and the rotation period is 180 days.

There are two main ways of refunding, refunding through the global backend, or calling the interface to refund.

问题：

什么是同步退款？什么异步退款？同步退款和异步退款的区别是什么？

解答：

退款有同步退款和异步退款之分。

对于同步退款，一旦发起，会即时返回退款结果，一旦退款结果显示失败，商户需要再次操作一次同步退款。

对于异步退款，当出现商户的待结算金额不足，支付宝仍然会接受此退款请求，此时的退款状态为"Waiting"，一旦商户的待结算金额充足，系统会自动执行退款操作，无需商户再去操作。注意：异步退款每隔6小时轮循一次，轮循周期180天。

退款的方式主要有两种，通过global后台退款，或者调用接口退款。