Refund

2025-04-08 07:57

After a transaction is paid successfully, you can issue a refund by using the refund API or APO Global Merchant Portal. The refund handling fee, execution exchange rate, refund period, and whether partial refunds are supported are subject to the agreement between you and the acquirer.

Refund using API

The overall flow of the refund process is as follows:

Figure 1. Refund workflow

Initiate a refund

The following requirements for a refund request must be satisfied when you use the refund API. Otherwise, the corresponding error codes are to be returned by APO:

Refund requirement		Error code
Refund currency	The value of the parameter refundAmount.currency in the refund request needs to be consistent with the value of the parameter paymentAmount.currency used for initiating a payment.	CURRENCY_NOT_SUPPORT
Refund amount	The value of the parameter refundAmount.value in the refund request must be no less than the minimum refund amount (which is usually the same as the minimum payment amount) and no greater than the refundable amount of a payment.	REFUND_AMOUNT_EXCEED
Payment status	For card payment methods: Only captured payments can be refunded. For a payment where a chargeback occurs and the liability is not judged, a refund is not allowed.	ORDER_STATUS_INVALID
Refund period	The refund is allowed only when the refund is issued within the refund period of the corresponding payment method.	REFUND_WINDOW_EXCEED

Table 1. Refund requirements

The key parameters contained in refund requests are listed as follows (For details, see the refund API):

Parameter	Description
refundRequestId	The unique identifier that you assign to a payment.
paymentId	The unique identifier that Antom assigns to the original payment to be refunded.
refundAmount	The refund amount must be no less than the minimum refund amount (which is usually the same as the minimum payment amount) and no greater than the refundable amount of a payment.

Table 2. Key parameters of refund requests

Obtain the refund result

After you initiate a refund request, you can use either of the following three ways to obtain the refund result:

Obtain the refund result by checking the response returned through the refund API.
Call the inquiryRefund API to inquire about the refund status.

Check the refund status through the refund API

After you call the refund API, APO synchronously returns the refund result. The resultStatus parameter in the API response indicates the refund status of this payment. The values of resultStatus are explained as follows:

resultStatus	Explanation
`S`	The refund is successful.
`F`	The refund failed. See the error codes of the refund API for troubleshooting.
`U`	The refund is being processed. you can obtain the final refund result through the inquiryRefund API.

Table 3. Values of resultStatus

Inquire about the refund status

Regardless of the payment method used for a payment, you can call the inquiryRefund API to inquire about the refund status. The refund status is indicated by the refundStatus parameter in the response. The following table explains the possible values of the refundStatus parameter:

refundStatus	Explanation
`SUCCESS`	The refund is successful.
`PROCESSING`	The refund is being processed.
`FAIL`	The refund failed.

Table 4. Values of refundStatus in the inquiryRefund API

Refund in APO Merchant Portal

You can issue a refund on APO Merchant Portal. For more information about how to issue a refund and view the refund result, see Refund transactions on APO Merchant Portal.