You can call our payment GET API as a fallback mechanism when no asynchronous notification is received.

• The query returns the latest status, but not necessarily the final status.
• You need to check the status field to determine if it is final.
• If not final, wait for the asynchronous notification or query again later.
• All final statuses will trigger asynchronous notifications to your provided webhook.

Environment	IP Address
Normal	8.212.28.186
Disaster Recovery	18.140.151.69

The field length is calculated in bytes under UTF-8 encoding:

Character Type	Bytes
English letters / digits	1 byte each
Chinese, Japanese, Korean	3-4 bytes each

Do not simply count characters to determine length. For example, for a field like goodsName, if it may exceed the limit, you can truncate to "first 30 characters + ...".

Traffic Type	Handling
Normal business traffic	No rate limiting. Resources are reviewed periodically.
Short-term spikes (campaigns)	Auto-scaling enabled. Please inform us in advance.
Malicious requests	Blocked by firewall without affecting normal business.

• URL parameter merchantTransID = the original payment's merchantTransID
• In the request body, merchantTransInfo.merchantTransID = the new Capture/Refund order ID (different from the original payment order ID)

This means the store and its configuration do not support the specified currency. This can only be resolved internally by EVONET. Please contact your integration manager or raise an internal support ticket.

This usually means the specified payment method is not configured for the store.

• Add the reported payment method to the store configuration.
• It is recommended to check store payment method settings whenever this error occurs to avoid repeated issues.

This indicates that the user failed 3DS authentication.

This indicates an unmapped response code from the payment channel. This occurs when a new response code is received that has not yet been mapped in our system.

To investigate this specific issue:

• Check the order details in your platform
• Review the raw channel response via platform message query

This indicates the transaction was rejected due to security reasons. Our risk control system performs dynamic assessment based on multiple factors including:

• Merchant profile
• Transaction scenario
• Payment method
• Transaction amount

There is no fixed limit applicable to all merchants. If you have specific business requirements, please contact your integration manager for further evaluation.

Pass the selected payment method's enum value to the merchantOrderInfo.enabledPaymentMethod field:

JSON

{
  "enabledPaymentMethod": ["Boost"]
}

Payment method names and logos should be displayed on your checkout page. You can download them here: https://developer.evonetonline.com/docs/payment-methods-overview

We do not proactively cancel or expire orders. Status will only be updated when notified by the channel or when queried.

For example, in card payment scenarios requiring 3DS, if the 3DS link is returned but the user does not access or successfully open it, the transaction will remain in Processing status.

You can use the allowAuthentication parameter to control whether 3DS should be performed for an international card transaction.

Value	Behavior
true	3DS will be performed for this transaction.
false	3DS may still be performed based on your merchant 3DS settings (Optional-Authentication or Must Authentication) and real-time risk control judgment.

Sending false does not guarantee that 3DS will be skipped.

This indicates that the payment method does not support refunds. Please check the payment method documentation or contact your integration manager for alternative solutions.

Item	Details
Partial refund limit	No limit - can refund until fully refunded
Refund time limit	System supports up to 365 days; different wallets may have different limits
Processing time	E-wallets: within 24 hours; Bank cards: 3-5 business days
Refund fees	Subject to contract terms

If you agree to refund: Simply reply to the email accepting the refund.

If you disagree: Reply to the original email with your dispute materials. The email attachment typically describes the chargeback details. If no attachment is present, reply to the email and our team will respond.

From the time we submit to the card network:

Card Network	Timeline
Visa	30 days
Mastercard	45 days

If you do not receive a pre-arbitration notice within this period, the dispute is likely successful.