Payment errors may occur for the following reasons:

1. The card limit has been exceeded.
2. Incorrect payment information was entered.
3. The payment session timed out.
4. The required security program is not installed.

If the issue continues after checking the above, please contact your card issuer.
(It would be helpful if you could send us a screenshot of the error screen.)

Yes. In the payment window, select the type of cash receipt you would like and enter the relevant number to issue the receipt.

When you choose bank transfer (virtual account) as your payment method, a virtual account from the selected bank will be issued once your order is completed. You can complete the payment by depositing to the account number sent to you via SMS.
Please note that virtual accounts have a payment deadline. If the payment is not made within the deadline, your order will be canceled.

Yes. As long as the deposit amount matches the application amount, the payment will be confirmed.
A new virtual account is issued for each application, so your payment will be verified based on your account ID once the deposit is made to the issued account.

If duplicate charges appear on your billing statement, please submit your payment details (payment date, amount, card issuer, etc.) through the 1:1 Inquiry board.

You can view your payment history by going to My Classroom > Payment History.

If your card was issued outside of Korea, you can make a payment through a separate payment link. Please contact our customer support center for assistance.

A. When making a payment on our website, the following payment methods are available:

1. Credit Card
2. Real-Time Bank Transfer
3. Virtual Account

If you would like to pay using an overseas card or through a separate payment link, please contact our customer support center.