Common causes and solutions
Incorrect card number, expiration date, security code, or billing address
Please double-check your entry and try again.
Credit limit reached
You may have reached your monthly credit limit. Please check your card issuer’s app or statement to confirm.
Security lock has been applied
Your card issuer may have placed a lock on your card if the transaction was flagged as suspicious. Please contact your card issuer directly.
3D Secure authentication (identity verification) was not completed
If your card supports 3D Secure, an identity verification screen will appear during checkout. Payment cannot proceed until authentication is complete. Please try verifying through your card issuer’s app or the phone number registered with your card.
Browser cache or cookies are causing an issue
Please clear your browser’s cache and cookies, or try again using a different browser or in incognito/private mode.
If the issue persists
ZAIKO is unable to investigate the specific cause of payment errors. Please contact your card issuer directly for further assistance.
You may also use an alternative payment method (another credit card, convenience store payment, etc.).
👉 Available payment methods