Thank you for contacting SQUARE ENIX support,If you are receiving an error 601, 406, or error 401 when attempting to update your payment method, then there is an issue where the financial institution is declining the authorization attempt. Unfortunately as SQUARE ENIX is not the financial institution, we are not provided with any information as to why the authorization was declined, only that it was. Please confirm that all billing information is entered correctly on the SQUARE ENIX Account in question. Please also note that once an authorization has been rejected, that form of payment cannot be attempted again for a full twenty-four hours, and any further attempts before that time will automatically be rejected. If you would like further information about this specific authorization attempt, please contact your financial institution.Please ensure the personal information listed on the Square Enix account matches the information listed on the credit / debit card. For example, name of the Square Enix account holder must match the name that's listed on the credit / debit card itself. Keep in mind that only certain pieces of personal information on a Square Enix account can be adjusted (street address and email address) after creation.Make sure that the card you're trying to use isn't already being used to pay for another account. Problems may arise if the an attempt is made to use the same card to bill two separate accounts simultaneously. If this is indeed your situation, please wait 24 hours between reactivation attemptsMake sure that your card provider allows $1.00 preauthorization holds. This billing attempt is made in order to make sure that the account is valid for billing. After 1 to 2 business days, these funds will be placed back on the account. If your card issuer does not allow such preauthorization holds, you may want to contact them.If you attempted this method of payment multiple times with a failed result, there is a possibility of a longer block being placed on the account. This block can last 30 days.Thank you for contacting the SQUARE ENIX Support Center.___________For additional assistance with this issue, you can reply to this email directly. For assistance with a new issue, please visit the SQUARE ENIX Support Center at http://support.na.square-enix.com