Error 601?

[New_Game_Plus]

Whenever I try to make a payment on the mogstation using my debit/credit card, I keep getting this error:

An error has occurred.
Please confirm the status of any relevant options and then try again.
For details, please contact the Square Enix Support Center.
(Error code: 601)

I know there are sufficient funds on the card.

[ManuelBravo]

Hmmm your not using an obsolete browser like Internet Explorer right? Try an alternate browser see if that helps. If not check for updates or try Firefox. Otherwise it could be something with SE.

[New_Game_Plus]

Hmmm your not using an obsolete browser like Internet Explorer right? Try an alternate browser see if that helps.

Nope, I'm using Chrome.

[MistakeNot]

If you google "ffxiv error 601" you will see that it is an old problem going back years, with no obvious solution.
Usually you get that error when your bank (or someone) thinks there might be something fishy with the transaction and therefore blocks it. (Or browser problems, as mentioned.)
Wait a few days before you try it again. If that doesn't help wait a few weeks and try again - that helped me when I ran into this problem recently.

[New_Game_Plus]

If you google "ffxiv error 601" you will see that it is an old problem going back years, with no obvious solution.
Usually you get that error when your bank (or someone) thinks there might be something fishy with the transaction and therefore blocks it. (Or browser problems, as mentioned.)
Wait a few days before you try it again. If that doesn't help wait a few weeks and try again - that helped me when I ran into this problem recently.

I'll try that out. Thanks a bunch!

[Enkidoh]

As mentioned, the 601 error code covers a multitude of sins with no one specific cause (it's just a boilerplate response the Mogstation/SE Account Management System throws up when something is preventing a credit or debit card transaction from going through. The most common (but by no means only) causes are:

Incorrect card details (usually a mistake in the CVC number on the back of the card)
Internet browser blocking a security script from running that checks the card is valid (Firefox with ad block software or the 'Noscript' add on is notorious for this)
Either your bank or the vendor of the card (the credit card company whose logo is on the card, i.e. Mastercard or Visa) is falsely flagging the transaction as possibly fraudulent and blocking the transaction.
If you're in a different country to where your card's account is billed from to the country registered in SE account, the SE Account Management System might be blocking it as possibly fraudulent.

It basically comes down to a process of elimination to discover the root cause of the issue sadly. There was a very big official thread on the subject with a lot of discussion and possible fixes for some of these causes, which can still be found here.

One final possibility, recently I had the 601 error appear myself when I tried to register a new Visa debit card to my SE Account (because the previous debit card I was using to pay my FFXI and FFXIV fees reached it's expiry date), after having had no problems with billing since SE scrapped the stupid ClicknBuy system in 1.0, and the cause was ridiculously simple (and was not SE's fault at all). It was basically my bank's fault. When I activated the card with my bank, the teller forgot to remove a flag on my bank account that said the old card had expired and that a new one needed to be issued (which it already had), but the flag was not removed automatically and thus needed a teller to remove it manually. Hence it was interfering with online transactions, causing the card to show up as invalid.

A quick trip to my bank and after a few key presses from the teller later the issue was fixed, and when I tried registering my card on the SE Account Management System it worked fine. So although I don't think your card has the same issue, it shows that often the problem might be on the bank's end, so you may have to contact your bank directly and see if there is any issues with your card or bank account that might be causing this problem with the SE Account system.