Answer
Even if the individual is part of your immediate family, you can’t change the registered name on an account to someone else. Square Enix will not help in situations involving fraudulent registrations. Requests must be made by the account holder.
Demonstration of Login Issues – Square Enix Account
Problem Registering To Final Fantasy XIV
If you’ve forgotten your SQUARE ENIX ID or password, go to the SQUARE ENIX Account Management System and choose “Forgot your ID or password?” below the “Log In” button. To retrieve your SEID and/or password, follow the on-screen instructions.
If you normally use your email address to log into that site, login as usual (with your email address as the ID). The ID field will be visible at the top of the page’s banner, and it will contain your ID.
If you have forgotten your SQUARE ENIX ID, go to the login page and search for it. You may also try logging in with the email address registered to the SQUARE ENIX ID. The SQUARE ENIX ID should appear at the top of the page after you’ve logged in.
The ID (or email address) field in the SQUARE ENIX Account Management system is sensitive to case. It’s conceivable that after entering a phrase into the virtual keyboard, it capitalized it automatically.
A Square Enix account is a free account that can be used to authenticate in several Square Enix internet services. Besides its current uses, one may link many IDs from existing services to a single Square Enix account and gain access to perks only available to Square Enix account holders.
1) To permanently terminate a SQUARE ENIX account, go to the SQUARE ENIX Account Management System (https://secure.square-enix.com/). 2) Select ‘Account’ under ‘Account Information’. 5) Choose “Cancel SQUARE ENIX Account” from the drop-down menu.
The Square Enix Account Management System is EV SSL certified. If you connect to a valid website, your browser’s address bar will turn green and you’ll see “SQUARE ENIX CO., LTD.” on the right or left side as the website administrator. … Keep your Square Enix ID and password safe!