Recovery of deleted account possible? If so: Under which conditions?

Hello everyone,

since I dont know where to find the answer to this questition or where to ask specifically I figured I'd try here - bare with me if this isnt the right place, please!

So, the current situation is: A friend of mine deleted their account in a... lets say not very clear state of mind, but probably would like to come back (still talking to them about that matter).
Before telling them to "contact someone, maybe?" I wanted to ask if a recovery of an account is possible and would be done at all and if so under which conditions (aka: would it only possible during a limited amount of time?)?

https://support.na.square-enix.com/f...la=1&kid=68226

SE support faq^

Thank you very much! :) Thats what I was looking for!

Seeing the date of this question, and I can't seem to find any way to privately message you.. I wanted to ask if your friend might perhaps be the same person I know who's characters I know of vanished the other day and I haven't been able to get in contact with them at all and I'm worried about them.
Its probably not the same person but I thought I'd ask anyway. Did they have a character on Siren?