How does multiple active service accounts work?

[Norack]

Incorrect. He either needs to create a seperate account for the PS3, or add the PS3 registration code to his main service account (at which point it cannot be used independently (e.g. u cant log on ps3 and PC at the same time)

You can only og in if that account has a registration code for the platform you're playing on. PS3 players wanting to log on the PC will need to have a PC registration code on their account, and vice versa for PC players. If you want to have two seperate accounts when you buy the other platform's version, they will not be able to freely log on to the opposite platform- they'll only be able to play on the platform coresponding to the registration code that was used.

That's how it was intended to be since the beginning, I've heard nothing of it in a long time so unless someone can point out it changing, I don't expect it to change.

^ This.

Think of it this, when you buy FFXIV it comes with a "key" you than need to make a SE account and attach the "key" to the account, there is one for the PC and ps3 version (as well as other versions if SE makes ports for it.)

Once you attach the key to your account look at it like this

Lets say you log into your account, it will go over to the main server and first it might ask
"Does this person have a active FFXIV account" if you do than it will go to the next step

"Does this person have a PC key, if yes than this person can log onto his account from the PC."
"Does this person have a PS3 key, if yes than this person can log onto his account from the ps3."
"This person has a PC and a PS3 key, this person can log onto both the ps3 and PC interchangeably."