If you HAVEN'T gotten your code today for your account registration/game registration, etc from buying digitally from SE's store.

If you goto their findmyorder thing for Digital River, find your order, it will tell you what you bought. aka. " FINAL FANTASY XIV: A Realm Reborn [PC DOWNLOAD] " Right below that you'll have an " Serial Code. " That code is what they'll email you. It will be in the form of xxxx-xxxx-xxxx-xxxx-xxxx

The unlock code is like a second pre order bonus item code. It comes in the same 6-3-6-3 format.