The way I picture it, the knowledge is given as a necessary part of the resurrection effect. The caster is effectively calling out to the soul, saying something like "Hey dead guy! I'm Bob, a neutral-good priest of Pelor. You can come back to your body now if you want; I opened the door for you."
IMO, the text means to say that the target always knows the identity of the attempting raiser. It feels like that's a necessary part of the spell; in order to make the Raise work, the caster must give the information out. If he isn't willing to tell his true name, alignment, and patron, then he can't bring back the dead.
This probably isn't supported by a strict rules-only interpretation, but to me it seems like what was intended.