Psychic Paper is an item carried frequently by the Doctor in the revival of Doctor Who. The Doctor sometimes uses it as a form of changeable ID, and people see on it what he wants them to see. Using it often goes like this:
Guard: You cannot enter.
Doctor: Oh yes I can! Here are my documents.
Guard: (checks papers) Forgive me, sir, I did not know you were (important person).
Doctor: Alright. Let's go, companion!
Companion: (reads paper as well) Doctor, this says that (something humorous befitting the situation).
It has its limits though: psychic paper does not work on highly intelligent people, psychics and certain kinds of aliens. I think that an item such as this has incredible roleplaying potential in 3.5e, but I haven't been able to find something like this.
The closest that I have found is a wonderous item (I forgot which book it was) that gives a +4 bonus to any Forgercy checks that use it as a component, but of course this doesn't really mimic the psychic paper.
What I am looking for is something that combines Bluff and something like a Will save, or perhaps something like a Sense Motive check. Does an item like that exist, or would it require homebrewing to make the equivalent of psychic paper?
Best Answer
Yes, it does: a Mirror of Suggestion:
The suggestion encoded is "I have a right to be here as a duly appointed representative of your superiors. Tell me who I am."
Or, much the same can be done with a potion of glibness, as in fantasy settings, authority isn't vested in paper, but in recognized people.
Or, barring that, you could be a level 1 binder (on top of whatever else you were, probably factotum/bard) having bound naberius, and just use disguise self to disguise yourself as someone who is appropriate to be there. (I note naberius qua binder rather than a normal spellcaster because a binder can keep this charade up all day at very low levels without excessive resource use.)
Or, barring that, you could be a diplomancer and just cause whomever you speak with to become fanatically aligned with your interests.
Or, barring that, have a piece of paper with "I prepared explosive runes today" written on it. It's the ultimate password.