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?