From p. 39 of "Oadenol's Codex":
The Ultimate Document
The ultimate document is a foot-long sheet of blank, pearlescent parchment. It's tough to damage, taking two health levels to damage and 4L/4B soak. It can be attuned for 2m. For 6m, the ultimate document becomes whatever document its owner imagines. It is flawless, written perfectly and in excellent calligraphy, with picture-perfect signatures in all the right places.
The artifact has two limits. It cannot duplicate official documents of Yu-Shan, and telling it to sets off warnings in the Celestial Bureaucracy: repeated offenses may trigger censures. The falsified document also remains on the parchment for only one scene--- it is excellent for showing people and fooling them, but letting someone walk off with it is always a mistake. People who do rarely see their Ultimate Document again.
(Insert flavortext about how NamelessCrow came to own it, etc. here.)