Sandy Berger & Dan Rather...call your office

"Recently uncovered documents in the British archives reveal dark secrets from World War II. One problem: they are forgeries."

This is an interesting read from "Smithsonian Magazine." The article, indirectly, tells whom 'allegedly' placed forged documents into the British Archives...and the motive seems to have been financial gain on resulting literary works that used those documents to introduce new revelations to the world.

However, the same process could be applied to promote a more nefarious and political motive due to the lack of security and selective prosecution. I would only use the Holocaust as an example and let you fill in the blanks as to who could benefit from such revisionism.