Well, 'documents' are not the alpha and omega.
Papier is geduldig, paper is patient and easily produced. I mean, I can write a book of 500 pages that states that 19 muslims armed with box cutters hi-jacked 4 airplanes and used them as weapons. But that doesn't mean that that happened.
So who produced these Wannsee protokols?
Meet Robert Kempner, a Jewish chap, who had conveniently found the Protokol somewhere between papers.
What do we know about Kempner?
http://www.fpp.co.uk/Germany/Kempner/index.html
Dr Robert M W Kempner was a lawyer in the Weimar-era Prussian Ministry of the Interior, in Berlin. When the Nazis came to office in 1933, he fled abroad, as a Jew; he settled in the United States, and returned in US Army uniform with the victorious Allied troops in 1945 he acted as assistant prosecutor, in charge of rebuttal cases, at the main International Military Tribunal in Nuremberg,
to the evident distaste of chief prosecutor Robert H Jackson, who stated in writing that he had wanted no Jews on his team to avoid the impression the trials were a vengeance crusade.
Kempner made few friends at the main Nuremberg trial, 1945/46. He coerced witnesses like Friedrich Gaus, who testified on the authenticity of the Hitler-Stalin pact, with threats of deportation to Russia; he slipped a note to prosecutors cross-examining the witness Field-Marshal Erhard Milch urging them to investigate Milch's Jewish parentage;
and he allowed the faking of movie and photographic evidence.
Kempner also stole numbers of original documents from the archives, and was Schlegelberger documentalmost certainly responsible for the attempt to conceal from posterity the March 1942 Schlegelberger Document, in which a hard-pressed Adolf Hitler ordered the postponement of the Final Solution of the Jewish Problem until after the war.
Here the authenticity of the document is rejected:
http://www.codoh.com/found/fndwannsee.html
P.S. faking of documents took place recently in the US in order to get the war against Saddam started, see this CNN report:
http://www.cnn.com/2003/US/03/14/sprj.irq.documents/
I am completely unimpressed by this piece of paper called the Wannsee Protokols.