That's not at all what I said. When he gets a message saying, "that's our document, take it down", that's proof that it's legitimate (not a forgery).
What I'm trying to say though is that he's using volume to expand that. The US could be saying, "those 5 documents are ours, take them down" but since it applied to 500k+, then the shadow of the five casts legitimacy to the whole bunch.