Oh, it appears that Rudy Giuliani misspoke to the WSJ this morning, about those leaked files. Here, I fixed it. https://www.wsj.com/articles/facebook-twitter-limit-sharing-of-new-york-post-articles-that-biden-disputes-11602736535 Also, let's add a few examples of hack-forge-leak.

March 2014 example of hack-forge-leak, from ACTIVE MEASUREs, p. 354–359. The real hacked emails, of a Ukrainian colonel, are in the "all" folder. Three juicy forgeries are in "more interesting" folder.

Two examples of forged emails slipped into this genuine March 2014 hack (and then leaked).

Surfacing of hacked-and-forged material through a phony Anonymous front account, March 2014

The most stunning historical example of spy-forge-leak (before "hack" was a thing): KGB leaking genuine secret files, stolen in the 1960s, *more than twenty times* for the next dozen years. Here's the full set. Can you spot the forgery? It's a good one https://archive.org/details/1980-kgb-holocaust-again

Another recent example, thanks @kevincollier https://www.vocativ.com/372088/bradley-foundation-hack-clinton-cammpaign-fake-files/index.html