HN has always worked informally. We don't have 'processes'; it isn't clear that we need them, and the thought of having to set them up makes my soul cry. But anyone who has concerns about fakes, abuses, and the like can always get an answer by emailing hn@ycombinator.com. We appreciate such emails because occasionally they point out actual abuses that we need to take care of!
This is assuming the real one wouldn't have articulated anything unique and contextually valuable. (Unless you've got some sure-fire method to determine which statements are objectively so and that's what's getting confused.)
Copying from other sources. I'm not saying it's fake, just curious about verification as someone claimed so.
For instance, your "vouch", are you an official HN account. How can I tell?