I was trying to comment on this answer Is this how I tell whether or not I have "third party drivers"? and when I try to tag the user with "@" followed by their username, the rest of my comment posts, but the username and "@" vanishes. What's up with that?

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    You mean the person who posted the answer? There's no need to ping them when they're the only other person who's participated in the post. Commented Jul 16, 2016 at 22:41
  • That makes sense. I just have never seen the system delete their name before. Commented Jul 16, 2016 at 22:42

1 Answer 1


User pings (@USERNAME) in comments get automatically removed if you want to ping the author of the post (question or answer) below which you write your comment, unless that person or other users (not 100% sure about the exact rules) has already commented below their own post.

This is by design to avoid unnecessary @USERNAMEs in comments, as the owner of the post you're commenting will always get notified anyway and it is not needed to indicate a dialogue flow as there is no dialogue before anybody else replied.

See also:

  • Thanks, learning has occurred. Will accept when the timeout ends. Commented Jul 16, 2016 at 22:45

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