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This question already has an answer here:

I recently came across this answer and found that the user has been deleted:

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Generally, the deleted users will be displayed like this:

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Why does that alone has a different view? A deleted user without a user id / name?

marked as duplicate by hichris123, Community Jun 2 '16 at 14:36

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • Huh, was it always like that and I just didn't notice (delete voter here), or did it change when it was deleted? – Alexander O'Mara Jun 2 '16 at 13:43
  • It's also possible that the user's display name was blank, ie. perhaps they used some zero-width space or weired unicode characters. – JonasCz Jun 2 '16 at 13:50
  • @JonasCz The HTML element for the user name is also missing, so that's probably not the issue here. – Alexander O'Mara Jun 2 '16 at 13:51
  • Okay yes... That solved it. – Praveen Kumar Purushothaman Jun 2 '16 at 14:37
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I am not exactly sure, but this may be a possibility:

The post is from 2008. In those early days, a lot of work had to be done on the system. Maybe, at the time the user was deleted, there wasn't an automated process to purge or reset display names of deleted users. Jeff said the user himself had to change his display name before a user should request deletion. Maybe the user name and all his information has just been reset / purged from the database.

It is also possible the user had some invisible characters as his display name.

  • But despite of the post being so old, the post was deleted just few mins ago... – Praveen Kumar Purushothaman Jun 2 '16 at 13:56
  • Yeah, sorry. Maybe the user has been deleted before. – Patrick Hofman Jun 2 '16 at 14:01
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    Not only for old posts (well, not very old), see my answer. :) – Shadow Wizard Jun 2 '16 at 14:04
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This happens when both OwnerUserId and OwnerDisplayName fields are null in the Posts table.

There are currently 2313 such posts on Stack Overflow, as can be seen in this query.

As you can see, it's not only for very old posts, latest one being from 2011.

Can't know the reason how both fields are null, just stating the facts which explain this outcome, and hopefully this will help the team find the root cause and fix it. (e.g. applying the ID back)

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