I didn't have my login credentials available on a laptop, so I posted an answer as guest using a different mail address than what I used to register at Stack Exchange.

Later I decided to reset my password and wanted to log-in with my account to a different Stack Exchange community. However, instead of a log-in button, a "join this community" button was shown, which redirected to the sign-up page. Logging into a different community did not work either: after reloading, I was again "logged in" as the guest.

Deleting all Stack Exchange cookies finally solved the problem.


Pretty sure that's expected behavior and not a bug. The main use case for a guest account is as a stepping stone to a full account, not a throwaway account for someone that doesn't have their login credentials. And I think the design is also set up to encourage one account across all sites (even though multiple accounts are fine as long as they don't interact with one another).

The cookie is there to help you connect your registered account with things you may have posted as a guest. I'm not sure if there is another way to let people post without logging in and still be able to claim their questions or answers when they do register.

  • In that case I would have hoped for a possibility to merge the guest account into the registered account. – TheEspinosa Sep 14 '18 at 11:40
  • 1
    @TheEspinosa You can - just use the "Contact" link at the bottom of the page and choose "I would like to merge user profiles". You may have to register the guest account, but I'm not sure. – ColleenV Sep 14 '18 at 11:43

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