I might to remember that it was possible in the past to see all cases that has the same correspondent as a public user (not logged in). I think it was necessary to know only one ticketnumber and then it was possible to see all cases that belongs to the same correspondent.
May be it was only a dream, but I become crazy while try to find this functionality in the user interface.
Please tell me if it was only in my fantasy, or if this function was there in the past, or if it is still there.
And if it is still there: Where can I find it!