there is no way to know if the item is a dupe (if that was possible as a user, the game devs would have implemented that function to detect and delete dupes instantly).
all you can do is wait, play and see if it poofs some day as you already know
i wouldnt worry too much about it and rather be happy about the profit. who would as a duper dupe an unid anni anyway if they could dupe sojs instead and
spawn several dclones to spawn several unid annis... it was obviously just a nice / rich person.
This post was edited by OnChair on Feb 18 2019 07:35am