Unfortunately, it's very easy to accidentally delete a bunch of non-spam tickets via the bulk update interface. Restoring these deleted tickets is not straightforward.
Good news: none of the lost tickets were removed from the database.
Bad news: you can't search for deleted tickets.
Finding the lost tickets
If you have a copy of the page before you did the bulk update (perhaps in your browser cache?) then you've got all you need. Otherwise, you'll need to access the database directly to get a list of ticket IDs.First of all, find the user ID of the person who marked of all these tickets as deleted (42 in this example), then issue the following query:
You may want to filter some more using the lastupdated timestamp if you know roughly when the deletion occurred.SELECT id, lastupdated, subject
FROM tickets
WHERE status = 'deleted' AND
lastupdatedby = 42
ORDER BY lastupdated;

