I want to trigger a WF action when a support case is merged. I tried with Delete trigger, but seems WF doesn’t run on merge, even though technically the case is deleted as part of the merge. Any suggestions? Basically I just want to send an email when case is deleted (and certain other conditions are met)

Could you use the old record/current record criteria in a condition maybe? So like old record Id != record id

but nothing gets triggered at all on Merge, so where do I put that check?