How to prevent delete of tickets

How to prevent delete of tickets

How do I prevent that a tech deletes tickets? And secondly, where do i find those deleted tickets?

Environment: SD+ ondemand

Assigned roles to tech: SDAssetManager, SDCo-ordinator, SDGuest, SDRemoteControl, SDReport

((we have just started to work with this product so forgive me if the solution is obvious))

                New to ADSelfService Plus?