deadman's trigger

Most recently coined by the post-apocalpytic cybernetic dystopian future of the videogame series "Shadowrun". A deadman's trigger is essential a delayed automated message which can be sent via text or email after the initial user's death usually with urgency.You may have also seen a similar phenomenon in old cowboy movies. Today it is possible to send such text or messages through third party software or tech savy people.

Person 1: I just received a video message of my parents will through my "email"
Person 2: "Arn't they rock climbing in a remote area? Sounds like a "deadman's trigger."
Person 1:" Oh no they must have just died!"