In the series, Death has a list of who is scheduled to die and when. This list is delivered to the head of each group by a shadowy figure (when the delivery is made to Rube's apartment; it is shown that the delivery is made by an actual shadow, with the list of names becoming corporeal only when it is delivered). The head of each group then gives each reaper a non-transferable assignment to collect a particular soul or souls. Completing that assignment is often difficult for the reapers, who receive only the first (and sometimes middle) initial and last name of the person about to die, the location, and estimated time of death (ETD). If a reaper refuses to take a soul at their place of death and the person somehow survives their appointed time, the soul will "wither and die and rot inside" them. If a reaper does not take a soul and the person does die, the soul remains trapped in the body and is subject to extremely traumatic experiences such as witnessing the autopsy of their own body. Deaths can be at least temporarily postponed without risk to the soul's well-being by interfering well in advance of the time of death; thus reapers would not be interfering with the events that lead to the death. However, this may have unintended consequences, such as other people dying because of actions taken by the person who should have died.