A presumption of death is a legal determination that a person is considered dead despite the absence of direct evidence confirming their death, such as identifiable human remains. Such declarations are generally made when an individual has been missing for an extended period of time and there is no reliable evidence indicating that the person is still alive. In some cases, a presumption of death may also arise after a relatively short period when the circumstances surrounding the disappearance strongly indicate death, such as natural disasters, military combat, shipwrecks, terrorist attacks, or aviation accidents.