Clarification: I mean a person who has actually been dead for a while and suddenly they’re alive again
Something that nobody seems to have touched upon is the fact that many dead people are embalmed.
If you suddenly came alive again after being embalmed, you’d suddenly become dead again.
Also, post-mortem examinations are not uncommon if the cause of death was not clear. Again this might lead to instant re-death.
Finally, if the cause of death /was/ clear (such as trauma), then again, that may likely result in instant re-death.
Life insurance companies would be changing their terms and conditions.
We have examples of people being misidentified as dead, who rise either at the hospital, mortuary, or after.
It is speculated this is one of reasons ‘wakes’ were established, just to make sure the loved one was well and truly dead before committing them to earth.
They would go “Who was elected?” and immediately return to their casket.