At least here, an "authorized" person, medical, etc. has to verify the person is absolutely dead.
I researched a good bit of information on it at one time.
You don't have to have the person embalmed if burial is within a very short period.
If anyone can verify, Jewish people bury their dead within 24 hours so there is no embalming, etc.
Some states require there to be a concrete vault as well as the casket.
@Terri9630 that is just out of the norm from what I learned.
The death has to be verified, I was just talking about the funeral/burial.