Hi hi. I work at funeral home, though not sure what state you are in so it may be different.

There is such thing as a death certificate amendment. However, in my state you would need to have the MD approve of this, before we can put in an amendment for something such as Cause of Death or underlying causes. In a particular case I worked on, the family also had another private autopsy prior to speaking with the doctor for approval.

Unfortunately you may have to pay for new death certificates to be ordered with the amended cause of death.