It is a legal requirement in Ireland that every death that takes place in the State must be recorded and registered. Records of deaths in Ireland are held in the General Register Office, which is the central civil repository for records relating to Births, Marriages and Deaths in Ireland. You can apply for a copy of a death certificate in any Registrar of Births, Marriages and Death or to the General Register Office.
A post mortem (sometimes called an autopsy) is an examination carried out by a pathologist after a death where is necessary to establish the medical cause of death. The majority of deaths do not require any post mortem because the medical cause of death can be certified by a doctor who has been treating the Deceased in the months prior to the death, i.e. a GP or hospital doctor.