The Births and Deaths Acts 1863 to 1996 and regulations made under those Acts set out the manner in which deaths must be registered. The person registering the death, the qualified informant must produce to the registrar a medical certificate of cause of death signed by a registered medical practitioner who treated the deceased within 28 days before the death. Medical certificates of cause of death must be issued on prescribed forms, supplied for this purpose by An tArd-Chláraitheoir. Notes and suggestions supplied with the prescribed forms for the guidance of medical practitioners, explain that a medical certificate of cause of death is essentially: a statement of the disease which was directly responsible for the death and a statement of any antecedent diseases or causes giving rise to the disease or condition directly leading to the death.
Other significant conditions, which unfavourably influenced the course of the morbid process and thus contributed to the fatal outcome, but which were not related to the disease or condition directly causing death, must be entered in Part II of the cause of death section of the certificate.