The process by which mortality statistics are compiled in the RSA and the potential impact on public health are discussed. The use of the international death certificate is outlined; this is compared with the South African death certificate to illustrate the importance of establishing the chain of events leading to death. The distinction between underlying and direct causes of death in compiling mortality statistics and planning public health intervention is considered. The major part played by medical practitioners in the death certification process is emphasised, and some of the areas in which mortality data could be improved are highlighted.