A study of data collected on 300 suicides occuring in San Diago County between Nov. 1981 & June 1983 suggests the possibility that, in about one-half of suicide cases, the deceased commited suicide on a date prior to that indicated on the death certificate. (note: this is a summary of a presentation to the 17th Annual Meeting of the AAS, May 2-5, 1984.)(NBB)