While using the Social Security Death Index (SSDI) I encountered the following vague notations cited for one individuals’ Date of Death and Last Residence:
Last Residence: 953 (U.S. Consulate), Canada;
Died: Jan 1984;
To find out more information as to specifically where and when this person died I have used the following two resources:

1A) SOCIAL SECURITY ADMINISTRATION (SSA) GUIDE TO FREEDOM OF INFORMATION ACT (FOIA) available at: http://www.ssa.gov/foia/html/foia_guide.htm ;

1B) SSA FOIA FORM SSA-711 available at:
https://secure.ssa.gov/apps9/eFOIA-FEWeb/internet/main.jsp ;

2) BUREAU OF CONSULAR AFFAIRS, U.S. DEPARTMENT OF STATE
DEATH OF U.S. CITIZENS ABROAD BY NON-NATURAL CAUSES available at:
http://travel.state.gov/law/family_issues/death/death_600.ht... ;