I'm new to this awesome site! There is a popular saying that, in a conversation, one is sarcastically telling someone they know everything about another that begins with I know "your rank, serial number and ?" I cant remember what the third descriptive word is. Can you help? It comes from the military.
I believe you are looking for "Name, rank and serial number"
About Convention III: One of the treaties created during the 1949 Convention, this defined what a Prisoner of War was, and accorded them proper and humane treatment as specified by the first Convention. Specifically, it required POWs to give only their name, rank, and serial number to their captors. Nations party to the Convention may not use torture to extract information from POWs.