term:

Caption

caption n

[Medieval Latin captio act of taking, from Latin capere to take]
: the part of a legal document that states the court, the names of the parties, the docket number, the title of the document, and sometimes the name of the judge

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.