Subpoena Duces Tecum (Latin for: "bring with under penalty of punishment).
In law a subpoena (literally "under punishment") is a court order requiring a persons appearance, also called a "summons." A subpoena duces tecum is a specific form of subpoena requiring that a person bring certain documents or other evidence to the court.
Similar to subpoena ad testificandum (writ of summons to testify) but including clauses to bring in hand books, papers, etc. for the court.