A subpoena is "a command to appear at a certain time and place to give testimony upon a certain government matter." The term is from the Middle English suppena and the Latin phrase sub poena meaning "under penalty." The term may also be spelled "subpena." There are two kinds of subpoenas: a subpoena ad testificandum brings people to testify before it; a subpoena duces tecum has evidence (documents, tape recordings, photos, guns, etc.) brought to it. Subpoenas are usually issued by the cler… (More on Subpoena)