What type of subpoena requires the production of tangible evidence for court?

The type of subpoena that requires the production of tangible evidence for court is known as a subpoena duces tecum. This legal document compels a person or entity to produce documents, records, or physical evidence that may be relevant to a legal proceeding. The term "duces tecum" translates from Latin to "bring with you," reflecting its purpose of requiring the holder of relevant information to provide that information for examination.

In contrast, a subpoena ad testificandum is focused on compelling an individual to testify in court, rather than producing documents or physical evidence. An instanter subpoena is an urgent request for testimony or evidence that is typically required immediately, but it does not inherently require tangible items. A civil injunction is a court order that requires a party to do or refrain from doing specific acts, rather than a request for documents or evidence.

Thus, the subpoena duces tecum is uniquely designed to ensure that relevant physical evidence is brought forth for examination in legal matters, making it the correct answer.