A Wisconsin Subpoena in a Civil Case — AO 88 is a document issued by a court in the state of Wisconsin that requires a person or business to provide documents or other evidence related to a civil lawsuit. This type of subpoena can be issued for a variety of reasons, such as to obtain documents, to compel a witness to testify, and to obtain records from a third party. There are two types of Wisconsin Subpoena in a Civil Case — AO 88: the SubpoenDuckseCecumum, and the Subpoena Ad Testificandum. The Subpoena Ducks Cecum orders a witness to produce documents or other tangible evidence, such as video or audio recordings, photographs, or emails. The Subpoena Ad Testificandum orders a witness to appear in court and provide testimony.