ASIS International (ASIS) Professional Certified Investigator Practice Exam

A subpoena ad testificandum specifically requires an individual to appear in court to provide oral testimony as a witness. This legal document compels the individual to come to a designated court on a specified date to give their account of relevant facts or information concerning a case. The primary purpose of this type of subpoena is to ensure that the testimony of witnesses is available to the court, which can significantly influence the outcome of legal proceedings.

On the other hand, other types of subpoenas, such as a subpoena duces tecum, require the production of documents or evidence rather than testimony. Additionally, the option regarding written statements involves a different process, where statements are prepared in advance rather than given orally in court. Presenting evidence that supports a defense may be a part of court proceedings, but that is not the specific requirement of a subpoena ad testificandum.