A Louisiana Subpoena to Testify at a Deposition in a Civil Action is a court order issued by a court in Louisiana to compel a witness to appear and give testimony in a civil action. This type of subpoena is issued by the court and served upon the witness by a sheriff, process server, or other person authorized by law. The witness is required to appear before the court and answer questions posed by the lawyers involved in the case. There are two types of Louisiana Subpoena to Testify at a Deposition in a Civil Action: a subpoena duces tecum and a subpoena ad testificandum. A subpoena duces tecum requires the witness to bring documents or other tangible evidence to the deposition. A subpoena ad testificandum requires the witness to testify only, without bringing any documents or other tangible evidence. Both types of subpoenas must be personally served on the witness and must include the date, time, and location of the deposition.