The process by which the attendance of a witness is required is by a subpoena. A subpoena is a writ or order directed to a person and requiring the person's attendance at a particular time and place to testify as a witness. The subpoena may also require the person to bring with the person any books, documents, or other things under the person's control that the person is bound by law to produce in evidence.
Mont. Code Ann. § 26-2-101
Subpoena defined
En
Official source: Montana Code Annotated (Montana Legislature). Reproduced from public-domain Montana statutes; confirm against the official source for the current text. Not legal advice.