Subpoena Duces Tecum
Definition - What does Subpoena Duces Tecum mean?
A subpoena duces tecum is a subpoena that requires a person to show up in court with specific documents. The documents may be the reason why the person is required to be a witness or could be in corroboration to a witness statement.
Justipedia explains Subpoena Duces Tecum
It would be considered a contempt of court for a person who received a subpoena duces tecum to not bring the documents to court. Most likely, the person would be held in jail on contempt until the documents were produced.