Conn. Gen. Stat. § 54-97: Mittimus required for commitment to correctional facility.

No person may be committed to a correctional institution or a community correctional center without a mittimus signed by the judge or clerk of the court which committed such person or, with respect to a person sentenced to a period of special parole, signed by the chairperson of the Board of Pardons and Paroles, declaring the cause of commitment and requiring the warden or Community Correctional Center Administrator to receive and keep such person in the correctional institution or the community correctional center, as the case may be, for the period fixed by the judgment of said court or said board or until such person is legally discharged; and such mittimus shall be sufficient authority to the officer to commit such person, and to the warden or Community Correctional Center Administrator to receive and hold such person in custody, except that any community correctional center may receive any person as provided in section 7-135 without such mittimus.