Wis. Stat. § 302.06
The sheriff shall deliver to the reception center designated by the department every person convicted in the county and sentenced to the Wisconsin state prisons or to the intensive sanctions program as soon as may be after sentence, together with a copy of the judgment of conviction. The warden or superintendent shall deliver to the sheriff a receipt acknowledging receipt of the person, naming the person, which receipt the sheriff shall file in the office of the clerk who issued the copy of the judgment of conviction. When transporting or delivering the person to any of the Wisconsin state prisons the sheriff shall be accompanied by an adult of the same sex as the person. If the sheriff and the person are of the same sex, this requirement is satisfied and a 3rd person is not required.
Wis. Stat. § 302.06