The department of job and family services or the department of children and youth may appoint and commission any competent officer, employee, agency, or person to serve as a special agent, investigator, or representative to perform a designated duty for and in behalf of the department. Specific credentials shall be given by the department to each person so designated, and each credential shall state:
(A) The person's name;
(B) Agency with which such person is connected;
(C) Purpose of appointment;
(D) Date of expiration of appointment, if appropriate;
(E) Such information as the department considers proper.