The department of job and family services 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.