Whether issued by the Commission or by the clerk of this Court, or one of his or her deputies, such notices, citations, subpoenas, or other process may be served by certified mail, by a person designated by the Commission or the said clerk, or by the sheriff of the domicile or residence of the person to whom the subpoena or other process is directed, provided that personal service may be made by the sheriff of any parish in which the party to whom the subpoena or other process is directed may be found.
La. R. Sup. Ct. 17