Whenever an infant or incompetent person has a guardian of his estate residing in this state, personal service upon the guardian of any process, notice or order of the court concerning the estate of a deceased person in which the ward is interested is equivalent to service upon the ward, and it is the duty of the guardian to attend to the interests of the ward in the matter. The guardian may also appear for his ward and waive any process, notice or order to show cause which an adult or a person of sound mind might waive.
W.S. 2-2-312