All court orders heretofore mentioned in this act, unless otherwise provided, may be served as follows:

    (a) By delivery of a true copy thereof to the person to be served; or

    (b) By leaving a true copy thereof at the residence of the person to be served; or

    (c) By mailing a true copy thereof by certified or registered mail to the last known post office address of the person to be served, so far as is known; or

    (d) If service upon any person is impossible by any of the above methods, then by posting a true copy thereof on the property of such person, which is sought to be taken in the proceedings.