Wyo. Stat. § 3-3-203: Additional notice governed by rules of civil procedure.

(a) Notice of the filing of the petition and of the time and place set for the hearing on the petition shall also be served as provided by the Wyoming Rules of Civil Procedure on:

(i) The spouse and children of the absentee;

(ii) The testamentary beneficiaries, if known, and intestate heirs of the absentee; or

(iii) The parents or guardian of the absentee if he is a minor.