California Code, Probate Code - PROB § 1206

(1) If the estate is an intestate estate, to the heirs named in the petition for letters of administration and to any additional heirs who become known to the person giving the notice prior to the giving of the notice.

(2) If the estate is a testate estate, to the devisees named in the petition for probate of the will and to any additional devisees who become known to the person giving the notice prior to the giving of the notice.