and if it appears to the satisfaction of the court that said notice has been regularly given, the court shall so find in its order, and such order, when it becomes final, shall be conclusive upon all persons.”
So it has been said that such heirship “decree [is] conclusive against all persons” as the “basis for the decree of distribution which [is] to follow” (Estate of Blythe, 110 Cal. 231, 234 [42 P. 643]); it settles “the rights of all persons claiming as heirs of the decedent, whether or not they are named in the complaint or personally served with summons” (Title & Document Restoration Co. v. Kerrigan, 150 Cal. 289, 307 [88 P. 356, 119 Am.St.Rep. 199, 8 L.R.A.N.S. 682]) and whether or not they were “individually named in [the] notice ...” (Estate of Blythe, supra, 110 Cal. 231, 233; see, also, 11B Cal.Jur. § 1200, p. 671; § 1205, p. 676; § 1208, pp. 680-681.) The decree is not one “in personam in favor of one of the parties against another.” (Edlund v. Superior Court, 209 Cal. 690, 695 [289 P. 841].) Rather, as founded in a specialized proceeding in rem—“not against persons as such, but against or upon the thing or subject matter itself”— the decree, when rendered, “is a solemn declaration of the status of the thing, and ipso facto renders it what the [decree] declares it to be.” (11A Cal.Jur. § 73, p. 135, and cases there cited.) While it may “not be questioned that justice and sound policy require that the estates of decedents be distributed to persons rightfully entitled thereto and that every concern and endeavor of a probate court should be to the accomplishment of that purpose,” that does not mean that a “valid decree” determinative of rights “of distribution . . . when once final, may be disturbed at the behest of any rightful claimant, known or unknown, when the decree was rendered, for it is the well-settled policy of the law to preserve the inviolability of final judgments and decrees of courts of law and equity, and a valid decree of a court of probate partakes of the nature of such judgments.” (Edlund v. Superior Court, supra, 209 Cal. 690, 695.)
Applying these principles to the present case, the record shows an in rem proceeding in which notice, pursuant to the statute, was posted and directed to all persons interested, and in which any person claiming to be an heir of Ira Wise was entitled to appear. Therefore, if Eva Effie Jones was an heir of Ira Wise, then any of her heirs would be persons in