Two issues are presented in this proceeding: [1] Are the petitioners (maternal and paternal grandmothers of two minors whose parents are deceased) affected or interested parties who were entitled to notice of an adoption proceeding brought by the divorced maternal grandfather? [2] Will a prerogative writ lie to arrest judicial enforcement, by contempt, of an adoption proceeding found to be ineffective for want of advance notice to an affected or interested party? We answer both questions in the affirmative.
At the heart of the controversy before us is the adoption status of two minor children orphaned in May 1980 by the death of both parents. Their maternal and paternal grandparents — both divorced at the time— maintained separate homes. It was not until October 1980 that the maternal grandmother, one of the petitioners in this case, instituted in Canadian County the necessary steps for her appointment as guardian. Notice of that proceeding, which went to all other grandparents, advised them of a hearing scheduled for November. Unbeknown to everybody and without any prior notice, the maternal grandfather, David Arter [Grandfather], had previously commenced adoption proceedings in Oklahoma County and had succeeded in securing a final decree on October 28, 1980. He then took custody of both orphans. Learning of the decree, the maternal grandmother attempted to have it vacated. When she failed, she brought an appeal from the adverse order.
During March 1981, the children went for a weekend visit to the home of the paternal grandmother. When they were not returned some seven days later, the grandfather proceeded to enforce by contempt citation his decree-conferred status as an adoptive parent.
In the present proceeding both grandmothers seek a writ prohibiting the respondent-judge from treating the adoption decree as valid and from enforcing it by contempt.
I.
Petitioners’ principal contention is that the Oklahoma County adoption decree is void as to them. They urge that as parties affected by or interested in the proceeding they were entitled to notice under *1278 the Uniform Adoption Act. 1 We do not regard this issue as controlling. Our view is, and we hold, that by the inexorable command of both the state and federal fundamental law notice to these petitioners was indeed their constitutional due.
In the adoption proceeding here under scrutiny the respondent-judge appointed as guardian ad litem for the children a partner of the grandfather’s lawyer. No notice in any form had been given to the other grandparents, although their whereabouts and claims to the children were well known.
The maternal and paternal grandparents- — all kindred within the same degree of consanguinity — standing alone have an equal claim to judicial approval of their quest for the care, custody and education of their orphaned offspring. 2 The maternal grandfather, qua petitioner for adoption, clearly did not occupy a preferred or superi- or status. As between living parents and grandparents adversely claiming rights to a child, either parent, unless unwilling or unfit, is generally entitled to a preference over the grandparents. 3 In contests between maternal and paternal grandparents all these kindred stand on an equal footing. 4 When both parents are either dead or their parental rights have been severed, a grandparent, although not a natural guardian, 5 has standing to claim custody of his offspring. 6 While either natural parent is alive and his parental bond remains judicially unsevered, a grandparent cannot be regarded as an affected or interested party with a right to notice in an adoption proceeding. This is so because the court’s authority to entertain the adoption petition is conferred by the consent of the natural parents or of a surviving parent, if one of them be deceased, whose will (in consenting to an adoption) may not be ordinarily defeated by the opposition from a grandparent who is without some judicially recognized claim. 7 10 O.S.Supp.1974 § 60.5(3).
Since the custodial claims of the petitioners to the orphans rest on a status co-equal with that of the grandfather’s quest for adoption, we hold that under the facts of this case the petitioners were affected or interested parties entitled by the clear and inexorable command of due process to no *1279 tice and to the opportunity to be heard. 8 Denial of notice to them constitutes a violation of rights protected by due process. 9
II.
The petitioners further contend that the respondent-judge is using contempt power to enforce against them a void adoption decree. They argue that a writ of prohibition lies to arrest this attempted application of unauthorized judicial force.
The trial court’s action in attempting to enforce the decree does indeed constitute an assumption of judicial power not granted by law. Prohibition is available to arrest a legally unauthorized action that is subject to our superintending control. 10 The continued exercise of power by the respondent-judge clearly violates the fundamental rights of the petitioners. They are without a legal remedy that is as adequate as that of prohibition. 11
We assume original jurisdiction and issue a writ prohibiting the respondent-judge from treating as effective and enforcing by contempt the adoption decree by which, without prior notice 12 to the petitioners, the divorced maternal grandfather became the adoptive parent of his orphaned offspring.
Notes
. There is no provision in the Act which sets forth to whom notice of a proceeding must be given. The Uniform Adoption Act merely provides that when both parents are dead, consent to a child’s adoption must be procured from the legal guardian or guardian ad litem who “has authority by order of the court appointing him to consent to the adoption.” 10 O.S.Supp.1974 § 60.5(3).
.
Paronto v. Armstrong,
.
Ingles v. Hodges,
Okl.,
.
In re Cox’ Guardianship,
12 N.J.Misc. 536,
.
In re Johnson,
.
Gould v. Smith,
Okl.,
.
Barriner v. Stedman,
Okl.,
. Art. 2 § 7, Okl. Const.; XIVth Amend., U.S. Const.;
Armstrong v. Manzo,
. Application of Tubbs, supra note 8.
.
Powell v. Seay,
Okl.,
. “Due process is violated by the mere act of exercising judicial power upon process not reasonably calculated to apprise the defendant of the pendency of an action.” Bomford v. Socony Mobil Oil Co., supra note 8 at 719.
. In the constitutional sense, notice and opportunity to be heard were the petitioners’ due before the court could proceed to appoint a guardian ad litem and invest him with consent-giving powers. Armstrong v. Manzo, supra note 8.
