Objector Angela Post appeals from the probate court's order confirming title to the proceeds of decedent Jerome Norman Post's life insurance policy to petitioners Kenneth Post and Eric Post and directing the insurance company to pay the policy's death benefit to them, even though she is named as the policy's primary beneficiary. Because the probate court lacked subject matter jurisdiction over the proceeds of the life insurance policy, the order is void. We therefore reverse.

FACTUAL BACKGROUND AND PROCEDURAL HISTORY

Decedent and objector were married for 32 years. Petitioners are decedent's sons from a prior relationship.

On January 7, 1993, decedent and objector secured a joint term life insurance policy (Policy) through Manhattan National Life Insurance Company (Manhattan National). The Policy names objector as the primary beneficiary, with petitioners named as contingent beneficiaries.

On July 8, 2013, decedent executed a will.

On April 8, 2014, a final judgment of marital dissolution (Judgment) was filed, dissolving decedent's marriage to objector. The Judgment awards decedent full ownership of the Policy.

On May 13, 2016, decedent executed a handwritten codicil (Codicil). In part, the Codicil states that he did not want objector "inheriting anything from [him] under any circumstances by beneficiary designation or otherwise." The Codicil does not specifically reference the Policy.

On May 16, 2016, decedent died. At the time of his death, objector remained as the primary beneficiary of the Policy.

On September 3, 2016, Manhattan National advised Julie Anne Kress, decedent's sister, that there were disputed claims regarding the Policy's benefit proceeds. The letter requested either a court order directing it as to how to make payment, or an agreement made by all parties.

On November 22, 2016, Kress filed a petition for probate of will and for letters testamentary, and for authorization to administer decedent's estate under the Independent Administration of Estates Act ( Prob. Code, § 10400 et seq. ) (Act).

On January 3, 2017, letters with full authority under the Act were granted to Kress.

On May 8, 2017, petitioners petitioned the probate court for an order confirming title to personal property, seeking to be designated as the rightful beneficiaries of the Policy under Probate Code sections 50401 and 9611.2

*665On May 19, 2017, objector filed a response to petitioners' petition. In it, she asserted she and decedent were registered domestic partners from November 24, 2015, until the date of his death. She also asserted the Policy was not a part of decedent's estate and therefore was not subject to this probate proceeding.

On May 26, 2017, petitioners filed a reply to objector's response. They asserted decedent was not in a legal domestic partnership with objector. Along with their reply, they included a declaration from decedent's estate attorney. She reported that she met with decedent on May 13, 2016. He stated that he wanted to confirm and ensure that objector received nothing from him after his death, "either by will, devise, beneficiary designation, or otherwise." He reportedly "was concerned that he may not have proactively retitled all assets, updated beneficiary designations, nor effectively unwound a short lived and immediately regretted attempt to reconcile with [objector]." The attorney assisted him in drafting the Codicil at their meeting, but he died before he could return the following week to execute a more formal version of the document. It was her understanding that, had there been more time, decedent "desired and intended that all beneficiary designations and assets passing outside of his estate be retitled to remove his ex-wife as a beneficiary."

On June 2, 2017, petitioners filed a supplement to their reply.

On June 9, 2017, objector filed a surreply in response to the supplemental reply. She conceded that she had no community property interest in the life insurance proceeds because the couple had not formally registered as domestic partners. She maintained, however, that the Codicil did not override the prior beneficiary designation.

On June 16, 2017, the probate court issued its order naming petitioners as the "proper and rightful beneficiaries" of the Policy's proceeds. This appeal followed.

DISCUSSION

Among other things, objector asserts the Policy is not part of decedent's estate and that, as a result, the probate court had no jurisdiction over the proceeds of the Policy or Manhattan National, and was not authorized to award the insurance proceeds to petitioners. Petitioners concede the Policy proceeds are not part of the probate estate. However, they contend the probate court had jurisdiction to make an equitable determination regarding the Policy's beneficiary designation. They are mistaken.

*666The probate court is a department of the superior court that exercises its jurisdiction in proceedings that concern the administration of a decedent's estate, including proceedings to probate a will and will contests as well as proceedings to determine entitlement to distribution of a decedent's estate and the subsequent distribution thereof. ( Prob. Code, §§ 7050, 8200, 11600, 11700 ; Estate of Bowles (2008) 169 Cal.App.4th 684, 695, 87 Cal.Rptr.3d 122.) "The jurisdiction of the probate court is in rem and the res is the decedent's estate." ( Estate of Kampen (2011) 201 Cal.App.4th 971, 1003, 135 Cal.Rptr.3d 410.) "At any time after a decedent's death, any interested person may commence proceedings for administration of the estate of the decedent" and petition to the probate court for an order for probate of the decedent's will.3 ( Prob. Code, § 8000.)

"While the superior court in this state exercises both equity and probate jurisdiction, still the procedure to be followed in seeking relief within those two jurisdictions is widely varied. And if the probate procedure laid down by the code is followed, then only relief under probate jurisdiction can be granted. In such a case general equity relief cannot be secured." ( In re Estate of Davis (1902) 136 Cal. 590, 597, 69 P. 412.) As the Supreme Court later stated in Estate of Bissinger (1964) 60 Cal.2d 756, 764, 36 Cal.Rptr. 450, 388 P.2d 682 : "The rule is that 'while the superior court, sitting in probate, is a court of general jurisdiction, "the proceedings being statutory in their nature, the court has no other powers than those given by statute and such incidental powers as pertain to it and enable the court to exercise the jurisdiction conferred upon it, and can only determine those questions or matters arising in the estate which it is authorized to do. Thus, in the exercise of the powers conferred upon it, its jurisdiction is limited and special, or limited and statutory." ' "4

Subject matter jurisdiction is the power of the court over a cause of action or to act in a particular way. The lack of subject matter jurisdiction means the entire absence of the power to hear or determine a case, i.e., an absence of authority over the subject matter.5 Where *667the evidence is not in dispute, a determination of subject matter jurisdiction is a legal question subject to de novo review. ( In re Guardianship of Ariana K. (2004) 120 Cal.App.4th 690, 701, 15 Cal.Rptr.3d 817.) In the absence of subject matter jurisdiction, a trial court has no power to hear or determine the case and any judgment or order rendered by a court lacking subject matter jurisdiction is void on its face. ( Varian Medical Systems, Inc. v. Delfino (2005) 35 Cal.4th 180, 196, 25 Cal.Rptr.3d 298, 106 P.3d 958.) A court's lack of subject matter jurisdiction is never waived and can be raised for the first time on appeal.6 ( Parrott v. Mooring Townhomes Assn., Inc. (2003) 112 Cal.App.4th 873, 876, fn. 1, 6 Cal.Rptr.3d 116.)

Apart from $1,000 in personal property, the only asset listed in the probate petition is the proceeds of the insurance policy. Formal probate proceedings were not required for the personal property because that amount can be transferred by affidavit without seeking letters of administration.7 The question thus is whether the jurisdiction of the probate court may be invoked where the only relevant alleged assets of the estate are alleged to be the proceeds of a life insurance policy, the beneficiary of which is not the estate. We conclude it may not.

A probate court has jurisdiction over the property of the estate of the deceased only: "The probate court has general subject matter jurisdiction over the decedent's property and as such, it is empowered to resolve competing claims over the title to and distribution of the decedent's property." ( Estate of Heggstad (1993) 16 Cal.App.4th 943, 952, 20 Cal.Rptr.2d 433.) However, our Supreme Court has held, "In the exercise of its legal and equitable powers [citations], a superior court sitting in probate that has jurisdiction over one aspect of a claim to certain property can determine all aspects of the claim." ( Estate of Baglione (1966) 65 Cal.2d 192, 197, 53 Cal.Rptr. 139, 417 P.2d 683, italics added.)

In the present case, decedent's estate has no interest in the proceeds of the Policy. Decedent merely had the right to designate to whom the Policy's proceeds should be paid after his death. "It is well settled that a beneficiary under an insurance policy takes by virtue of the contract of insurance rather than by the law of succession; that the proceeds do not become a part of the estate of the insured ; and the law of descent and distribution has no applicability to such cases." ( Estate of Welfer (1952) 110 Cal.App.2d 262, 265, 242 P.2d 655, italics added.) Because the probate court had no jurisdiction over the subject matter of the order, the order is void.

" '[A]n act beyond a court's jurisdiction in the fundamental sense is void; it may be set aside at any time and no *668valid rights can accrue thereunder ....' Stated another way, '[s]ubject matter jurisdiction of California courts (i.e., competence of a court to adjudicate a particular civil action) is governed by the state constitution and by statute .... [¶] Unlike personal jurisdiction, subject matter jurisdiction cannot be conferred on a court by consent of the parties, waiver, or estoppel. A judgment rendered by a court that does not have subject matter jurisdiction is void and unenforceable and may be attacked anywhere, directly or collaterally, by parties or by strangers.' " ( Marlow v. Campbell (1992) 7 Cal.App.4th 921, 928, 9 Cal.Rptr.2d 516.)

We need not further address the parties' contentions. "When, as here, there is an appeal from a void judgment, the reviewing court's jurisdiction is limited to reversing the trial court's void acts." ( Griset v. Fair Political Practices Com. (2001) 25 Cal.4th 688, 701, 107 Cal.Rptr.2d 149, 23 P.3d 43.)

DISPOSITION

The order is reversed.

We concur:

Humes, P. J.

Banke, J.