delivered the opinion of the Court, in which all Justices join.
In this case we determine whether an insured provided notice of a suit filed against her to her insurance carrier, thereby binding the carrier by the resulting judgment. The trial court granted summary judgment in favor of the insurer, and the court of appeals affirmed.
I.
On December 5,1986, Tammy D. Hubbard and Erie Christopher Leatherman were in an automobile accident. The collision killed Hubbard and seriously injured Leatherman. Hubbard was insured by State Farm Mutual Automobile Insurance Company under her mother’s automobile liability insurance policy-
On December 2, 1988, Leatherman and his father, E.L. Leatherman, filed suit against “Tammy D. Hubbard, Deceased.” The Leathermans’ original petition stated that Hubbard’s estate could be served with process by serving the temporary administrator of her estate, although it did not provide a temporary administrator’s name or address. On the same day, John Groce, the Leather-mans’ attorney, filed an application for the appointment of a temporary administrator of Hubbard’s estate in probate court. The probate court appointed Valerie Harwell, a legal secretary in Groce’s law office, temporary administrator of Hubbard’s estate. 1 The Leathermans served Harwell with citation of the suit on January 9, 1989. However, Har-well had not yet qualified as administrator because she had not posted the $13,000 bond required by the order of appointment or received her letters of temporary administration.
In July 1989, Groce sent a letter to State Farm informing it of the Leathermans’ suit against Hubbard’s estate. Groce enclosed a copy of the petition, the police report of the accident, and a notice of default and intent to dismiss for want of prosecution from the coordinator of the court in which the Leath-ermans filed suit. Groce advised State Farm to file an answer to avoid a default judgment against Hubbard’s estate. He did not inform State Farm that Harwell had been appointed temporary administrator or that she had been served with notice of the suit. The only mention of Harwell was a notation at the end of the letter which stated: “cc: Ms. Valerie Harwell, Temporary Administrator.”
Two months after Groce sent the letter, he called C. Victor Anderson, Jr., State Farm’s attorney. Groce advised Anderson that Har-well soon would be named the permanent administrator of Hubbard’s estate. Groce indicated that after Harwell was named permanent administrator, he would amend the Leathermans’ petition, re-serve Harwell, and proceed to trial. According to Groce, Anderson responded that the statute of limitations had run and that State Farm would not defend Hubbard. Anderson maintains he told Groce that State Farm would discuss the lawsuit with him when Harwell received proper service and forwarded all papers pertaining to the suit to State Farm. He denies telling Groce that State Farm refused to undertake Hubbard’s defense. In November 1989, Harwell qualified as administrator of Hubbard’s estate. On March 15,1990, Groce filed the Leathermans’ first amended petition, again naming “Tammy D. Hubbard, Deceased” as the defendant. The amended petition did not name Harwell or Hubbard’s estate as a party to the suit. The petition recited, however, that Hubbard’s estate could be served through Harwell, the permanent administrator of Hubbard’s estate. Harwell did not send a copy of the amended petition or any other papers pertaining to the suit to State Farm.
In March 1990, Harwell filed a waiver of citation and a general denial on behalf of Hubbard’s estate. The trial court issued a notice setting the case for trial in August 1991. Harwell did not send a copy of the notice to State Farm. Although Harwell appeared pro se at the trial, she offered no evidence or arguments in defense of Hubbard. On September 20,1991, the trial court rendered judgment for $74,679 in damages and prejudgment interest, plus court costs and postjudgment interest, against “Tammy D. Hubbard, Deceased.” Harwell did not *173 notify State Farm of the judgment. However, on October 21, 1991, one day after the expiration of the time to file a motion for new trial or perfect an appeal, Groce sent a second letter to State Farm, enclosing a copy of the judgment and seeking its enforcement against Hubbard’s policy. State Farm subsequently commenced this action against Harwell and the Leathermans, seeking a declaratory judgment that it was not responsible under the policy for the judgment against Hubbard.
State Farm moved for summary judgment on two grounds. First, State Farm claimed that Harwell’s failure to promptly forward notice or legal papers related to the suit prejudiced it as a matter of law. Second, State Farm alleged that the judgment was void because it did not name Harwell, a necessary party to the suit. The trial court granted State Farm’s motion for summary judgment. The court of appeals affirmed, with one justice dissenting. It held that State Farm was not liable for the judgment against Hubbard because Harwell’s failure to comply with the notice of suit provision of the policy prejudiced State Farm’s defense of the case as a matter of law.
A movant establishes its entitlement to summary judgment by conclusively proving all essential elements of its cause of action as a matter of law.
City of Houston v. Clear Creek Basin Auth.,
Because the trial court granted State Farm’s motion without specifying the grounds, the summary judgment will be upheld if either of the theories advanced by State Farm are meritorious.
State Farm Fire & Casualty Co. v. S.S. & G.W.,
II.
Harwell argues that Groce’s July 1989 letter to State Farm and his subsequent telephone conversation with Anderson provided notice to State Farm of the Leathermans’ suit against Hubbard, and that even if these communications were not notice, she raised a fact issue whether State Farm was prejudiced by her failure to provide notice. Har-well further contends that State Farm’s refusal to defend the suit estops it from claiming that her alleged breach of the policy’s notice of suit provision relieved it of liability. We disagree.
The notice of suit provision of Hubbard’s policy provided in pertinent part:
We must be notified promptly of how, when and where the accident or loss happened. Notice should also include the names and addresses of any injured persons and of any witnesses. If we show that your failure to provide notice prejudices our defense, there is no liability coverage under the policy. A person seeking coverage must:
1. Cooperate with us in the investigation, settlement or defense of any claim or suit.
2. Promptly send us copies of any notices or legal papers received in connection with the accident or loss.
One of the purposes of a notice of suit provision in an insurance policy is to notify the insurer that the insured has been served with process and that the insurer is expected to defend the suit.
Weaver v. Hartford Acc. & Indem. Co.,
Until State Farm received notice of the suit, it had no duty to undertake Hubbard’s defense. Groce’s July 1989 letter and his conversation with Anderson did not notify State Farm of the suit against Hubbard. At the time of Groce’s communications with State Farm, Harwell was not named as a defendant to the Leathermans’ suit, nor was she ever made a party. In addition, she had not qualified as the estate’s administrator, and the Leathermans’ service of process on her prior to the time she qualified was not valid service on Hubbard’s estate. Any notice Groce gave State Farm before Harwell qualified as administrator was merely notice of a claim against Hubbard’s estate, which “does not equate to actual knowledge of suit against an insured.”
Liberty Mut. Ins. Co. v. Cruz,
Moreover, State Farm has shown prejudice as a matter of law due to Harwell’s failure to provide notice of the proceedings against Hubbard’s estate. The insured’s failure to notify the insurer of a suit against her does not relieve the insurer from liability for the underlying judgment unless the lack of notice prejudices the insurer.
Cruz,
Furthermore, Anderson’s alleged refusal to defend the suit did not estop State Farm from denying liability based on Har-well’s failure to provide notice of suit. Because this is a summary judgment proceeding, we accept as true Groce’s contention that Anderson told him State Farm refused to defend the suit.
See Nixon,
III.
Harwell also contends that State Farm’s attempt to invalidate service of process on Harwell before she qualified as the estate’s administrator is an impermissible collateral attack on the order appointing Harwell administrator of Hubbard’s estate. In
Bandy v. First State Bank,
IV.
Relying on
McConnell v. Southside Independent School District,
The summary judgment evidence conclusively establishes that State Farm has no obligation to pay the judgment rendered against Tammy D. Hubbard, Deceased, because neither Lula Hubbard [the insured’s mother] nor Valerie Harwell, the Adminis-tratrix of Tammy Hubbard’s estate, promptly sent notices or legal papers received in connection with the accident to State Farm, or cooperated in the investigation, settlement or defense of the lawsuit. The insured’s failure to provide notice prejudiced State Farm’s defense of the lawsuit.
We conclude that State Farm’s motion sufficiently stated the grounds upon which it was relying for summary judgment. First, State Farm expressly alleged prejudice resulting from Harwell’s failure to provide notice of the Leathermans’ suit. Second, State Farm argued that Harwell did not comply with the policy by providing State Farm with notice of the suit against Hubbard’s estate. Implicit in this argument was that State Farm did not receive notice of suit as required by the policy. Therefore, we hold that State Farm’s motion met the standard articulated in
McConnell.
If the grounds upon which State Farm was relying were unclear to Harwell, she should have excepted to the motion.
V.
Because Harwell failed to provide State Farm with notice of the Leathermans’ suit against Hubbard, and the lack of notice prejudiced State Farm’s defense of the suit as a matter of law, we hold that State Farm is not liable for the judgment against Hubbard. *176 Accordingly, we affirm the judgment of the court of appeals.
Notes
. That Groce had Harwell, his secretary, appointed the administrator of the defendant’s estate creates at least an appearance of impropriety, if not a violation of the disciplinary rules. See Tex.Disciplinary R.Prof.Conduct 1.06 (1989), re printed in Tex.Gov't Code, tit. 2, subtit. G, app. A (Supp.1995) (State Bar Rules art. X, § 9) (requiring client consent to representation involving a conflict of interests).
. Because we hold that State Farm is entitled to summary judgment due to Harwell’s failure to provide it with notice of the suit, we need not decide whether the judgment against "Tammy D. Hubbard, Deceased" was void.
. We note that this is not a case in which the insurer received actual knowledge of a
suit
against the insured from a third party.
See Cruz,
