OPINION

Emily Diaz, the owner of a home warranty plan from First American Home Buyers Protection Corporation, filed a class action complaint alleging that First American refused to make timely repairs, used substandard contractors and wrongfully denied claims. She asserted state law claims for unfair competition, misrepresentation, concealment, breach of contract and breach of the implied covenant of good faith and fair dealing. The district court dismissed Diaz’s unfair competition and concealment claims under Federal Rule of Civil Procedure 12(b)(6). Following denial of class certification, First American made an offer of judgment on Diaz’s remaining individual claims pursuant to Federal Rule of Civil Procedure 68. When Diaz did not accept the offer, First American moved to dismiss these claims for lack of subject matter jurisdiction. Agreeing that First American’s unaccepted Rule 68 offer rendered Diaz’s remaining claims moot, the district court dismissed the claims under Federal Rule of Civil Procedure 12(b)(1), entering judgment in favor of neither party. Diaz appealed.

We vacate the district court’s dismissal of Diaz’s remaining individual claims. We hold that an unaccepted Rule 68 offer that would fully satisfy a plaintiffs claim is insufficient to render the claim moot. See McCauley v. Trans Union, L.L.C., 402 F.3d 340, 342 (2d Cir.2005). Diaz’s remaining claims, therefore, were not made moot by her refusal to accept First American’s Rule 68 offer, even assuming that the offer would have fully satisfied her claims. Accordingly, we vacate the Rule 12(b)(1) dismissal of Diaz’s claims for misrepresentation, breach of contract and breach of the implied covenant of good faith and fair dealing.

BACKGROUND

Emily Diaz brought this class action against First American Home Buyers Protection Corporation on behalf of a putative nationwide class consisting of all persons who made a claim under a home warranty plan obtained from First American after March 2003. After First American removed the action to federal court, the district court issued a series of orders dismissing Diaz’s claims for concealment, false promise, unfair competition and violation of the California Consumer Legal Remedies Act under Rule 12(b)(6). In September 2011, the district court entered an order denying Diaz’s motion for class certification.

A short time thereafter, First American made an offer of judgment to Diaz on her remaining individual claims — for misrepresentation, breach of contract and breach of the implied covenant of good faith and fair dealing — pursuant to Rule 68. First American offered to allow judgment to be entered against it and in favor of Diaz in the total amount of $7,019.32, plus costs allowed under Rule 54. The offer further provided that, “[i]f this Offer is not accepted ..., this Offer shall have no effect, be null and void, and be deemed withdrawn, and shall not be presented, admitted, or used for any purpose in any case or proceeding against First American.” Diaz had until October 17, 2011 to accept the offer. She did not do so.

First American then filed a motion to dismiss the action for lack of subject matter jurisdiction. First American argued that the district court “should dismiss this action pursuant to Rule[] 12(b)(1) of the Federal Rules of Civil Procedure because the action is moot in light of Plaintiffs refusal to accept a Rule 68 Offer of Judgment for full satisfaction of the amount she could possibly recover at trial.” Citing decisions by the Seventh and Fourth Circuits, see Thorogood v. Sears, Roebuck & Co., 595 F.3d 750, 753 (7th Cir.2010); Greisz v. Household Bank (Illinois), N.A., 176 F.3d 1012, 1015 (7th Cir.1999); Rand v. Monsanto Co., 926 F.2d 596, 598 (7th Cir.1991); Zimmerman v. Bell, 800 F.2d 386, 390 (4th Cir.1986), First American argued that “[w]here, as here, a plaintiff rejects a Rule 68 Offer of Judgment for the full amount of relief, the district court loses subject matter jurisdiction and must dismiss the action with prejudice.” Under these decisions, “[o]nce the defendant offers to satisfy the plaintiffs entire demand, there is no dispute over which to litigate, and a plaintiff who refuses to acknowledge this loses outright, under Fed.R.Civ.P. 12(b)(1), because he has no remaining stake.” Rand, 926 F.2d at 598 (citation omitted).

In ruling on First American’s motion, the district court agreed with First American that the Rule 68 offer would have fully satisfied Diaz’s remaining individual claims. With respect to monetary relief, First American’s offer provided “the full amount of relief she is entitled to individually.” The court recognized that the Rule 68 offer did not provide for injunctive or declaratory relief, each of which Diaz had sought in her complaint. But the court found that Diaz was not entitled to either of these forms of relief. The court deemed Diaz’s request for an injunction “not appropriate” because “she has been offered, and declined, an adequate remedy at law” and “she no longer holds a home warranty plan with First American.” Similarly, the court found that Diaz’s claim for declaratory relief was “duplicative of her breach of contract and breach of the implied covenant claims” and “superfluous” given that she no longer had a home warranty plan with First American.

Having determined that First American’s offer would have provided Diaz complete relief on her remaining individual claims, the court went on to hold that the unaccepted offer was sufficient to render those claims moot. Like First American, in the absence of Ninth Circuit authority the court reached this conclusion by relying on decisions of the Seventh and Fourth Circuits, citing Thorogood, 595 F.3d at 753 , Greisz, 176 F.3d at 1015 , Zimmerman, 800 F.2d at 390 , and Rand, 926 F.2d at 598 . Having determined that the claims were moot, the court granted First American’s motion and dismissed the claims for lack of subject matter jurisdiction. The court initially entered judgment against Diaz, but subsequently vacated that judgment and declined to enter judgment or award costs for either party. Diaz appealed.

STANDARD OF REVIEW

“We apply a de novo standard for reviewing a district court’s-decision on subject matter jurisdiction, and, concomitantly apply that standard in reviewing questions of mootness.” Sample v. Johnson, 771 F.2d 1335, 1338 (9th Cir.1985) (citation omitted).

DISCUSSION

Diaz argues that the district court erred by dismissing her remaining individual claims for lack of subject matter jurisdiction following her refusal to accept First American’s Rule 68 offer of judgment. She maintains that these claims were not moot, because: (1) an unaccepted Rule 68 offer does not render a claim moot, even if the offer would have fully satisfied the plaintiffs claim; (2) even if such an offer does moot a claim, First American’s offer did not provide complete relief; and (3) her remaining claims were not moot be cause she retained a personal stake in appealing the denial of class certification. We agree with Diaz’s first argument and therefore do not reach her second and third contentions.

Diaz’s first argument requires us to decide whether an unaccepted Rule 68 offer that would have fully satisfied a plaintiffs claim is sufficient to render the claim moot. The Supreme Court has yet to address this issue. See Genesis Healthcare Corp. v. Symczyk, — U.S. —, 133 S.Ct. 1523, 1528-29 , 185 L.Ed.2d 636 (2013) (“While the Courts of Appeals disagree whether an unaccepted offer that fully satisfies a plaintiffs claim is sufficient to render the claim moot, we do not reach this question, or resolve the split, because the issue is not properly before us.” (footnote omitted)). Nor have we squarely addressed the issue. In Pitts v. Terrible Herbst, Inc., 653 F.3d 1081, 1091-92 (9th Cir.2011), we held “that an unaccepted Rule 68 offer of judgment — for the full amount of the named plaintiffs individual claim and made before the named plaintiff files a motion for class certification — does not moot a class action” (emphasis added), but we did not squarely address whether the offer mooted the plaintiffs individual claim. We assumed that an unaccepted offer for complete relief will moot a claim, but we neither held that to be the case nor analyzed the issue. See id. at 1090-92 . In GCB Communications, Inc. v. U.S. South Communications, Inc., 650 F.3d 1257, 1267 (9th Cir.2011), we noted that a case will “become moot” when “an opposing party has agreed to everything the other party has demanded,” but we did not address the effects of an unaccepted Rule 68 offer, an issue not presented in that case. We therefore treat this as an open question in this circuit.

Other circuits are divided on the question. The Seventh Circuit holds that an unaccepted Rule 68 offer for complete relief will moot a plaintiffs claim and that the plaintiff loses outright. See Rand v. Monsanto Co., 926 F.2d 596, 598 (7th Cir.1991) (“Once the defendant offers to satisfy the plaintiffs entire demand, there is no dispute over which to litigate, and a plaintiff who refuses to acknowledge this loses outright, under Fed.R.Civ.P. 12(b)(1), because he has no remaining stake.” (citation omitted)).

The Sixth Circuit agrees "with the Seventh Circuit that “an offer of judgment that satisfies a plaintiffs entire demand moots the case,” but disagrees “with the Seventh Circuit’s view that a plaintiff loses outright when he refuses an offer of judgment that would satisfy his entire demand.” O’Brien v. Ed Donnelly Enters., Inc., 575 F.3d 567, 574-75 (6th Cir.2009). The Sixth Circuit holds that “the better approach is to enter judgment in favor of the plaintiffs in accordance with the defendants’ Rule 68 offer of judgment.” Id. at 575 .

Finally, the Second Circuit disagrees with the Sixth and Seventh Circuit that an unaccepted Rule 68 offer for complete relief moots a plaintiffs claim, see McCauley v. Trans Union, L.L.C., 402 F.3d 340, 342 (2d Cir.2005) (“In the absence of an obligation to pay [the plaintiff] the $240 in claimed damages, the controversy between [the plaintiff] and [the defendant] is still alive.”), but agrees with the Sixth Circuit that when such an offer has been made, the “better resolution” is to enter judgment against the defendant, although the Second Circuit may require as a precondition to entering such a judgment that the defendant expressly consents to its entry. See id. (“At oral argument, both parties agreed that entry of a default judgment would satisfactorily resolve this case.”). “Such a judgment would remove any live controversy from this case and render it moot.” Id.

Although the majority of courts and commentators appear to agree with the Seventh Circuit that an unaccepted offer will moot a plaintiffs claim, four justices of the United States Supreme Court, as well as the Solicitor General of the United States, embraced a contrary position in Genesis Healthcare. As noted, the majority in Genesis Healthcare did not reach whether an unaccepted offer that fully satisfies a plaintiffs claim is sufficient to render the claim moot. See Genesis Healthcare, 133 S.Ct. at 1528-29 . In a dissenting opinion, however, Justice Kagan, writing for all four justices who reached the question, agreed with the Second Circuit that “an unaccepted offer of judgment cannot moot a case.” Id. at 1533 (Kagan, J., dissenting); accord Brief for the United States as Amicus Curiae Supporting Affirmance, Genesis Healthcare Corp. v. Symczyk, — U.S. —, 133 S.Ct. 1523 , 185 L.Ed.2d 636 (2013) (No. 11-1059), 2012 WL 4960359 , at *10-15.

Justice Kagan explained:

Genesis Healthcare, 133 S.Ct. at 1533-34 (Kagan, J., dissenting) (some alterations in original) (emphasis added).

Justice Kagan also emphasized that nothing in Rule 68 authorizes a court to enter judgment in accordance with an unaccepted offer:

Id. at 1536 (alterations in original).

We are persuaded that Justice Kagan has articulated the correct approach. We therefore hold that an unaccepted Rule 68 offer that would have fully satisfied a plaintiffs claim does not render that claim moot. This holding is consistent with the language, structure and purposes of Rule 68 and with fundamental principles governing mootness. These principles provide that “[a] case becomes moot only when it is impossible for a court to grant ‘any effectual relief whatever to the prevailing party.’ ” Knox v. Serv. Employees Int’l Union, — U.S. —, 132 S.Ct. 2277, 2287 , 183 L.Ed.2d 281 (2012) (quoting City of Erie v. Pap’s A.M., 529 U.S. 277, 287 , 120 S.Ct. 1382 , 146 L.Ed.2d 265 (2000)). Here, once First American’s offer lapsed, it was, by its own terms and under Rule 68, a legal nullity. Diaz’s

Genesis Healthcare, 133 S.Ct. at 1534 (Kagan, J., dissenting). We recognize that a court may have “discretion to halt a lawsuit by entering judgment for the plaintiff when the defendant unconditionally surrenders and only the plaintiffs obstinacy or madness prevents her from accepting total victory.” Id. at 1536; cf. McCauley, 402 F.3d at 342 ; Chathas v. Local 134 Int’l Bhd. of Elec. Workers, 233 F.3d 508, 512-13 (7th Cir.2000). That did not occur here, however. Accordingly, we vacate the Rule 12(b)(1) dismissal of Diaz’s claims for misrepresentation, breach of contract and breach of the implied covenant of good faith and fair dealing and remand for further proceedings.

CONCLUSION

We hold that the district court erred by dismissing Diaz’s remaining individual claims for lack of subject matter jurisdiction. We vacate the dismissal of those claims and remand to the district court. For the reasons stated in the concurrently filed memorandum disposition, we also vacate dismissal of Diaz’s concealment and unfair competition claims and lack jurisdiction to review the district court’s order denying Diaz’s motion to correct or modify the record. Each party shall bear its own costs of appeal.

VACATED AND REMANDED.

. We address the parties' remaining contentions in a concurrently filed memorandum disposition. . The offer of judgment provided: First American has offered to allow judgment to be entered against it and in favor of Plaintiff in full resolution of her remaining individual claims asserted against First American in this action. First American has offered Plaintiff judgment in the total amount of $7,019.32, plus costs allowed under Rule 54 and now accrued that may be taxed by the Court, which, pursuant to Rule 54, do not include attorneys' fees. The total amount of $7,019.32 includes all damages and relief that could be awarded pursuant to final judgment on Plaintiff's claims, including: (a) Plaintiff's claimed damages, in the amount of $1,649.00 (calculated to include the claimed purchase price of the home warranty contracts) ($660.00 and $750.00, respectively, for $1,410.00 total), Plaintiff's claimed out-of-pocket expenses for a repair in December 2008 ($129.00), and Plaintiff’s claimed payments for service fees (two payments of $55.00, for $110.00 total); (b) prejudgment interest in the total amount of $423.32, calculated pursuant to Cal. Civ.Code § 3287 et seq.; and (c) an additional amount of consideration of $4,947.00 (three times Plaintiff’s claimed damages) for any other damages or relief sought by Plaintiff. . In the absence of controlling Ninth Circuit precedent on point, the district court here followed the Seventh Circuit's approach. . Still other circuits, including this one, have yet to address whether an unaccepted offer of judgment renders a claim moot. See, e.g., Zinni v. ER Solutions, Inc., 692 F.3d 1162 , 1167 n. 8 (11th Cir.2012) (declining to decide "whether an offer for full relief, even if rejected, would be enough to moot a plaintiff’s claims”). . See, e.g., Warren v. Sessoms & Rogers, P.A., 676 F.3d 365, 371 (4th Cir.2012) ("When a Rule 68 offer unequivocally offers a plaintiff all of the relief 'she sought to obtain,’ the offer renders the plaintiff’s action moot.” (citation omitted)); Lucero v. Bureau of Collection Recovery, Inc., 639 F.3d 1239, 1243 (10th Cir.2011) ("As Rule 68 operates, if an offer is made for a plaintiff’s maximum recovery, his action may be rendered moot.”); Thorogood v. Sears, Roebuck & Co., 595 F.3d 750, 752 (7th Cir.2010) ("The offer exceeded the amount in controversy and so the case was moot.”); Samsung Elecs. Co. v. Rambus, Inc., 523 F.3d 1374, 1379 (Fed.Cir.2008) ("An offer for full relief moots a claim for attorney fees.”); Krim v. pcOrder.com, Inc., 402 F.3d 489, 502 (5th Cir.2005) ("[A] full settlement offer, even if refused, would dispose of [the plaintiff’s] individual claims.”); Weiss v. Regal Collections, 385 F.3d 337, 342 (3d Cir.2004) ("[U]nder traditional mootness principles, an offer for the entirety of a plaintiff’s claim will generally moot the claim.”); Greisz v. Household Bank (Illinois), N.A., 176 F.3d 1012, 1015 (7th Cir.1999) (holding that an offer of judgment that encompasses the relief claimed "eliminates a legal dispute upon which federal jurisdiction can be based,” because "|y]ou cannot persist in suing after you've won”); 13B Charles Alan Wright & Arthur R. Miller, Federal Practice and Procedure § 3533.2 (3d ed. 2013) ("Even when one party wishes to persist to judgment, an offer to accord all of the relief demanded may moot the case.”); Schwarzer, Tashima & Wagstaffe, Federal Civil Procedure Before Trial ¶ 15:156.5 (9th ed. 2013) ("If a defendant offers judgment in complete satisfaction of plaintiff's claims, plaintiff’s claims generally are rendered moot because plaintiff lacks any remaining interest in the outcome of case.”); 1 Joseph M. McLaughlin, McLaughlin on Class Actions § 4:28 (9th ed. 2012) ("Traditional mootness principles provide that an offer of judgment under Federal Rule of Civil Procedure 68 that satisfies a plaintiff’s entire demand moots the claim. The mere offer of full relief eliminates any concrete adversity between the plaintiff and defendant, and renders the underlying dispute moot by negating the plaintiff’s personal stake in the dispute.” (footnote omitted)); 1 Rubenstein & Conte, Newberg on Class Actions § 2:15 (5th ed. 2013) ("If the defendant makes a full offer of judgment pursuant to Rule 68, completely satisfying all of the named plaintiff’s individual claims, then the named plaintiff’s individual case necessarily becomes moot.”).