When Sara and Douglas Trask refinanced their mortgage in 2007, their new mortgage incorrectly identified a parcel of unimproved land, rather than the adjacent parcel of improved land that encompassed their residence. The current holder of the 2007 mortgage - US Bank - sued the closing agent - HLC Escrow, Inc. - and the title insurer - First American Title Insurance Company ("First American") - in 2016. US Bank's complaint included causes of action for negligence and "duty of care" against HLC Escrow, and negligence, unilateral mistake, and violation of Maine's Unfair Claims Settlement Practices Act ("UCSPA") against First American. The district court dismissed the complaint, declining to apply Maine's twenty-year statute of limitations for personal actions on certain types of contracts and financial instruments, and further concluding that Maine's six-year limitations period for civil actions barred the bank's claims. See Me. Rev. Stat. Ann. tit. 14, §§ 751 , 752.

We affirm the district court's judgment in substantial part, vacating only its dismissal of US Bank's UCSPA claim against First American. With respect to that claim, we conclude that it was timely filed, as the claim had yet to accrue when First American denied US Bank's initial insurance claim in May 2010.

I.

The Trasks entered into a mortgage agreement with Sun Mortgage New England, Inc. in February 2005. The parties agree that the mortgage encumbered an improved parcel of land along Stream Road in Winterport, Maine. In April 2007, the Trasks refinanced their mortgage with Home Loan Center Inc. d/b/a LendingTree Loans. The property description in the 2007 mortgage identifies a far less valuable parcel of unimproved land also along Stream Road, and also owned by the Trasks. HLC Escrow acted as the closing agent for the transaction, and First American insured the title of the encumbered property. First American also supplied the legal property description for the mortgage. Following a series of assignments, US Bank took ownership of the 2007 mortgage in March 2014. 1

After defaulting on the 2007 mortgage, the Trasks filed a Chapter 7 petition for bankruptcy in December 2009. Three months later, the Trasks filed an adversary complaint against US Bank, asking the bankruptcy court to limit US Bank's mortgage lien to the unimproved parcel. Subsequently, US Bank filed an insurance claim with First American. The insurance claim asserted coverage based on the mortgage's errant identification of the unimproved parcel. In its letter denying the insurance claim on May 10, 2010, First American explained that the policy did not cover the improved parcel, and insured *532 only the parcel actually identified by the mortgage - that is, the unimproved parcel. US Bank filed another insurance claim in early 2011. First American denied this second claim in February of that year, offering the same explanation as it did in denying the first claim.

On June 10, 2011, the bankruptcy court entered a judgment concluding that the trustee of the Trasks' bankruptcy estate had an interest in the improved parcel superior to US Bank's. The Bankruptcy Appellate Panel for the First Circuit affirmed that ruling in December 2011. See In re Trask , 462 B.R. 268 (B.A.P. 1st Cir. 2011). US Bank filed a foreclosure action on the unimproved parcel in December 2013, obtained a favorable judgment in December 2014, and took title to the unimproved parcel following a public sale in April 2015. It then filed its third insurance claim with First American in February 2016. First American denied the claim on May 13, 2016, noting its previous denials, and reasserting its prior interpretation of the policy.

US Bank responded to First American's latest denial by filing suit in state court on August 9, 2016. As noted above, the complaint alleges counts of negligence and duty of care against HLC Escrow, 2 and negligence, unilateral mistake, and violation of the UCSPA against First American. The UCSPA claim asserts that First American "failed to effectuate prompt, fair, and equitable settlement" of US Bank's 2016 insurance claim, "where liability was reasonably clear," and "knowingly misrepresented to US Bank pertinent facts or policy provisions relating to coverage at issue." 3 The complaint does not mention US Bank's earlier-filed insurance claims.

HLC Escrow removed the case to federal court, and both defendants filed motions to dismiss under Federal Rule of Civil Procedure 12(b)(6). The motions asserted, inter alia, that US Bank's claims were time-barred by Maine's six-year statute of limitations for civil actions. See Me. Rev. Stat. Ann. tit. 14, § 752 . First American took the position that US Bank's claims against it accrued no later than May 10, 2010, the date on which it denied US Bank's initial insurance claim. Included as attachments to First American's motion to dismiss were copies of US Bank's 2010 claim letter, First American's letter denying that claim, and First American's letters denying US Bank's 2011 and 2016 insurance claims. First American did not include copies of US Bank's 2011 and 2016 claim letters.

US Bank opposed the motions to dismiss by arguing that Maine's twenty-year limitations period for personal actions on certain types of contracts and financial instruments applied to its causes of action against both defendants, making them timely. See Me. Rev. Stat. Ann. tit. 14, § 751 . As to its claims against First American, US Bank alternatively argued that Maine's six-year statute of limitations did not begin to run until First American denied its 2016 insurance claim. According to US Bank, its initial 2010 insurance claim did not trigger the statute of limitations because that claim was premature. The bank did not "experience[] damages that would demonstrate a cognizable loss" until it took title to the unimproved parcel in April 2015, following the foreclosure proceedings. When it then filed its 2016 insurance claim, "the scope of US Bank's damages *533 was realized," its insurance claim "was no longer hypothetical," and "the remedy of payment on the policy was in place."

The district court granted the motions to dismiss. It rejected US Bank's contention that Maine's twenty-year limitations period applied, and found all of US Bank's claims barred by the six-year statute of limitations. As to the bank's claims against First American, the district court rejected US Bank's argument that its claims did not accrue until First American denied its 2016 insurance claim. Without addressing the bank's prematurity argument, the court reasoned that the limitations period was not "tolled or extended every time US Bank filed the same claim and received a denial on the same basis from [First American]." US Bank, N.A. v. HLC Escrow Inc. , No. 1:16-cv-00453, 2016 WL 7480269 , at *3 (D. Me. Dec. 29, 2016).

On appeal, US Bank contends that the district court erred by failing to apply Maine's twenty-year statute of limitations. It again alternatively argues that its claims against First American were timely even under a six-year limitations period because those claims had yet to accrue when First American denied its initial insurance claim in May 2010.

II.

We review de novo a district court's Rule 12(b)(6) dismissal of a complaint for failure to state a claim based on the statute of limitations. See Santana-Castro v. Toledo-Davíla , 579 F.3d 109 , 113 (1st Cir. 2009). Conducting this review requires us to "accept as true all well-pleaded facts in the complaint and draw all reasonable inferences in favor of the plaintiff[]." Gargano v. Liberty Int'l Underwriters, Inc. , 572 F.3d 45 , 48 (1st Cir. 2009). In addition to the complaint, we may consider documents "incorporated into the movant's pleadings," so long as "they are undisputed" and are "central to" the plaintiff's claims. In re Citigroup, Inc. , 535 F.3d 45 , 52 (1st Cir. 2008); see also Ironshore Specialty Ins. Co. v. United States , 871 F.3d 131 , 135 (1st Cir. 2017). 4

A. Maine's Twenty-Year Statute of Limitations

Civil actions in Maine are subject to a six-year limitations period, unless otherwise provided. See Me. Rev. Stat. Ann. tit. 14, § 752 . One exception to this rule is section 751, title 14, of Maine Revised Statutes, which provides a twenty-year limitations period for "personal actions on contracts or liabilities under seal, promissory notes signed in the presence of an attesting witness, or on the bills, notes or other evidences of debt issued by a bank." There is no question that the 2007 mortgage falls within the category of documents enumerated by section 751. The issue is whether this case constitutes a "personal action[] on " the mortgage. Me. Rev. Stat. Ann. tit. 14, § 751 (emphasis added). US Bank contends that its case is "on" the mortgage because its claims relate to, and revolve around, that document. A long history of Maine case law forecloses this position.

In Young v. Weston , the plaintiff sued to enforce a memorandum in which the defendant had promised to make payments on a note referenced in the document. 39 Me. 492 , 493-94 (1855). The court held that the memorandum constituted a "separate promise" from the note itself, and therefore came within neither the "spirit nor *534 letter" of the twenty-year limitations provision. Id. at 495 ; see also Bunker v. Ireland , 81 Me. 519 , 17 A. 706 (1889) (holding that a suit against a guarantor of a note was not subject to the twenty-year limitations period). Likewise, in Portland Savings Bank v. Shwartz , the Maine Law Court held that an action against an endorser to a note was not an action on the note itself, making the twenty-year limitations period inapplicable. 135 Me. 321 , 196 A. 405 , 406 (1938). The endorser's contract was "distinct from that of the maker of the note," causing it to "not come within the exception of the statute applicable to witnessed notes." Id.

A more recent Law Court case similarly declined to extend the state's twenty-year limitations period to cases that merely relate to a mortgage. In U.S. Bank National Association v. Adams , a bank sought to place an equitable lien on a brother's interest in a property after his sister signed a mortgage encumbering her jointly-held interest in the same. 102 A.3d 774 , 776 (Me. 2014). The court rejected the bank's argument that its claim was "based on the note and mortgage" for purposes of section 751, because the claim was "not an action to enforce the contested note." Id. at 776 n.2. Instead, the action involved an equitable claim against the brother's interest in the property, and the brother was not a party to the note. Id.

These cases make plain that US Bank's claims are not "on" the 2007 note and mortgage. Its claims arise from the obligations created by its relationships with the closing agent and title insurer. Those obligations surely relate to the mortgage in some respects, but that is not enough. The district court correctly followed over a century and a half of Maine case law limiting the twenty-year limitations period to personal actions to enforce qualifying instruments.

We thus affirm the district court's judgment dismissing US Bank's claims against HLC Escrow, as US Bank does not argue that those claims are timely under Maine's six-year statute of limitations. This leaves only the question of whether US Bank's claims against First American are timely under that limitations period.

B. Maine's Six-Year Statute of Limitations

The district court treated US Bank's unilateral mistake, negligence, and UCSPA claims against First American as a group, and found that all three accrued, at the latest, when First American denied US Bank's initial insurance claim on May 10, 2010 - just more than six years before US Bank filed suit on August 9, 2016. That group approach to the timeliness issue ignored some important differences in the causes of action.

The unilateral mistake and negligence claims are unrelated to First American's denials of US Bank's insurance claims. Those two causes of action pertain to First American's alleged provision of the incorrect property description at the mortgage closing. Count II of US Bank's complaint asserts that First American mistakenly provided the legal property description for the unimproved parcel of land, while Count III alleges that First American negligently provided that property description. On the other hand, US Bank's UCSPA claim, set forth in Count I, derives from First American's allegedly wrongful denial of an insurance claim. The complaint alleges that First American "failed to effectuate prompt, fair, and equitable settlement" of US Bank's 2016 insurance claim, "where liability was reasonably clear," and "knowingly misrepresented to US Bank pertinent facts or policy provisions relating to coverage at issue." As these causes of action are based on different events, US

*535 Bank's UCSPA claim is subject to a different statute of limitations analysis than are its unilateral mistake and negligence claims.

1. Unilateral Mistake and Negligence

US Bank's unilateral mistake and negligence claims accrued on the date of the mortgage closing in 2007, or - at the latest - when US Bank discovered that the mortgage property description was incorrect. The claims are untimely in either event.

Negligence actions accrue under Maine law "`when the plaintiff sustains harm to a protected interest,' i.e., when a plaintiff is `entitled to seek judicial vindication.'" Miller v. Miller , 167 A.3d 1252 , 1256 (Me. 2017) (quoting McLaughlin v. Superintending Sch. Comm. , 832 A.2d 782 , 788 (Me. 2003)). For a limited number of tort actions, however, Maine commences the statute of limitations period when the plaintiff discovered, or should have discovered, her injury. See Johnston v. Dow & Coulombe, Inc. , 686 A.2d 1064 , 1066 (Me. 1996). As for unilateral mistake actions, the Law Court has yet to address whether the limitations period runs from the time the mistake was made, or from the time the plaintiff discovered the mistake. 5

We do not need to determine whether the discovery rule applies to unilateral mistake actions under Maine law, or whether US Bank could somehow benefit from that rule in the negligence context. US Bank could have discovered First American's allegedly mistaken and negligent provision of the mortgage property description no later than March 17, 2010, when the Trasks filed their adversary complaint to limit US Bank's mortgage lien to the unimproved parcel. As this date falls more than six years before US Bank filed suit on August 9, 2016, its unilateral mistake and negligence actions are time-barred by the six year statute of limitations.

2. The UCSPA

The district court dismissed US Bank's UCSPA claim on the ground that the cause of action accrued when First American denied US Bank's 2010 insurance claim. In challenging this conclusion, US Bank renews the argument that First American's denial of its 2010 insurance claim could not have triggered the statute of limitations because the bank "had not experienced damages that would demonstrate a cognizable loss" at that time. 6 We agree.

Under Maine law, a cause of action ordinarily does not accrue until the plaintiff incurs a judicially cognizable injury. See , e.g., McLaughlin , 832 A.2d at 788 ; Johnston , 686 A.2d at 1065-66 . Here, the alleged injury is First American's refusal to indemnify US Bank for a loss covered by the bank's title insurance policy. An *536 insurer's duty to indemnify - that is, to compensate its insured for a loss - generally does not arise until the insured incurs a covered loss or liability. See Cambridge Mut. Fire Ins. Co. v. Perry , 197 Me. 94 , 692 A.2d 1388 , 1391 n.3 (1997). In cases involving a mortgagee's title insurance policy, the mortgagee incurs a loss when "the security for the loan proves inadequate to pay off the underlying insured debt due to the presence of undisclosed defects." Hodas v. First Am. Title Ins. Co. , 696 A.2d 1095 , 1097 (Me. 1997); see also 11A Steven Plitt et al., Couch on Insurance § 159:6 (3d ed. 2017). 7 Hence, a cause of action based on a title insurer's refusal to indemnify a mortgagee will ordinarily accrue, at the earliest, when the mortgagee's security "proves inadequate," thus establishing a loss that triggers the insurer's duty to indemnify.

The security for US Bank's loan had yet to prove inadequate when First American rejected its 2010 insurance claim. At that point, US Bank was engaged in an adversary proceeding against the Trasks. At issue in that proceeding was whether the bank's mortgage interest extended to the improved parcel, or was instead limited to the less valuable unimproved parcel. If US Bank had prevailed in arguing that the mortgage encumbered the improved parcel, its security would presumably have been adequate to cover the Trasks' debt. US Bank thus did not incur a loss until - at the earliest - the bankruptcy court rejected its position and entered judgment in 2011 finding that the bank's mortgage encumbered only the unimproved parcel. Accordingly, First American's denial of US Bank's earlier-filed insurance claim could not have served as the accrual date for its UCSPA cause of action. That cause of action accrued no earlier than the close of the adversary proceeding, which falls within Maine's six-year limitations period.

We thus must vacate the district court's dismissal of US Bank's UCSPA claim and remand for further proceedings on that claim. 8 In so doing, we do not need to determine the precise date on which the security for US Bank's loan "prove[d] inadequate," thus triggering a loss. Hodas , 696 A.2d at 1097 . US Bank's UCSPA claim was timely for statute of limitations purposes regardless of whether its loss occurred at the close of the adversary proceedings in 2011, or, as it argues, when it later took possession of the unimproved parcel.

III.

For the reasons discussed above, we affirm in part and vacate in part the district court's judgment. We affirm as to the dismissal of US Bank's claims against HLC Escrow, and its unilateral mistake and negligence claims against First American. We vacate the dismissal, and remand for further proceedings, with respect to US Bank's UCSPA claim against First American.

US Bank and First American shall bear their own costs on appeal. HLC Escrow's costs shall be taxed to US Bank.

So Ordered.