
729 N.W.2d 277 (2006)
273 Mich. App. 388
Everett CASEY and Maryalice Casey, Plaintiffs-Appellants,
v.
AUTO OWNERS INSURANCE COMPANY, Home-Owners Insurance Company, ASU Group, and Meredith Reschly, Defendants-Appellees.
Docket No. 266576.
Court of Appeals of Michigan.
Submitted September 12, 2006, at Detroit.
Decided September 21, 2006.
Approved for Publication December 21, 2006 at 9:15 a.m.
Released for Publication March 14, 2007.
*280 Everett R. Casey, Ferndale and Joseph A. Camardo, Auburn, NY, for Everett and Maryalice Casey.
Secrest Wardle (by Michael L. Updike), Farmington Hills, for Auto-Owners Insurance Company and Home-Owners Insurance Company.
Kopka, Pinkus, Dolin & Eads, PLC (by Mark L. Dolin and Angela K. Harmon-Kuhl), Farmington Hills, for ASU Group and Meredith Reschly.
Before: WHITBECK, C.J., and HOEKSTRA and WILDER, JJ.
PER CURIAM.

I. Overview
Plaintiffs, Everett and Maryalice Casey, appeal as of right the trial court orders denying the Caseys' motions for summary disposition under MCR 2.116(C)(10) and granting defendants, Auto-Owners Insurance Company and its subsidiary Home-Owners Insurance Company (collectively referred to as Auto-Owners), ASU Group, and Meredith Reschly, summary disposition under MCR 2.116(C)(8) and (C)(10). This case arose when a fire damaged the Caseys' home and they filed a claim for insurance benefits. We affirm.


*281 II. Basic Facts And Procedural History
On November 10, 2001, a fire damaged the Caseys' Orchard Lake home. At the time of the fire, Auto-Owners insured the property for fire loss. The policy, which was allegedly effective on the date of the fire, provided the following coverage limits: $805,500 for the dwelling, $80,550 for other structures, $563,850 for personal property, and $161,100 for additional living expenses. The Caseys' principal allegation is that they were not advised of the $805,500 dwelling coverage limit, which was significantly lower than the previous years' dwelling coverage limits.
The Caseys filed suit in propria persona, disputing the amount of coverage available to them under the policy and seeking reformation of the policy limits to an amount that would cover their claimed actual losses, alleging breach of contract and equitable estoppel, and requesting punitive damages. The Caseys alleged that Auto-Owners erroneously recalculated the replacement cost of the home, and then unilaterally and tortiously reduced the replacement-cost coverage. The Caseys asserted that the adjusted policy limits were erroneously low and that Auto-Owners had a duty to establish limits that would actually cover their losses. The Caseys further alleged that ASU Group and its adjuster, Meredith Reschly, whom Auto-Owners appointed to assess the Caseys' property damage, tortiously induced them not to employ a public adjuster and to instead rely on Reschly's determinations. In January 2003, New York attorney Joseph A. Camardo, Jr., was admitted as pro hac vice counsel on the Caseys' behalf.
Numerous competing motions for summary disposition followed. The trial court concluded that equitable estoppel was not a proper cause of action, that Michigan does not recognize a tort claim for bad-faith breach of contract, and that Michigan does not allow punitive damages. The trial court further concluded that exemplary damages were not proper because the Caseys failed to allege torts independent of the claimed breach. The trial court declined to recognize the Caseys' allegations of bad-faith denial of insurance claims and breach of implied duty of good faith and fair dealing as valid claims. With respect to the Caseys' breach of contract and reformation claims, the trial court noted that the Caseys admitted that Reschly had no part in the policy limits' being reduced. The trial court also noted that Everett Casey admitted that he was informed of the policy change at the time it took effect. The trial court then explained that the Caseys did not seek other insurance but accepted the reduced limit by making premium payments after receiving notice of the change. The trial court also concluded that the Caseys misinterpreted MCL 500.2117 because, contrary to their assertions, subsection i of that statute did not require minimum 80 percent replacement cost insurance. The trial court concluded, "Given that the defendant has tendered the policy limits, . . . [there is] no basis for a claim for breach of contract" or reformation of the contract. The trial court ordered that Auto-Owners retender any policy limits that the Caseys had rejected. Ultimately, the trial court granted defendants' motions for summary disposition and denied the Caseys' motions for summary disposition.
The Caseys also moved several times to amend their complaint. The trial court initially denied the motion; however, on reconsideration, the trial court ruled that the Caseys could "amend the complaint to allege further facts relating to the events leading up to the defendants' rejection of [their] insurance claims," but could "not amend to add new counts, claims, or causes of action." Despite the trial court's *282 ruling, the Caseys attempted once more to amend their complaint, but the trial court denied their motion, stating that the 23-count proposed amendment was late and simply restated claims that were previously dismissed.
The Caseys asserted that they were entitled to a mandatory award of statutory interest under MCL 600.6013. The Caseys contended that the previous tenders were conditional advances that became binding on the trial court's order directing Auto-Owners to retender the policy limits. The trial court concluded that no interest was due on the amounts paid before litigation commenced or the amounts that Auto-Owners paid and the Caseys retained during the litigation, explaining that "[t]hose amounts are subject only to the declaratory relief that the [Caseys] are entitled to retain those amounts." However, the trial court concluded that interest was due on the amounts tendered conditionally that the Caseys rejected. Because the trial court could not determine whether the payments for the Caseys' personal property losses were tendered unconditionally or conditionally as a full settlement for all their claims, it requested further evidence on the issue. Ultimately, the trial court concluded that the amounts were tendered as unconditional advances and not as an accord and satisfaction. Accordingly, the trial court held that Auto-Owners was not liable for prejudgment interest on those amounts either. The Caseys now appeal.

III. Summary Disposition

A. Standard Of Review
We review de novo a trial court's ruling on a motion for summary disposition.[1] We also review de novo the proper interpretation and application of an insurance policy.[2] Under MCR 2.116(C)(8), a party may move for summary disposition on the ground that the opposing party has failed to state a claim on which relief can be granted. Under this motion, the legal basis of the complaint is tested by the pleadings alone.[3] All factual allegations are taken as true and construed in the light most favorable to the nonmoving party.[4] The motion should be denied unless the claim is so clearly unenforceable as a matter of law that no factual development can possibly justify a right to recover.[5] Under MCR 2.116(C)(10), a party may move for dismissal of a claim on the ground that there is no genuine issue with respect to any material fact and that the moving party is entitled to judgment as a matter of law. The moving party must specifically identify the undisputed factual issues and support its position with documentary evidence.[6] The trial court must consider all the documentary evidence in the light most favorable to the nonmoving party.[7]
Whether contract language is ambiguous is also a question of law that we review de novo.[8] We review equity cases de novo, but we will not reverse or modify the judgment unless convinced that we *283 would have reached a different result had we occupied the position of the trial court.[9]

B. Breach Of Contract

(1) Notice
It is well established that an insured is obligated to read his or her insurance policy and raise any questions about the coverage within a reasonable time after the policy is issued.[10] Consistent with this obligation, if the insured has not read the policy, he or she is nevertheless charged with knowledge of the terms and conditions of the insurance policy.[11] However, there is an exception to this rule when the insurer renews the policy but fails to notify the insured of a reduction in coverage.[12] When the insurer fails to provide notice, the insurer is bound to the greater coverage in the earlier policy, and the insurer is estopped from denying coverage on the basis of the discrepancy between the current policy and the prior one that was not brought to the insured's attention.[13]
The primary issue here is whether the Caseys received notice of the change in their insurance policy's dwelling coverage limit. The Caseys concede that their insurance agent, James Thurmon, informed them before the fire that their coverage was being reduced. But they argue that they had no notice of the actual amount of their reduced coverage until after the fire. Accordingly, they argue that they should not be bound by that reduced coverage limit and that they should instead receive 100 percent of the full cost to replace their dwelling. Auto-Owners argues that the Caseys are charged with knowledge of their policy's terms and that it fulfilled its duty to notify the Caseys of the reduced coverage when it notified James Thurmon.
At his deposition, Everett Casey admitted that a year before the fire he received notice from James Thurmon that Auto-Owners had chosen to reduce the Caseys' dwelling coverage. Everett Casey also explained that, although he did not recall receiving one, it was possible that he received a copy of his insurance policy when the Caseys purchased the policy in 1995. He also admitted that he "had the opportunity to become aware" of the policy's terms. Later, Everett Casey submitted an affidavit with statements contrary to his deposition testimony. However, a witness is bound by his or her deposition testimony, and that testimony cannot be contradicted by affidavit in an attempt to defeat a motion for summary disposition.[14] Thus, regardless of the assertions made in his affidavit, we accept as binding Everett Casey's deposition testimony. In that testimony, in sum, he stated that he had the opportunity, yet failed, to become familiar with his insurance policy and that James Thurmon notified him a year before the *284 fire that there was going to be a reduction in his coverage.
An insured person, when notified that his or her insurance coverage is being reduced, is bound to inquire into the amount of the reduction.[15] But, as Everett Casey admitted, "no dollar amounts were mentioned" in his conversation with Thurmon. Thus, we conclude that the Caseys are not entitled to relief for breach of contract when Everett Casey admittedly failed to read the policy and knowingly abrogated his duty to inquire about the change in his coverage, thereby implicitly accepting the new coverage limits. "It was his business to know what his contract of insurance was. . . . "[16]

(2) Auto-Owners' Obligations
Everett Casey asserts that it was Auto-Owners' obligation to determine the correct amount of insurance for the home. However, the policy did not impose any duty on Auto-Owners to accurately appraise the property, nor did it include any guarantee that the coverage provided would be adequate to cover any loss that might occur. Although Everett Casey may have reasonably expected that such a duty or guarantee would be imposed by the policy, that expectation cannot overcome the actual terms of the policy. A party cannot be bound to an obligation that, although reasonably expected, is not actually covered by the terms of the agreement.[17] Further, contrary to Everett Casey's belief that he had no basis or responsibility to challenge the reduced coverage, as the trial court pointed out, the Caseys could have rejected the policy change and sought different insurance, or, as outlined in the policy, sought an independent appraisal. The trial court did not err in enforcing the plain language of the insurance contract.

(3) Plain Language of the Contract
The Caseys nevertheless argue that Auto-Owners' limitation on the amount of their recovery was in contravention of the plain language of the insurance contract. The Caseys argue that Auto-Owners was obligated to pay 100 percent of the cost to replace their dwelling. We disagree.
The terms of the insurance policy indicate that the policy is a replacement-cost policy with maximum payment limits for the various categories of loss. Under the policy terms, regardless of whether the limit of insurance applying to the damaged covered property was 80 percent or more, or less than 80 percent, of the full replacement cost of that covered property, in no event was Auto-Owners obligated to pay more than the limit of insurance applying to the damaged covered property. Auto-Owners agreed to pay a specified maximum amount of money in the event of the Caseys' loss. Auto-Owners has tendered to the Caseys the full amount of the stated coverage limits. Therefore, Auto-Owners did not breach the contract.
The Caseys and Auto-Owners were the only parties to the subject contract; thus, the Caseys' claims of breach of contract are inapplicable to ASU Group and Reschly.

C. Reformation
"A court of equity has power to reform the contract to make it conform *285 to the agreement actually made."[18] To obtain reformation, a plaintiff must prove a mutual mistake of fact, or mistake on one side and fraud on the other, by clear and convincing evidence.[19] A unilateral mistake is not sufficient to warrant reformation.[20] A mistake in lawa mistake by one side or the other regarding the legal effect of an agreementis not a basis for reformation.[21]
The Caseys have failed to show by clear and convincing evidence that a mutual mistake has been made. Rather, the Caseys were simply unilaterally mistaken about the terms of their policya mistake that could have been remedied had they inquired about those terms. Thus, we hold that there is no reason to reform the contract.
The Caseys and Auto-Owners were the only parties to the subject contract; thus, the Caseys' claims for reformation are inapplicable to ASU Group and Reschly.

D. Equitable Estoppel
"Estoppel arises where a party, by representations, admissions or silence, intentionally or negligently induces another party to believe facts, and the other party justifiably relies and acts on this belief, and will be prejudiced if the first party is permitted to deny the existence of the facts."[22] It is well established under Michigan law that equitable estoppel is not a cause of action unto itself; it is available only as a defense.[23] The Caseys' attempt to assert equitable estoppel as a cause of action misuses the doctrine.[24] Accordingly, we conclude that the trial court properly dismissed the Caseys' equitable estoppel claim.

E. Statutory Violation
Although the parties may omit them, mandatory statutory provisions of the Insurance Code must be read into insurance contracts.[25] Accordingly, citing MCL 500.2117 and MCL 500.2119, the Caseys argue that Auto-Owners had a duty to ensure that their property was insured for at least 80 percent of its value. However, Auto-Owners maintains that, under MCL 500.2104(3) and MCL 500.2826, it was allowed to set limits on its liability in replacement cost policies. Moreover, Auto-Owners points out that, under MCL 500.2119(7), it is not prohibited "from insuring persons who are not eligible persons."
We agree with the trial court that nothing in MCL 500.2117 prohibits insurers and insureds from agreeing to a policy limit that may be less than an 80 percent replacement cost. Accordingly, we conclude that the trial court properly granted Auto-Owners' first and second motions for *286 summary disposition and correctly denied the Caseys' four motions for summary disposition.

F. Punitive Damages
Punitive damages, which are designed to punish a party for misconduct, are generally not recoverable in Michigan.[26] The exception is if they are expressly authorized by statute.[27] The Caseys have not cited any statute that would grant them punitive damages. Accordingly, we conclude that the trial court properly granted Auto-Owners summary disposition on count four of the Caseys' complaint seeking punitive damages.

IV. Motion To Amend

A. Standard Of Review
"This Court will not reverse a trial court's decision on a motion to amend a complaint absent an abuse of discretion that results in injustice."[28] Similarly, a trial court's decision to allow a supplemental pleading is discretionary.

B. Futility
MCR 2.118(A)(2) states: "[A] party may amend a pleading only by leave of the court or by written consent of the adverse party. Leave shall be freely given when justice so requires." The Michigan Supreme Court has established that motions to amend "should be granted, and denied only for particularized reasons," which include "`undue delay, bad faith or dilatory motive on the part of the movant, repeated failure to cure deficiencies by amendments previously allowed, undue prejudice to the opposing party by virtue of allowance of the amendment, futility of amendment, etc.'"[29]
We conclude that amendment was futile because the Caseys merely sought to add a variety of theories that had no factual or legal basis, and that had essentially already been dismissed by the trial court. A plaintiff cannot maintain an action in tort for nonperformance of a contract.[30] There must be a separate and distinct duty imposed by law.[31] An alleged bad-faith breach of an insurance contract does not state an independent tort claim.[32] Here, all the Caseys' proposed claims stem from an alleged bad-faith breach of contract; therefore, those counts are futile as they fail to state an action independent from their breach of contract claim. Further, in breach of contract cases, the general rule is that exemplary damages are not recoverable absent allegation and proof of tortious conduct that is "independent of the breach."[33] This is because "the plaintiff is adequately compensated" for a breach of contract "when damages *287 are awarded by reference only to the terms of the contract."[34] The Caseys' complaint does not state a tort claim independent from their breach of contract claim. Thus, they are not entitled to exemplary damages.
To the extent that the Caseys are attempting to impose a duty of good faith and fair dealing on the defendants or their attorneys, their claim is without merit. The Michigan Supreme Court has declared that "the public policy of maintaining a vigorous adversary system outweighs the asserted advantages of finding a duty of due care to an attorney's legal opponent."[35]
Recognition of an attorney's duty to an adverse party would . . . impose additional burdens on the attorney. The conflict of interest which would result cannot be resolved . . . simply by allowing the attorney to resolve all doubts in favor of the client, for the existence or reasonableness of the doubts might themselves become jury questions which would defy principled resolution.[[36]]
In short, creation of a duty in favor of an adversary of the attorney's client would create an unacceptable conflict of interest which would seriously hamper an attorney's effectiveness as counsel for his client. Not only would the adversary's interests interfere with the client's interests, the attorney's justifiable concern with being sued for negligence would detrimentally interfere with the attorney-client relationship.[[37]]
Accordingly, we conclude that the trial court properly denied the Caseys leave to amend their complaint.

V. Interest
The Caseys seek prejudgment interest under MCL 600.6013, which states: "Interest is allowed on a money judgment recovered in a civil action, as provided in this section." Auto-Owners argues that the Caseys' acceptance before judgment of a contested amount precludes their right to seek interest, citing this Court's opinion in Darnell v. Auto-Owners.[38] However, in Darnell, this Court stated, "A settlement before judgment `waive[s] the right to statutory interest on [the] amount [recovered] because no final judgment was rendered against the [defendant].'"[39] Here, there was no settlement or dismissal based on settlement.
The trial court's reliance on whether the monies were advanced conditionally or unconditionally is irrelevant given that the statute makes no such distinction. The key issue is whether the Caseys recovered a money judgment. The Caseys assert that the trial court's order confirming their entitlement to the coverage limits and directing Auto-Owners to retender any previously rejected tenders was a final judgment in their favor. However, the judgment is not a money judgment as required by the statute, but rather, as the trial court construed it, "declaratory relief." Because Auto-Owners had already tendered its policy limits to the Caseys, the trial court's order resulted in a mere declaration that the Caseys were entitled *288 to the policy amounts already offered by Auto-Owners. Without a money judgment, the Caseys are not entitled to interest. Accordingly, we conclude that the trial court properly denied the Caseys prejudgment interest.

VI. Sanctions
The Caseys allege numerous violations of the Michigan Court Rules and Michigan Rules of Professional Conduct related to improper answers and other documents filed with the trial court, discovery abuses, and perjury. The trial court ruled:
The Court does not find that either party has filed vexatious pleadings or pleadings which were not grounded in fact, law or a good faith argument for a change in the existing law. Although this litigation has been contentious, it has been neither vexatious nor frivolous. Accordingly, both parties' motions for attorney fees and sanctions are denied.
We review for an abuse of discretion a trial court's decision whether to impose sanctions.[40] "An abuse of discretion occurs when the decision results in an outcome falling outside the principled range of outcomes."[41] After reviewing the extensive record in this case, we cannot conclude that the trial court abused its discretion in deciding not to impose sanctions.
Affirmed.
NOTES
[1]  Grosse Pointe Park v. Mich. Mun. Liability & Prop. Pool, 473 Mich. 188, 196, 702 N.W.2d 106 (2005).
[2]  Id.
[3]  Maiden v. Rozwood, 461 Mich. 109, 119-120, 597 N.W.2d 817 (1999).
[4]  Id. at 119, 597 N.W.2d 817.
[5]  Id.
[6]  MCR 2.116(G)(3)(b) and (4); Maiden, supra at 120-121, 597 N.W.2d 817.
[7]  MCR 2.116(G)(5); Maiden, supra at 120, 597 N.W.2d 817.
[8]  Henderson v. State Farm Fire & Cas. Co., 460 Mich. 348, 353, 596 N.W.2d 190 (1999).
[9]  Capitol S & L Ass'n v. Przybylowicz, 83 Mich.App. 404, 407, 268 N.W.2d 662 (1978).
[10]  VanDyke v. League Gen. Ins. Co., 184 Mich. App. 271, 275, 457 N.W.2d 141 (1990).
[11]  Farm Bureau Mut. Ins. Co. v. Nikkel, 460 Mich. 558, 567, 596 N.W.2d 915 (1999); Auto Owners Ins. Co. v. Zimmerman, 162 Mich.App. 459, 461, 412 N.W.2d 925 (1987).
[12]  Parmet Homes, Inc. v. Republic Ins. Co., 111 Mich.App. 140, 145, 314 N.W.2d 453 (1981); Industro Motive Corp. v. Morris Agency, Inc., 76 Mich.App. 390, 395-396, 256 N.W.2d 607 (1977).
[13]  Parmet Homes, supra at 145, 314 N.W.2d 453; Industro Motive Corp, supra at 395-396, 256 N.W.2d 607.
[14]  Kaufman & Payton, PC v. Nikkila, 200 Mich.App. 250, 256-257, 503 N.W.2d 728 (1993).
[15]  See VanDyke, supra. at 275, 457 N.W.2d 141.
[16]  Cleaver v. Traders' Ins. Co., 65 Mich. 527, 532, 32 N.W. 660 (1887).
[17]  Wilkie v. Auto-Owners Ins. Co., 469 Mich. 41, 63, 664 N.W.2d 776 (2003).
[18]  Raymond v. Auto-Owners' Ins. Co., 236 Mich. 393, 396, 210 N.W. 247 (1926).
[19]  Goldman v. Century Ins. Co., 354 Mich. 528, 533, 93 N.W.2d 240 (1958); Olsen v. Porter, 213 Mich.App. 25, 29, 539 N.W.2d 523 (1995); Progressive Mut. Ins. Co. v. Taylor, 35 Mich.App. 633, 637, 193 N.W.2d 54 (1971).
[20]  Progressive Mut Ins Co, supra at 637, 193 N.W.2d 54.
[21]  Schmalzriedt v. Titsworth, 305 Mich. 109, 119-120, 9 N.W.2d 24 (1943); Olsen, supra at 29, 539 N.W.2d 523.
[22]  Conel Dev., Inc. v. River Rouge Savings Bank, 84 Mich.App. 415, 422-423, 269 N.W.2d 621 (1978).
[23]  Van v. Zahorik, 227 Mich.App. 90, 102, 575 N.W.2d 566 (1997); Hoye v. Westfield Ins. Co., 194 Mich.App. 696, 704-707, 487 N.W.2d 838 (1992).
[24]  Van, supra at 102, 575 N.W.2d 566.
[25]  Stine v. Continental Cas. Co., 419 Mich. 89, 101-102, 349 N.W.2d 127 (1984); Dasen v. Frankenmuth Mut. Ins. Co., 39 Mich.App. 582, 584, 197 N.W.2d 835 (1972).
[26]  Hicks v. Ottewell, 174 Mich.App. 750, 756, 436 N.W.2d 453 (1989).
[27]  Gilbert v. DaimlerChrysler Corp., 470 Mich. 749, 765, 685 N.W.2d 391 (2004).
[28]  Phillips v. Deihm, 213 Mich.App. 389, 393, 541 N.W.2d 566 (1995).
[29]  Ben P. Fyke & Sons v. Gunter Co., 390 Mich. 649, 656, 213 N.W.2d 134 (1973), quoting Foman v. Davis, 371 U.S. 178, 182, 83 S.Ct. 227, 9 L.Ed.2d 222 (1962).
[30]  Ferrett v. Gen. Motors Corp., 438 Mich. 235, 242, 475 N.W.2d 243 (1991); Hart v. Ludwig, 347 Mich. 559, 79 N.W.2d 895 (1956).
[31]  Fultz v. Union-Commerce Assoc., 470 Mich. 460, 467, 683 N.W.2d 587 (2004); Roberts v. Auto-Owners Ins. Co., 422 Mich. 594, 603-604, 374 N.W.2d 905 (1985).
[32]  Roberts, supra at 604, 374 N.W.2d 905; Kewin v. Massachusetts Mut. Life Ins. Co., 409 Mich. 401, 423, 295 N.W.2d 50 (1980).
[33]  See Kewin, supra at 419, 421, 295 N.W.2d 50.
[34]  Id. at 420, 295 N.W.2d 50.
[35]  Friedman v. Dozorc, 412 Mich. 1, 25, 312 N.W.2d 585 (1981).
[36]  Id. at 26, 312 N.W.2d 585.
[37]  Id. at 24-25, 312 N.W.2d 585.
[38]  Darnell v. Auto-Owners Ins. Co., 142 Mich. App. 1, 369 N.W.2d 243 (1985).
[39]  Id. at 16, 369 N.W.2d 243, quoting Awedian v. Theodore Efron Mfg. Co., 66 Mich.App. 353, 358, 239 N.W.2d 611 (1976); see also Quarters v. Michigan Physicians Mut. Liability Co., 154 Mich.App. 593, 597, 399 N.W.2d 46 (1986).
[40]  Bass v. Combs, 238 Mich.App. 16, 26, 604 N.W.2d 727 (1999).
[41]  Woodard v. Custer, 476 Mich. 545, 557, 719 N.W.2d 842 (2006).
