### IN THE SUPREME COURT OF IOWA
No. 12

– 0222
Filed December 20 , 2013

WILLIAM L. BURKHALTER, Appellant,

vs. STEVEN P. BURKHALTER, Appellee.

On review from the Iowa Court of Appeals.

Appeal from the Iowa District Court for Linn County, James H. Carter, Senior Judge.

The plaintiff in an action to contest a modification to the terms of a revocable trust appeals. DECISION OF COURT OF APPEALS VACATED; DISTRICT COURT JUDGMENT AFFIRMED.

Martin A. Diaz and Elizabeth Jenadija Craig of Martin Diaz Law Firm, Iowa City, for appellant.

William G. Nicholson and Robert R. Rush of Rush & Nicholson, P.L.C., Cedar Rapids, for appellee.2

APPEL, Justice.
William Burkhal ter challenged an unfavora ble modification of his father’s revocable trust that occurred just prior to his father’s death. William claimed his brother, Steven Burkhalter, unduly influenced their father and tortiously interfered with the trust. William also alleged his
father lack ed the necessary testamentary intent when he made the modification. At trial, the district court directed a verdict for Steven on
the tortious interference claim , and the jury returned a verdict for Steven on the testamentary capacity and undue influence claims. William appealed, claiming the district court gave the jury an erroneous instruction on undue influence that improperly heightened his burden of proof and prejudicially repeated the causation element. Steven cross

appealed, claiming the district court should have directed a verdict in his favor on all claims. On direct appeal, the court of appeals held the challenged instruction prejudiced William and remanded the case for a new trial on the undue influence claim. The court of appeals denied
Ste ven’s cross

- appeal. On further review, we conclude the district court’s instruction accurately reflected the law of undue influence and did not unduly emphasize the causation element of the undue influence claim. As a result, we vacate the decision of the court of appeals and reinstate the jury verdict and the district court’s judgment thereon.
I. Factual and Procedural Background.
Louis D. Burkhalter Jr. created the Louis D. Burkhalter Jr. Revocable Trust on January 14, 1980. Under the original terms of the trust, William was the primary beneficiary following the deaths of Louis and his wife, Margaret. Upon William’s death, the trust directed the trustee to distribute the remaining assets to Louis’s heirs. The trust3

designated the United States Bank, n/k/a U.S. Bank, N.A., of Cedar Rapids as trustee. In 1995, Louis amended the trust to name William’s wife, Cynthia, and his son, Matthew, as beneficiaries. Under the amended terms, Cynthia and Matthew would continue as beneficiaries following the
deaths of Louis, Margaret, and William. Upon the deaths of Cynthia and Matthew, the remaining assets would be distributed to Louis’s heirs. In 2003, Louis amended the trust to allow the trustee, at its discretion, to distribute trust assets for the support of Louis’s sister, Patricia. In 2004, Louis placed his home into the trust. At the time, William was living in the home with his family. Louis directed that William and his family have complete control of the residence as long as
their decisions were reaso nable and approved by the trustee. By early July 2007, Louis, who was then ninety

- eight years old, experienced a decline in health. He was moved from an independent

living wing at an assisted living community, where he had lived for several years, to a wi ng that provided twenty

- four

- hour care. Steven became aware of the change and, on July 9, traveled from his home in California to Iowa to visit his father. According to Steven, Louis and he had a conversation about the trust on July 11. During the conve rsation, Steven claimed, Louis indicated his desire to modify the trust to make Steven and William equal beneficiaries and instructed Steven to call the trustee to arrange the modification.
A few hours after the conversation with Louis , Steven met with a trust officer of the bank, who in turn called Louis’s attorney. The trust officer, a longtime advisor of Louis, met with Louis later that day without Steven being present. Louis’s attorney met with Louis the following day, July 12, again without Steven b eing present. The t rust was modified4

July 13 to divide the trust assets equally between William and Steven. 1 Louis died six days later. On January 25, 2008, William filed a petition claiming that the modification was the result of undue influence, that Louis lacked the testamentary capacity to make the change, and that Steven intentionally and improperly interfered with the distribution plan of the trust. Trial was held from October 31, 2011, to November 4. Following the close of evidence, Steven moved for a directed verdict on all claims. The district
court directed a verdict on the tortious interference claim, but refused to
direct a verdict on the undue influence and lack of testamentary capacity
claims. The parties then proceeded to haggle on jury instructions. With regard to undue influence, William generally modeled his requested jury
instruction s on the Iowa Civil Jury Instructions of the Iowa State Bar
Association . The Iowa Civil Jury Instructions provide one instruction setting forth the ele ments of undue influence and another defining undue influence. Iowa Civil Jury Instruction 2700.4 sets forth the
elements of undue influence: The law presumes a person is free from undue influence. To overcome this presumption, plaintiff must prove each of the four following propositions:
1

. At the time the will was made (testator) was susceptible to undue influence.
2

. [Defendant] had the opportunity to exercise such influence and carry out the wrongful purpose.
3

. [Defendant] was inclined to influence (testator) unduly for the purpose of getting an improper favor.

1 Louis’s wife, Margaret, and sister, Patricia, were removed as beneficiaries of the trust at this time because they had predeceased Louis. William’s son, Matthew, and wife, Cynthia, remained as future beneficiaries of William’s fifty

- percent share.5 4. The result was clearly brought about by undue influence. If the plaintiff has failed to prove one or more of these propositions, your verdict will be for the defendant. If plain tiff has proved all of these propositions, your v erdict will be for plaintiff. Iowa State Bar Ass’n, Iowa Civil Jury Instructions 2700.4 (2011)

. Iowa Civil Jury Instruction 2700.5 provides a definition of “undue influence ” : Undue influence means a person substitutes his or her intentions for those of the person making the will. The will then expresse s the purpose and intent of the person exercising the influence, not those of the maker of the will. Undue influence must be present at the very time the wil l is signed and must be the controlling factor. The person charged with exercising undue influence need not be personally present when the will was being made or signed but the person’s influence must have been actively working at the time the will was be ing made and signed.
Id. 2700.5. The district court’s proposed instruction merged the se two model
instructions . The district court’s pro posed Instruction No. 2 stated:

In order for William to prevail on his claim of undue influence, he must prove by a preponderance of the evidence that at or about the time the trust provisions were changed all of the following circumstances existed:
1. Louis was susceptible to the type of influence described in Paragraph 4 of this instruction.
2. Steven had the opport unity to exercise such influence over Louis.
3. Steven was inclined to influence Louis for purposes of gaining favor.
4. Steven assumed a position of dominance over Louis’s decision to the extent that the decision to change the trust provisions was Steve n’s decision rather than Louis’s decision.
5. The changes made to the trust provisions were clearly the result of the foregoing circumstances.6 As is apparent, subparagraphs 1, 2, 3, and 5 of Instruction No. 2
stated the substance of the elements of undue influence contained in Iowa Civil Jury Instruction 2700.4. Subp aragraph 4, however, contained language related to the definition of undue influence contained in Iowa Civil Jury Instruction No. 2700.5.
William objected to the cou rt’s proposed Instruction No. 2, but t he district court declined to modify the instruction. The jury returned a verdict in favor of Steven on the remaining claims. William filed a motion for a new trial, which was denied, and this appeal followed.
We transferred the case to the court of appeals. The court of appeals reversed the district court and remanded for a new trial after concluding the district court’s addition of subparagraph 4 prejudiced William. According to the court of appeals, the addition of subparagraph 4 “added another step the plaintiff had to prove, thereby rendering the instruction faulty either through repetition, or by giving undue emphasis to otherwise correct statements of law.” Finally, the court of appeals noted it found sufficient evidence to deny Ste ven’s directed verdict and send the undue influence issue to the jury. Steven sought further review, which we granted.
II. Standard of Review. Challenges to jury instructions are reviewed for correction of errors
at law. Koenig v. Koenig , 766 N.W.2d 635, 637 (Iowa 2009). Error in giving a jury instruction “does not merit reversal unless it results in prejudice.” Wells v. Enter. Rent

- A

- Car Midwest , 690 N.W.2d 33, 36 (Iowa 2004). When the challenged instruction is “ ‘conflicting and confusing,’ ”

err or is presumed prejudicial and reversal is required. Koenig , 766 N.W.2d at 637 (quoting Waits v. United Fire & Cas. Co. , 572 N.W.2d 565,7

575 (Iowa 1997)). Reversal is also required when the instruction
contains a material misstatement of law. Waits , 572 N.W.2d at 575.
III. Discussion.
A. Introduction. As noted by one modern treatise, the notion of undue influence upon a testator is “a slippery concept at best.” Eunice
L

. Ross & Thomas J. Reed, Will Contests § 7 : 1 (2d ed.) , available at http://www.w e stlaw.com (updated June 2013) [hereinafter Ross &
Reed ]. The treatise further notes that “[t]he courts have never been consistent in their definitions of the term, nor in the judicial tests used to evaluate proof of undue influence.” Id

. § 7 : 1

. The difficulty with the notion of undue influence in the context of a will is illustrated by the question of the appropriate standard of proof required to prevail on a claim. On the one hand, undue influence seems like a relative of fraud, which generally requires a heightened standard of proof. See, e.g. , Joseph Traub Arenson, The Doctrine of Undue Influence in Anglo American Law 4 (1953) [hereinafter Arenson] (noting that fraud and undue influence are similar in that someone has been unfairly
enriched a t the expense of another, but that “[u]ndue influence is a more restricted and more indefinite concept”). On the other hand, undue influence can occur without a material misrepresentation or omission, see In re Estate of Raedel , 568 A.2d 331, 335 (Vt. 198 9), which makes it analogous to ordinary civil causes of action at law where a preponderance

- of

- the

- evidence standard prevails. This case requires us to consider the proper elements of an undue influence claim. In particular, the question arises whether a n element of an undue influence claim is that the result is “clearly” the effect of undue influence. This “clearly” requirement sounds like clear

- and

- convincing

evidence

- light, at least as to causation.8 These important legal questions arise against a back drop of some judicial discomfort with the claim. The occasional but potentially very sharp unfairness that will result if undue influence claims are abandoned altogether seems like too much for courts to bear. See Arenson at 68 (declaring the evolution o f undue influence doctrine a fortunate jurisprudential gain that extends social justice for “the aged and infirm, the weak, the dependent, the subservient and the inexperienced”). Yet , opportunistic strike litigation where the testator is
not available to defend what may very well have been a choice of free will is not very attractive either. See John H. Langbein, Will Contests , 103 Yale L.J. 2039, 2045 (1994) [hereinafter Langbein] (suggesting the will contest involving the Johnson & Johnson fortune reve aled “deeply deficient institutions and procedures” in the United States that “ would have been suppressed in short order” in any other Western country). Further, fact finders may be tempted not to focus on the free will of the testator, but rather on thei r own values or senses of propriety.
Melanie B. Leslie, The Myth of Testamentary Freedom , 38 Ariz. L. Rev. 235, 245 (1996) [hereinafter Leslie] (arguing that even though the contestant bears the burden of establishing undue influence, “determinations ofte n are more dependent on courts’ normative views of the relationships between the testator, beneficiary and contestant than the actual presence or absence of factors often deemed indicative of undue influence”). So, courts have struggled with the concept of undue influence. Today, it is our turn.
B. Positions of the Parties. William focuses his fire on Instruction No. 2’s portrayal of the elements of undue influence in two ways. First, William argues the addition of subparagraph 4 coupled with9

the “clear ly” language of subparagraph 5 heightened his burden of proof to something higher than a preponderance of the evidence, which rendered the instruction conflicting, confusing, and prejudicial. According to William, the instruction allowed the jury to find the required elements of undue influence described in subparagraphs 1 through 4, but then conclude he could not prevail because subparagraph 5 required him to show the modifications to the trust “were clearly the result” of the
circumstances described in t he previous subparagraphs. He also points to Instruction No. 2’s introductory paragraph, which instructed the jury to apply a preponderance

- of

- the

- evidence standard. Second, William asserts Instruction No. 2 was unduly repetitive. William notes that
sub paragraphs 4 and 5 both address causation and that, if he proved subparagraph 4, he should have prevailed on his claim. Accordingly, William requests a new trial. Steven responds that Instruction No. 2 was a correct statement of law. He claims the requi rement of subparagraph 5 that the action complained of must clearly be the result of undue influence is well supported by our caselaw. See , e.g. , In re Estate of Dankbar , 430 N.W.2d 124, 128 (Iowa 1988); In re Estate of Davenport , 346 N.W.2d 530, 532 (Iowa 1984). He notes the rationale of the substantive standard is to prevent weak circumstantial evidence from supporting a finding of undue
influence. See 1 Sheldon F. Kurtz, Kurtz on Iowa Estates § 4.45, at 175 (1981) [hereinafte r Kurtz]. Steven also claims subparagraph 4 is a
correct statement of law taken from the definition of undue influence contained in Iowa Civil Jury Instruction 2700.5 and supported by
caselaw. See , e.g. , In re Estate of Cory , 169 N.W.2d 837, 842 (Iowa
19 69); In re Estate of Roberts , 258 Iowa 880, 888, 140 N.W.2d 725, 730 (1966). Under the circumstances, Steven sees no undue repetition of a10

claim or defense favorable to him. He argues it was not error to combine subparagraphs 4 and 5 because jury instruc tions must be read together and considered in their entirety. See Anderson v. Webster City Cmty.
Sch. Dist. , 620 N.W.2d 263, 265 (Iowa 2000); Leaf v. Goodyear Tire &
Rubber Co. , 590 N.W.2d 525, 536 (Iowa 1999). Steven further claims nothing in Instructio n No. 2 altered the
standard of proof. Steven argues subparagraph 5 dealt solely with the preponderance

- of

- the

- evidence standard and provided an accurate statement of law. He further notes, the preponderance

- of

- the

- evidence standard was repeated in Instr uction No. 2’s first paragraph. Steven argues that because instructions must be read as a whole, if some part of Instruction No. 2 should not have been given, error was nonetheless cured because another part of the instruction properly advised the jury
of the legal principles involved. See Moser v. Stallings , 387 N.W.2d 599, 605 (Iowa 1986). When the instructions are read as a whole, Steven argues, any error was not prejudicial. Steven further responds by noting that there was nothing unduly prejudicial about subparagraphs 4 and 5. He notes that in order to be unduly prejudicial, an instruction must repeat a defense or claim favorable to one party in such a fashion as to be unfair. Steven asserts subparagraph 5 amounts to clarification of what must be shown to prevail on an undue influence claim. In addition, Steven claims William’s objection was not specific enough to alert the district court t o the issues raised on appeal. Steven
also cross

- appeals, contending he was entitled to a directed verdict o n the undue influence claim. Because of our disposition, we need not
address these issues.11

C
. Iowa Cas elaw on Undue Influence.
1. Standard of proof. The earliest Iowa undue influence cases embraced a preponderance

- of

- the

- evidence standard. See Webbe r v. Sullivan , 58 Iowa 260, 267, 12 N.W. 319, 323 (1882) (approving undue influence instruction using a preponderance

- of

- the

- evidence standard );
McIntire v

. McConn , 28 Iowa 480, 485

– 86 (1870) (noting the preponderance of evidence was against a finding of undue influence); see also Jamison v. Jamison , 113 Iowa 720, 723, 84 N.W. 705, 706 (1900) (rejecting “ clear, satisfactory, and convincing ” standard in law action against estate to enforce promises under will). I n In re Townsend’s
Estate , 128 Iowa 621, 624 , 105 N.W. 110 , 110

– 11 (1905), however, the
court applied a heightened standard of proof , holding that , at least where the testator was of sound mind and not an easily influenced individual,
the required showing was one of clear and convincing evidence of undue
influence.
After Townsend ’s Estate , however, we ge nerally applied a preponderance

- of

- the

- evidence standard f or claims of undue influence.
See , e.g. , In re Behrend’s Will , 233 Iowa 812, 817, 10 N.W.2d 651, 654

– 55 (1943); In re Busick’s Will , 191 Iowa 524, 530, 182 N.W. 815, 818 ( 1921); Zinkula v. Zinkula , 171 Iowa 287, 299, 154 N.W. 158, 162 ( 1915);
Ross v. Ross , 140 Iowa 51, 57 , 117 N.W. 1105, 1107

– 08 (1908). Yet, there were at least two outliers

. See Arndt v. Lapel , 214 Iowa 594 , 606

– 07 , 243 N.W. 605, 610 (1932) (applying a “ clear , satisfactory, an d convincing ” standard to a claim that a grantee secured the transfer of a deed by undue influence ) ; McNeer v. Beck , 205 Iowa 196, 198 , 217 N.W. 825, 826 (1928) (same)

. Finally, in In re Estate of Todd , 585 N.W.2d 273, 275

– 77 & n.2 (Iowa 1998) , we explicitly disavowed the heightened standard of proof for12

undue influence claims in will contests

. W e canvassed the law of other jurisdictions and recognized that some states applied a heightened
stand ard in undue influence cases in probate, but noted the majority of states followed the preponderance standard. Id

. at 275

– 76. We noted that challenges to testamentary dispositions on the ground s of undue influence in probate in Iowa were , by statute , tri able as an action at law.
Id . at 275. We cited the longstanding rule in Iowa that “ ‘ in law cases questions of fact are to be determined from the preponderance of the
evidence. ’ ” Id . at 276 (quoting Jamison , 113 Iowa at 723, 84 N.W. at 706 ). We reasoned that because will contests in Iowa were actions at law where the preponderance

- of

- the

- evidence standard ordinarily applied, we would follow the majority rule. Id. We also expressly disavowed
Townsend ’s Estate to the extent it stood for a differe nt standard. Id. at 276 n.2. We reaffirmed, however, that if a confidential relationship existed between the testator and the putative beneficiary, the burden
shift ed “ to the recipient ‘ to establish by clear and convincing proof that the advantage was pr ocured without undue influence. ’ ” Id

. at 276 ( quoting In re Estate of Herm , 284 N.W. 2d 191, 200 (Iowa 1979))

. 2. Elements of u ndue i nfluence. While most Iowa cases reject a clear and convincing standard of proof generally for undue influence claims, I owa law has employed a heightened substantive standard for finding undue influence. In In re Ankeny’s Estate , 238 Iowa 754, 760, 28 N.W.2d 414 , 417 (1947), we cited with favor a note in the Iowa Law
Review as “set[ t ing] out clearly the rules which should govern” undue
influence claims . The n ote stated:

“ The four elements necessary to be proved in order to establish u ndue influence are as follows: (1) a person unquestionably subject to undue influence , (2) opportunity to exercise such influence and effect the wrongful purpose , (3) a13 disposition to influence unduly for the purposes of procuring an improper favor , and (4) a result clearly appearing to be the effect of the supposed influence. ”

Comments on Recent Cases , Wills

— When Undue Influence Becomes a Jury Question , 30 Iowa L

. Rev

. 321 , 322 (1945) (emphasis added) (quoting In re Leisch’s Will , 267 N.W. 268 , 271 (Wis. 1936))

. Thus, although most Iowa cases employed a preponderance

- of

- the

- evidence
standard as the burden of proof, the substantive requirements of the
claim de manded proof that a person was “ unquestionably ” subject to
influenc e and that the result clearly appeared to be the effect of undue
influence.
The requirement that a testator must be “ unquestiona bly ” sub ject
to undue influence was abandoned in Johnstone v. Johnstone , 190 N.W.2d 421 , 426 (Iowa 1971) , for a requirement that a testator be “susceptible to undue influence

. ” (Internal quotation marks omitted

. )
The Johnstone court noted the former phrase had been imported from Leisch’s Will , a 1936 Wisconsin Supreme Court case, but that the Wisconsin court did not repeat the qualification in later cases.
Johnstone , 190 N.W.2d at 425. The Johnstone court reasoned the language, if literally applied, would make it almost impossible to prove an
undue influence claim. Id

. While we have abandoned the requirement that a testator be “unquestionably” subject to undue influence, we ha ve not departed from the requirement th at the result in a will contest clearly show the effects
of undue influence. Prior to Estate of Todd , our caselaw repeated the “clearly ” requirement numerous times. See , e.g. , In re Estate of Bayer , 574 N

. W

. 2d 667, 67 1 (Iowa 1998); Estate of Dankbar , 43 0 N.W.2d at 128 ; Estate of Davenport , 346 N.W.2d at 532; Estate of Herm , 284 N.W.2d at 201 ; Frazier v. State Cent

. Sav

. Bank , 217 N.W.2d 238, 244 (Iowa 1974).14

In Estate of Todd , even though we rejected the higher standard of proof for will contests, we nonetheless continued to recognize as valid our
caselaw that declared an element of undue influence was a result that was “clearly the effect of undue influence.” 585 N.W.2d at 277 & n.4. Following these cases , Iowa Civil Jury Instruction No. 2700.4 requires
that the result be “clearly bro ug ht about by undue influence.”
3. Summary of Iowa caselaw . In sum, while recognizing the split in caselaw across the country, we have held that in a will contest where no fiduciary relationship is involved , undue influence must be proved by a preponderan ce of the evidence

. Id. at 2 75

– 7 7

. Though we have rejected the clear, satisfactory, and convincing standard of proof, we have
nonetheless held an element of undue influence is a “result clearly the effect of undue influence.” Id. at 277 & n.4; see also, e.g. , Ankeny’s
Estate , 238 Iowa at 760 , 28 N.W.2d at 417

. We have not regarded rejection of a clear, satisfactory, and convincing standard of proof as inconsistent with this heightened “clearly” causation requirement in
undue influence cases. See Estate of Todd , 5 85 N.W.2d at 277

. D. Case l aw on Undue Influence from Other States.
1. Standard of p roof. As indicated in Estate of Todd , mo st states apply a preponderance

- of

- the

- evidence standard to undue influence
claims. See , e.g. , Rose v. Dunn , 679 S.W.2d 180, 182 (Ark. 1984); Lamborn v. Kirkpatrick , 50 P.2d 542, 544 (Colo. 1935); In re Estate of
West , 522 A.2d 1256, 1264 (Del. 1987); Caranci v. Howard , 708 A.2d 1321, 1324 (R.I. 1998); In re Estate of Duebendorfer , 72 1 N.W.2d 438, 446 (S.D. 200 6); In re Estate of Waters , 629 P.2d 470, 473 (Wyo. 1981) ; see also In re Estate of Cooch , 116 N.W.2d 740, 743 (Mich. 1962) (requiring “evidence of probative force beyond mere suspicion ”); Ross & Reed § 7 : 11 n.3 (citing cases holding a will contestant must prove undue15

influence by a preponderance of the evidence). The preponderance

- of

the

- evidence standard is defended on the ground it is the same standard generally applied in civil actions. See In re Estate of Otto , 494 N.W.2d 169, 173 (N.D. 1992) (“The g overning standard for undue influence challenges, as with most civil matters, is a preponderance of the evidence.”); see also Hack v. Janes , 878 So. 2d 440, 444 (Fla. Dist. Ct. App. 1997) (“Absent clear direction from the Legislature, we find no
reason to devia te from that standard here.”). There is a contrary minority view . Some states heighten the standard and require contestants to prove their claim by clear and convincing evidence. See, e.g. , Estate of Langley , 586 A.2d 1270, 1271 (Me. 1991); In re Davis’ Will , 101 A.2d 521, 522 (N.J. 1953); Chapman v.
Varela , 213 P.3d 1109, 1114 (N.M. 2009); In re Estate of Hamm , 227 N.W.2d 34, 35 (Wis. 1975) ; see also Ross & Reed § 7: 11 n. 4 (citing cases holding a will contestant must prove undue influence by clear and convincing evidence). In In re Estate of Bennett , 865 P.2d 1 0 62 , 1068 (Kan. Ct. App. 1993), the court explained the rationale underlying the application of a clear

- and

- convincing

- evidence standard to an undue
influence claim is that a will is presume d valid and should be overcome only upon a substantial showing. The court also characterized undue
influence a s a species of fraud, which ordinarily requires a higher
standard of proof. Id

. at 1069. A somewhat different rationale for a heightened standar d was expressed in Taylor v. Commissioner of Mental Health & Mental
Retardation , 481 A.2d 139 , 141 (Me. 1984), a case involving the question of the approp riate standard for release of a defendant found not guilty by reason of insanity. T he court emphasized the purpose of a standard of proof is to “ ‘ instruct the factfinder concerning the degree of confidence16

our society thinks he should have in the correctness of factual conclusions for a particular type of adjudication

. ’ ” Id . at 150 ( q uoting In re Winship , 397 U.S. 358, 370, 90 S. Ct. 1068, 1076, 25 L. Ed. 2d 368,
379 (1970) (Harlan, J., concurring)). Thus, the standard of proof results “from a reasoned balancing of all the interests, public and private, that are implicated in the part icular factual determination.” Id. Hawaii employs a mixed approach . Generally, the standard of proof in an undue influence case is a preponderance of the evidence. In re Estate of Herbert

, 979 P.2d 39, 51 (Haw. 1999). If, however, the undue
influence is shown by circumstantial evidence, “the indirect evidence must be of a clear and convincing character.” Id

. at 53 ( c itation and internal quotation marks omitted). Finally, in as many as thirteen jurisdictions, there appears to be
no caselaw articulatin g the standard of proof in undue influence cases involving wills. See Ross & Reed § 7: 11 n. 5. In some jurisdictions, courts have adopted language other than a preponderance of the
evidence or clear and convincing evidence to describe the necessary
standard of proof. For instance, one appellate court has stated the evidence must be “of sufficient character, substance, and weight to furnish a firm foundation for a jury’s verdict.” Fis c her v. Heckerman , 772 S.W.2d 642, 646 (Ky. Ct. App. 1989). What such a vague phrase means is unclear, but such phrases are designed to weed out cases appellate courts regard as simply too speculative to support relief.
2. Elements of undue i nfluence. Many states have tried to identify elements or factors supporting a claim of undue influence to set aside a will, with variations from state to state. See Ross & Reed § 7 : 2

. Some states have approached the problem with a flexible factor test reminiscent of the equitable origins of undue influence rather than a17

more str uctured approach involving mandatory legal elements. See , e.g. , Crittell v. Bingo , 36 P.3d 634, 639 (Alaska 2001) (listing various factors to consider); Mullin v. Brown , 115 P.3d 139, 144 (Ariz

. Ct

. App

. 2005) (listing eight factors); Bye v. Mattingly , 975 S.W.2d 451, 457 (Ky. 1998) (establishing seven “badges” of undue influence); Ruestman v

. Ruestman , 111 S.W.3d 464, 479 (Mo. Ct. App. 200 3 ) (identifying fact ors to be taken into account); In re Estate of Eggebrecht , 967 P.2d 388, 391 (Mont. 1998) (ind icating court should take into account all surrounding circumstances).
In those states that establish elements of undue influence , a majority does not contain a requirement that the will clearl y be the result
of undue influ ence and instead simply require that the will was the
result of undue influence. See , e.g. , Dinan v. Marchand , 903 A.2d 201,
204 n.1 ( Conn . 2006) ; Gmeiner v. Yacte , 592 P.2d 57, 63 (Idaho 1979) ; In re Estate of Bacon , 645 N.Y.S.2d 1016, 1019 (Su r . Ct. 1996) ; In re Will of Campbell , 573 S.E.2d 550, 560 (N.C. Ct. App. 2002); In re Estate of Dion , 623 N.W .2d 720, 728 (N.D. 2001); West v. Henry , 184 N.E.2d 200, 202 (Ohio 1962) ; Rothermel v. Duncan , 369 S.W.2d 917, 922 (Tex

. 1963)

. There are, however, other Midwestern states that adopt the same approach as Iowa . In a long line of cases, the South Dakota Supreme Court, citing established precedent, found undue influence in a will contest required “a result clearly showing the effect s of undue influence.”
See , e.g. , Stockwell v. Stockwell , 7 90 N.W.2d 52, 64 (S.D. 2010); In re Estate of Pringle , 751 N.W.2d 277, 291 (S.D. 2008); Estate of Duebendorfer

, 721 N.W.2d at 446 ; In re Estate of Schnell , 683 N.W.2d
415 , 421 (S.D. 200 4 ); In re Estate of Holan , 621 N.W.2d 588, 592 (S.D. 2001); In re Estat e of Dokken , 604 N.W.2d 487, 495 (S.D. 2000); In re Estate of Elliott , 537 N.W.2d 660 , 663 (S.D. 1995); In re Estate of Smith ,18

520 N.W.2d 80, 85 n.2 (S.D. 1994); In re Estate of Till , 458 N.W.2d 521 , 525 (S.D. 1990); In re Estate of Zech , 285 N.W.2d 236 , 240 (S.D. 1979); In re Estate of Landeen , 264 N.W.2d 521 , 523 (S.D. 1978); In re Estate of
Anders , 226 N.W.2d 170 , 174 (S.D. 1975); In re Estate of Metz , 100 N.W.2d 393 , 394 (S.D. 1960). The Supreme Court of Nebraska has taken a similar approach.
See , e.g
. , In re Estate of Hedke , 775 N.W.2d 13, 28 (Neb. 2009); In re Estate of Novak , 458 N.W.2d 221 , 224 (Neb. 1990); In re Estate of
Peterson , 439 N.W.2d 51 6 , 520 (Neb. 1989); In re Estate of Villwok , 413 N.W.2d 921, 924 (Neb. 1987); In re Estate of Price , 388 N.W.2d 72, 79 (Neb

. 1986); In re Estate of Gloe , 215 N.W.2d 98, 10 1 (Neb. 1974); In re Estate of Gorthy , 100 N.W.2d 857, 864 (Neb. 1960); In re Bainbridge’s
Estate , 36 N.W.2d 625 , 626 (Neb. 1949); In re Bowman’s Estate , 9 N.W.2d 801, 806 (Neb. 1943)

. Notably, both Nebraska and South
Dakota , like Iowa, employ a preponderance

- of

- the

- evidence standard to
undue influence claims in will contests when no fiduciary relationship is present

. See , e.g. , Estate of Price , 388 N.W.2d at 76

– 77; Estate of Holan , 621 N.W.2d at 591. Older Wisconsin cases also require a result clearly appearing to be the effect of the supposed influence. See, e.g. , In re Estate of Komarr , 175 N.W.2d 473, 477

– 78 (Wis. 1970); In re Will & Estate of Freitag , 101 N.W.2d 108, 109 (Wis. 196 0); In re Beyer’s Estate , 55 N.W.2d 401 , 403 (Wis. 1952); In re Feeley’s Estate , 33 N.W.2d 139 , 142 (Wis. 1948); In re King’s Will , 29 N.W.2d 69 , 72 (Wis. 1947); In re Faulks’ Will , 17 N.W.2d
423 , 440 (Wis. 1945); In re Scherrer’s Estate , 7 N

. W

. 2d 848 , 853 (Wis. 1943); In re Raasch’s Will , 284 N

. W

. 571 , 575 (Wis. 1939); Leisch’s Will , 267 N.W. at 271 ; In re Schaefer’s Estate , 241 N.W. 382 , 385 (Wis. 1932). Later cases, however, seem to abandon the requirement , s ee, e.g. , In re19

Estate of Dejmal , 289 N.W.2d 813, 819 (Wis. 1980) (requiring “a result caused by, or the effect of such undue influence”) , perhaps because Wisconsin has adopted a cl ear

- and

- convincing

- evide nce standard for undue influence claims, s ee, e.g. , In re Estate of Sensenbrenner , 278 N.W.2d 88 7, 890 (Wis. 1979) (requiring the presumption of a valid will to be overcome by clear, satisfactory, and convincing evidence of undue influence)

. E
. Secondary Authority on Undue Influence.
1. Burden of proof. The Restatement (Third) of Property provides that the burden of establishing undue influence rests on the party contesting the validity of the donative transfer. Restatement (Third) of Property: Wills and Other Donative Transfers § 8.3 cmt. b , at 144 (2003) [hereinafter Restatement (Third)]

. The comment does not, however, address the appropriate standard of proof for that burden. Similarly, the Uniform Probate Code provides that contestants of a will have the burden of establishing undue influence, but does not indicate the appropriate
sta ndard

. Unif. Probate Code § 3

- 407 (amended 2010 ) , 8 (II) U.L.A. 95 (2013). A leading treatise declares that “[ i ] t is usually said ” that the burden of proof is on the party alleging the undue influence by a preponderance of the evidence. 3 William J. Bow e & Douglas H. Parker, Page on the Law of Wills § 29.79, at 696 (2004 ) . Another treatise simply declares the burden of proving undue influence is on the contestant. William M. McGovern, Sheldon F. Kurtz, & David M. English, Principles of Wills, Trusts & Estates § 7.3, at 359 (2d ed. 2012 ) [ hereinafter Principles of Wills, Trusts & Estates ]

. 2. Elements of undue i nfluence. We begin our review of secondary authority of elements of undue influence by considering the Restatement (Third)

. S ection 8.3 of t he Restatement (Third) considers claims of undue20

influence, duress, or fraud. See Restatement (Third) § 8.3, at 143

– 44. Section 8.3 generally provides that a donative transfer can be found to have been procured by undue influence where it is shown that “ such
influence

. . . overcame the donor’s free will and caused the donor to
make a donative transfer that the donor would not otherwise have
made

. ” Id. § 8.3, at 143.
Comment e addresses cases where, as is often true , there is no
direct evidence of undue influence and the claim must be proven through
circumstantial evidence

. See id. § 8.3 cmt. e , at 145. Comment e recites traditional elements of undue influence, including a causation element that “there was a result appearing to be the effect of the und ue influence.” Id. The term “clearly” does not appear in the comment. However, there is authority applying an approach similar to that in Ankeny ’s Estate . For instance, the annotation appearing at 79 Am. Jur. 2d Wills § 359 , at 576

– 77 (2013) states the eleme nts of undue influence
include: (1) the decedent’s susceptibility to undue influence; (2) opportunity to exert such influence; (3) a disposition to do so for an improper purpose; and (4) a result clearly showing the effects of und ue influence. (Emphasis added.) Similarly, 95 C.J.S. Wills § 375 , at 335 (201 1 ) states the fourth ele ment of undue influence is that “ the result

— reflected in the
will

— was clearly the effect of undue i nfluence .” (E mphasis added

. ) One
treatise also declares a contestant must prove that “the will reflects a disposition clearly appearing to be th e product of the undue influence.” Principles of Wills, Trusts, and Estates § 7.3, at 354

– 55 (emphasis added)

. 3. The case for a bandonment . While conventional lega l authorities debate the nuances, critics of undue influence in wills have recently been energized. At least one ha s called for abandonment of the doctrine21

altogether. See generally Carla Spivack, Why The Testamenta ry Doctrine of Und ue Influence Should Be Abolished , 58 U

. Kan

. L

. Rev

. 245 (2010) [hereinafter Spivack] . While no one in this litigation is calling for such a radical step, the underlying critique of the doctrine may shed some light

o n the less draconian choices presented in this case.
The case for abandonment note s , as a general matter, that courts have failed to provide any standard of clarity, fairness, or predictability
that a legal doctrine should provide. E.g. , id. at 246. According to one commentator, the undue infl uence doctrine “ostensibly safeguards testamentary freedom” yet determinations “often are more dependent on courts’ normative views of the relationships be tween the testator, beneficiary and contestant than by the actual presence or absence of
factors ofte n deemed indicative of undue influence.” Leslie, 38 Ariz. L.
Rev. at 2 44

– 45 . In short, because of its spongy character, it has been argued the law of undue influence may undermine testamentary freedom in order to pro mote social goals thought to be desirable. Id. at 236

– 37;
see also Spivack at 248, 298.
F. Resolution of Issues in this Case
. 1. Burden of proof to be employed. We first consider the substantive question of whether the court’s instruction that causation must be clearly proved is consistent with Iowa law. Pursuant to Iowa Rule of Civil Procedure 1.924, the district court must “instruct the jury as to the law applicable to all material issues in the case.” The instructions “ ‘must convey the applicable law in such a way that the jury has a clear understanding of the issues it must decide.’ ” Boyle v.
Alum

- Line, Inc. , 710 N. W .2d 741, 748

– 49 (Iowa 2006) (quoting Thompson v. City of Des Moines , 564 N.W.2d 839, 846 (Iowa 1997)). William challenges the “clearly” requirement in Instruction No. 2 as inconsistent22

with the established Iowa law that a preponderance of the evidence is the

a ppropriate standard to prove undue influence

. Certainly William is correct in asserting that we have repeatedly held the standard of proof in undue influence cases is a preponderance
of the evidence. See, e.g. , Estate of Todd , 585 N.W.2d at 275

– 76. However, we have also repeatedly held the fourth element of an undue
influence claim , causation, must be clearly proved. See , e.g. , id. at 277 n.4; Ankeny’s Estate , 238 Iowa at 760, 28 N.W.2d at 417. The question arises whether t hese two concepts can coexist. In Estate of Todd , we found no inconsistency in gen erally applying a preponderance

- of

- the

- evidence standard to the elements of undue influence, but at the same ti me requiring that causation be clearly
established. 585 N.W.2d at 277 & n.4. The c ases since Estate of Todd have applied our established undue influence law. The courts of
Nebraska and South Dakota have adopted a similar ap proach. See, e.g. , Estate of Price , 388 N.W.2d at 76

– 77; Estate of Holan , 621 N.W.2d at
591

– 92

. There is at least some support for the approach in secondary commentary

. In light of Estate of Todd , the authorities in South Dakota and Nebraska, and the supportive authorities, we conclude a requirement that causation be clearly established is not inconsistent
with the preponderance

- of

- the

- evidence standard generally applying to the other elements of un due influence. The question remains, however, whether we should abandon the “clearly” requirement in causation. We decline to do so. A heightened
causation element in undue influence cases makes sense. In cases involving challenges to wills based upon undue influence, the central issue is whether the acts of the testator were a product of free will or coercion. The testator, however, is not available to testify and, as a23

result, a speculative element is necessarily introduced into the claim. As
colorf ully noted in the commentary, will contests necessarily apply a “worst evidence” rule. Langbein, 103 Yale L.J. at 2044. Further, it is not always easy to distinguish ordinary permissible
influences on a te stator from improper coercion. The injection of the word “clearly” into the fourth element of undue influence is designed to add a measure of protection to the free will of a testator, filter out claims that are unduly speculative, and to prevent the doctrine from expanding beyond its limited scope. Al l of the other elements of undue influence might be present

— susceptibility, opportunity, and disposition

— and , still , the will provisions might be the resu lt of the testator’s free will. The heightened causation requirement of “clearly” ensures the
other f actors really mattered to the end result. As we noted in Estate of Davenport , weak circumstantial evidence that at most raises the possibility of influence is not sufficient. 346 N.W.2d at 532. We quoted at length from a leading Iowa probate treatise, w hich stated:

“ It is not sufficient that persuasion alone was asserted against the testator. The courts have rightly recognized that most persons assert some influence over other s , through friendship or familial duties, which may have some tangenti al effec t on their receiving a testamentary benefit. This influence is not tainted. Rather, undue influence must dominate the motives of the testator in ex e cuting his w ill. It must be equivalent to ‘ moral coercion. ’ ”
Id. (quoting 1 Kurtz § 4.45, at 175 ) . The “clearly” requirement in our law helps prevent our undue influence doctrine from being over inclusive, as
i t will tend to deter juries from finding undue influen ce merely because they disagree with the terms of a will. We recognize that many other jurisdictions reach this result by applying a clear and convincing evidentiary standard with respect to all elements of undue influence. We rejected that approach in Estate of24

Todd. 585 N.W.2d at 277. Neither party asks us t o revisit the issue. In any event, we think it permissible to heighten the plaintiff’s burden through the substance of an elements

- based instruction. Our case law recognizes that will contests , by statute , are actions at law, which means jury trials are a vailable and the applicable standard of review is a preponderance of the evidence. Yet, by judicially establishing a somewhat higher causation standard, we increase the likelihood that specious undue influence claims are weeded out.
We do not think the i nstruction is so conf using as to require
reversal. The instruction required that in order to succeed , William had
to prove his undue influence claim by a preponderance of the e vidence.
One of the elements

— causation

— requires clear proof. We think a

reaso nable jury would understand that it must find by a preponderance
of the evidence that the changes were clearly the result of undue
influence.
2. Repetition

. We now turn to the issue of whether the instruction was unduly repetitive. Instructions may not give undue prominence to
certain evidence involved in the case. E.g. , State v. Marsh , 392 N.W.2d 132, 133 (Iowa 1986); see also 7 5A Am. Jur. 2d Trial § 981, at 618

– 19 (2007 ). Further, instructions may not repeat even correct statements of law to the poi nt of undue emphasis. E.g. , Andrews v. Struble , 178 N.W.2d 391, 400 (Iowa 1970). In sum, t he bottom line is that the instructions must not “give undue prominence to any particular aspect of a case,” Vachon v. Broadlawns , 490 N.W.2d 820, 822 (Iowa 1992), which may include a “particular theory, defense, stipulation, burden of proof, or piece of evidence,” Olson v. Prosoco, Inc. , 522 N.W.2d 284, 287 (Iowa 1994). William asserts that by instructing the jury regarding the
causat ion element of undue influence in both subparagraphs 4 and 5,25

the instruction was flawed as unduly emphasizing certain evidence in the

case. W e have on a number of occasions found instructions that unduly emphasiz ed certain evidence were flawed and requir ed reversal. For example, i n C larke v. Hubbell , 249 Iowa 306, 315

– 16 , 86 N.W.2d 905,
910

– 11 (1957), we found that the district court, by repeating time and again the principle that a city was not an insurer for all injuries that occurred on its premises , committed reversible error. By its frequent repetition of a limiting concept in the law, the court gave undue emphasis to a potential defense in the case.
In Andrews , however, we found instructions were not repetitious where one instruction informed the jury that if it found the neglig ence of the defendant and other persons proximately caused the plaintiff’s injury, the concurring negligence would not affect the plaintiff’s right to recover solely from the defendant , and a second instruction informed the jury that if it found the defend ant’s negligence was the sole proximate cause of the injury, the plaintiff was entitled to recover. 178 N.W.2d at 400. We noted that while the latter statement may have been repetitious, the statement “was of some aid in clarifying the requirement of pro ximate cause.” Id.
This case is more like Andrews than Clarke . Subparagraphs 4 and 5 did not contain the type of pointless repetition found in Clarke

. Subparagraph 4 provided instructions related to the definition of undue
influence not contained in su bparagraph 5, and subparagraph 5 provided an additional legal requirement not contained in subparagraph
4

— namely, that the evidence must show that cha nges in the trust
document were “clearly the result of the foregoing circumstances.” While the instructions overlap to some degree, that is often the case in jury26

instructions th at build upon concepts of law. Further, a single repetition coupled with a clarification of the law does not amount to error. Id.
IV. Conclusion.
For the abov e reasons, we vacate the decision of the court of appeals and affirm the judgment of the district court. Further, because of our resolution of this case, we need not address Steven’s cross

- appeal.
DECISION OF COURT OF APPEALS VACATED ; DISTRICT
COURT JUDG MENT AFFIRMED.