Zagg Inc. v. TX Trading, Inc. et al

UNITED STATES DISTRICT COURT
SOUTHERN DISTRICT OF FLORIDA
CASE NO. 23-cv-20304-ALTMAN/Reid
ZAGG INC.,
Plaintiff,
v.
MENACHEM MENDEL ICHILEVICI, et al.,
Defendants.
_____________________________________/
DVG TRADE LLC,
Counter-Plaintiff,
v.
ZAGG INC., et al.,
Counter-Defendants.
_____________________________________/
ORDER ON ZAGG’S
DAUBERT MOTION
Our Plaintiff, ZAGG, Inc., has filed a Daubert motion asking us to exclude the report and
testimony of DVG Trade LLC’s Amazon policy expert, Rachel Johnson Greer. See generally Plaintiff’s
Motion to Exclude the Report of DVG’s Expert (the “Motion”) [ECF No. 306].1 After careful review,
we DENY the Motion.2
1 Although we allowed ZAGG to file its Daubert Motion under seal, see Paperless Order Granting
Motion to Seal [ECF No. 302], our Order won’t explicitly reference any confidential information and
thus won’t be filed under seal.
2 The Motion has been fully briefed and is ripe for adjudication. See DVG’s Opposition to ZAGG’s
Daubert Motion (“Response”) [ECF No. 328]; ZAGG’s Reply in Support of Daubert Motion (“Reply”)
[ECF No. 336].
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T HE L AW
“Federal Rule of Evidence 702, as explained by the Supreme Court in Daubert v. Merrell Dow
Pharmaceuticals, Inc. and its progeny, controls determinations regarding the admissibility of expert
testimony.” City of Tuscaloosa v. Harcros Chemicals, Inc., 158 F.3d 548, 562 (11th Cir. 1998). “The burden
of laying the proper foundation for the admission of the expert testimony is on the party offering the
expert, and admissibility must be shown by a preponderance of the evidence.” Allison v. McGhan Med.
Corp., 184 F.3d 1300, 1306 (11th Cir. 1999). “The presumption is that expert testimony is admissible,
so that once a proponent has made the requisite threshold showing, further disputes go to weight, not
admissibility.” City of S. Miami v. Desantis, 2020 WL 7074644, at *3 (S.D. Fla. Dec. 3, 2020) (Bloom, J.)
(quoting Little v. Wash. Metro. Area Transit Auth., 249 F. Supp. 3d 394, 408 (D.D.C. 2017)).
“To determine whether expert testimony or any report prepared by an expert may be admitted,
the Court engages in a three-part inquiry, which includes whether: (1) the expert is qualified to testify
competently regarding the matters he intends to address; (2) the methodology by which the expert
reaches his conclusions is sufficiently reliable; and (3) the testimony assists the trier of fact, through
the application of scientific, technical, or specialized expertise, to understand the evidence or to
determine a fact in issue.” Johnson v. Carnival Corp., 533 F. Supp. 3d 1196, 1199 (S.D. Fla. 2021) (Bloom,
J.) (citing City of Tuscaloosa, 158 F.3d at 562). “The Court of Appeals for the Eleventh Circuit refers to
each of these requirements as the ‘qualifications,’ ‘reliability,’ and ‘helpfulness’ prongs.” Id. at 1200
(quoting United States v. Frazier, 387 F.3d 1244, 1260 (11th Cir. 2004)).
When it comes to qualifications, an expert may be qualified “by knowledge, skill, experience,
training, or education.” J.G. v. Carnival Corp., 2013 WL 752697, at *3 (S.D. Fla. Feb. 27, 2013)
(Rosenbaum, J.) “The qualification standard for expert testimony is not stringent, and so long as the
expert is minimally qualified, objections to the level of the expert’s expertise go to credibility and
weight, not admissibility.” Vision I Homeowners Ass’n, Inc. v. Aspen Specialty Ins. Co., 674 F. Supp. 2d
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1321, 1325 (S.D. Fla. 2009) (Dimitrouleas, J.) (cleaned up). When assessing the reliability of a non-
scientific expert (like Greer), we have “considerable leeway” and “may decide that non-scientific
expert testimony is reliable based upon personal knowledge or experience.” United States v. Jennings,
599 F.3d 1241, 1248 (11th Cir. 2010). In evaluating reliability, we rely “solely on [the] principles and
methodology [employed by the expert], not on the conclusions that they generate.” Allison, 184 F.3d
at 1312 (citing Daubert, 509 U.S. at 595). Finally, expert testimony is helpful if it applies to “matters
that are beyond the understanding of the average lay person.” Edwards v. Shanley, 580 F. App’x 816,
823 (11th Cir. 2014). “Proffered expert testimony generally will not help the trier of fact when it offers
nothing more than what lawyers for the parties can argue in closing arguments.” Frazier, 387 F.3d at
1262–63.
A NALYSIS
ZAGG asks us to exclude the expert report of Rachel Johnson Greer (the “Greer Report”)
[ECF No. 306-1] and to preclude her from testifying as an expert at trial. DVG—the proponent of
Greer’s testimony—responds that Greer is a “noted Amazon expert” who, “based on her experience,
will rebut evidence that ZAGG intends to intrude [sic] as part of ZAGG’s case in chief[.]” Response
at 6. Specifically, DVG wants to have Greer “provide the necessary background on the relevant
Amazon practices, policies and procedures.” Ibid. In ZAGG’s view, though, Greer isn’t qualified to
testify about Amazon’s policies, hasn’t “reliably applied” her experience, “provide[s] nothing helpful
to assist the trier of fact,” and offers testimony that’s rife with “inadmissible hearsay.” Motion at 12–
20. We’ll address—and reject—each of these arguments in turn.3
3 ZAGG’s Motion conflates the qualifications and reliability prongs of Rule 702. See Motion at 11
(“[Section] II. Greer’s ‘Opinions’ Lack Reliability and She is Not Qualified to Offer Opinions on
Amazon Policies or How Amazon Operates”). Because qualifications and reliability are “distinct
concepts,” which “the courts must take care not to conflate,” Frazier, 387 F.3d at 1260, we’ve tried
our best to separate ZAGG’s qualifications and reliability arguments.
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I. 	Qualifications
In the first step of our Daubert analysis, we must determine whether Greer is “qualified to
testify competently regarding the matters [she] intends to address.” Johnson, 533 F. Supp. 3d at 1199.
ZAGG claims that Greer is “an unqualified and unreliable witness [ ] as to Amazon’s current processes
and policies (or any policies after she left in 2017).” Motion at 14. DVG responds that “ZAGG cannot
reasonably challenge Ms. Greer’s qualifications—she has over 15 years of direct experience working
with Amazon and Amazon sellers.” Response at 14.
We’ve reviewed Greer’s CV and agree that she’s qualified to opine on Amazon’s policies and
procedures. Greer’s CV demonstrates that she: (1) worked as a Program Manager at Amazon for five
years, overseeing various elements of Amazon’s compliance programs; (2) has served as an Amazon
compliance consultant since 2015; (3) received a Master of Business Administration degree from
Seattle University; (4) published a book on Amazon product safety; and (5) appeared as an “Amazon
Product Compliance” speaker at various events from 2016 to 2022. Greer CV [ECF No. 311-1] at 29–
40; see also Greer Report at 2 (detailing Greer’s qualifications).
An individual with ample experience in a field can qualify as an expert in that field’s practices,
policies, and standards. See Am. Gen. Life Ins. Co. v. Schoenthal Fam., LLC, 555 F.3d 1331, 1338–39 (11th
Cir. 2009) (finding an expert qualified to testify regarding “insurance industry standards” based on his
“ample knowledge and experience about the subject”—as demonstrated by his work as a “paid
consultant to various life insurance companies regarding the issuance of multi-million dollar life
insurance policies”); see also Jennings, 599 F.3d at 1249 (finding an expert’s testimony on “the substantive
requirements of state workers’ compensation law and the general knowledge in the industry of those
requirements” admissible when it was based on the expert’s “experience and conversations over her
career with workers’ compensation professionals”). Here, Greer’s experience both as a manager at
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Amazon and as a consultant to Amazon sellers qualifies her as an expert in the field of “Amazon policy
compliance.”
Despite Greer’s demonstrated experience in the Amazon marketplace, ZAGG attacks her
qualifications in four ways. First, ZAGG claims that none of Greer’s roles at Amazon “involved any
of the issues or policies at issue in this case.” Motion at 15. But that’s not entirely true. Greer
“investigated sellers and vendors for safety and intellectual property infringement,” “managed quality
& compliance for Amazon’s own brands,” and “managed the legal compliance of all global imports,”
Greer Report at 3—all relevant to the claims at issue in our case.
Second, ZAGG contends that Greer isn’t qualified because she hasn’t worked at Amazon since
2017 and thus (ZAGG says) isn’t familiar with Amazon’s “current processes and policies.” Motion at
15. But ZAGG hasn’t cited any authority for the proposition that an expert must be currently (or even
recently) employed by a company whose policies he or she intends to outline. And DVG cites several
cases in which an expert’s testimony was deemed admissible even though the expert never worked at the
company in question. See, e.g., Buonomo v. JetBlue Airways Corp., 2023 WL 8878554, at *4 (S.D. Fla. Dec.
22, 2023) (Reid, Mag. J.) (permitting a flight attendant who never worked at JetBlue to testify that
“JetBlue itself did not have the proper policies in place”); Furnituredealer.net, Inc. v. Amazon.com, Inc.,
2022 WL 891462, at *17 (D. Minn. Mar. 25, 2022) (admitting testimony about Amazon’s internal
search engine from an expert who never worked at Amazon). That Greer hasn’t worked at Amazon
since 2017 doesn’t preclude us from finding that she’s qualified to testify about Amazon’s policies—
especially since she’s continuously advised Amazon sellers about these policies in the years since her
departure.4
4 Of course, if it becomes clear at trial that Amazon’s policies have changed materially since Greer was
there—and that Greer lacks personal familiarity with those changed policies—then we may take
another look at this argument.
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Third, ZAGG insists that “[o]nly Amazon itself can testify as to its practices and procedures.”
Motion at 14. But that’s absurd. As we’ve just observed, courts routinely allow experts who are
unaffiliated with a company to testify about that company’s policies or practices if those experts are
otherwise qualified to do so. To the extent ZAGG thinks that Amazon would be a better witness, it
hasn’t identified any authority (nor are we aware of any) that requires us to exclude an expert’s
testimony simply because a better witness might have been found. So, we’ll allow Greer to testify and
grant ZAGG wide latitude in cross-examining her on the extent of her expertise. See Daubert v. Merrell
Dow Pharms., Inc., 509 U.S. 579, 596 (1993) (“Vigorous cross-examination, presentation of contrary
evidence, and careful instruction on the burden of proof are the traditional and appropriate means of
attacking shaky but admissible evidence.”); see also United States v. Williams, 865 F.3d 1328, 1340 (11th
Cir. 2017) (“The district court acted within its discretion in determining that, given Tirado’s extensive
training and experience, any quarrels with his qualifications were fodder for cross examination rather
than reason to exclude his testimony altogether.”)
Finally, ZAGG claims that Greer is impermissibly trying to “testif[y] on behalf of Amazon[.]”
Motion at 12 (emphasis removed); see also id. at 12–13 (“The following ‘opinions’ of Ms. Greer are
nothing more than her unsupported, speculative guesses and assumptions as to how Amazon might
testify as to contested issues in this case[.]”). Again, though, that’s just not true. The Greer Report
makes clear that Greer is offering her perspective on Amazon’s policies and practices as an expert
who’s navigated the Amazon marketplace for years. See Greer Report at 5 (“My opinions in this case
are based on my experience working at Amazon and in my Amazon consulting business, Amazon
policy documents, publicly available listings of ZAGG products on Amazon.com, and my review of
certain documents provided to me by DVG[.]”). Nothing in her report even suggests that she’s
purporting to speak for Amazon itself.
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Since ZAGG hasn’t given us any reason to believe that Greer is unqualified to serve as an
expert in this case, we’ll deny this aspect of its motion.
II. 	Reliability
Next, we must determine whether the “methodology by which [Greer] reaches [her]
conclusions is sufficiently reliable.” Johnson, 533 F. Supp. 3d at 1199. ZAGG urges us to ask ourselves
“(1) whether the expert’s methodology has been tested or is capable of being tested; (2) whether it has
been subjected to peer review and publication; (3) the known or potential error rate; and (4) whether
it is generally accepted within the relevant field.” Motion at 16 (citing Seamon v. Remington Arms Co.,
LLC, 813 F.3d 983, 988 (11th Cir. 2016)). But that’s the framework that governs the reliability of
scientific experts. See, e.g., Schoenthal Fam., 555 F.3d at 1338 (“Standards of scientific reliability, such as
testability and peer review, do not apply to all forms of expert testimony. . . . A district court may
decide that nonscientific expert testimony is reliable based upon personal knowledge or experience.”);
Frazier, 387 F.3d at 1262 (“To evaluate the reliability of scientific expert opinion, we consider, to the
extent practicable: [the four factors ZAGG urges us to evaluate]. . . . [S]ometimes other questions may
be more useful.” (emphasis added)). Because Greer is a non-scientific expert testifying about her
experience, however, we instead ask only “how that experience leads to the conclusion reached, why
that experience is a sufficient basis for the opinion, and how that experience is reliably applied to the
facts.” FED . R. EVID . 702 advisory committee’s notes (2000 amends.); see also Jennings, 599 F.3d at 1248
(“For non-scientific expert testimony, the trial judge must have considerable leeway in deciding in a
particular case how to go about determining whether particular expert testimony is reliable. A district
court may decide that non-scientific expert testimony is reliable based upon personal knowledge or
experience.”).
ZAGG claims that Greer hasn’t “demonstrate[d] how her experience informs her opinions or
what methodology she relied upon in coming to [her] ‘opinions.’” Id. at 16. We disagree. Greer has
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shown that her opinions about Amazon’s policies and practices are based, in part, on her experience
“providing compliance guidance to Amazon sellers regarding Product Policy, Fulfilment by Amazon
(‘FBA’) compliance, Amazon’s intellectual property policies, and other Seller Performance issues,”
and 	“providing 	advisory 	services 	on 	meeting 	Amazon 	and 	regulatory 	product 	compliance
requirements for consumer goods[.]” Greer Report at 4. She also tells us that her “opinions in this
case are based on [her] experience working at Amazon and in [her] Amazon consulting business,
Amazon policy documents, publicly available listings of ZAGG products on Amazon.com, and [her]
review of certain documents provided to [her] by DVG[.]” Id. at 5. That’s more than sufficient for us
to find her report and testimony reliable under Rule 702. See Iaffaldano v. Sunwest Mortg. Co., Inc., 2018
WL 310050, at *2 (S.D. Fla. Jan. 4, 2018) (Rosenberg, J) (“Hager has substantial experience in the
insurance industry [ ]. His opinions, thus, are reliable based upon his knowledge and experience. He
need not have used a particular methodology in arriving at his conclusions.” (cleaned up)). Since
Greer’s proposed testimony is based on her personal experience working with Amazon’s quality-
control policies over many years, we deny this second aspect of ZAGG’s motion.
III. 	Helpfulness
We also ask whether Greer’s report and testimony would “assist[ ] the trier of fact, through
the application of scientific, technical, or specialized expertise, to understand the evidence or to
determine a fact in issue.” Johnson, 533 F. Supp. 3d at 1199. ZAGG argues that the Greer Report isn’t
helpful because it “contains exclusively fact testimony and is completely devoid of any opinions that
go beyond the understanding of an average layperson.” Motion at 18. ZAGG goes on to say that
“[t]he average layperson is at least similarly capable of reading, regurgitating, and interpreting alleged
Amazon policies in the same way as Ms. Greer.” Ibid. In support of this contention, ZAGG cherry-
picks a few paragraphs from the Greer Report that (it believes) demonstrate Greer’s mere
“reguritat[ion]” of Amazon’s policies. See, e.g., ibid. (“Ms. Greer [ ] simply provid[es] basic information
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about Amazon’s policies, often simply reciting the language. She states: ‘Specifically, Amazon’s policies
state that if any of the Brand’s products are sold by Amazon via Amazon retail, the Brand may not
sell those products via Seller Central in the Amazon Store.’” (citing Greer Report at 10)).
In Response, DVG argues that Greer does much more than just recite Amazon policies and
procedures. In saying so, DVG identifies several of Greer’s opinions that (it believes) will help the trier
of fact, including:
• 	Amazon public-facing policies “are often contradictory or outdated” because
“Amazon’s process for changing and updating policies, guidelines and other
seller documents on the Amazon Marketplace is a multi-step process that
requires internal tickets and up to six approvals[.]” (Greer Report ¶ 16);
• 	“Based on [her] experience at Amazon and in providing consulting services to
Amazon sellers, it has always been understood that a “new” item is simply one
that is brand-new and unused, free of blemishes, smudges or dirt, and in the
original packaging.” (Id. at ¶¶ 32–33);
• 	“When [she] was an AmazonBasics manager in 2012-2014, [she] calculated 11
touch points where a package could be damaged by Amazon’s or a shipping
carrier’s systems from the time that an AmazonBasics product arrived at
Amazon’s facilities until it reached the customer.” (Id. at ¶ 35);
• 	“Amazon 	uses 	computer 	algorithms,” 	assessing 	factors 	such 	as 	“good
performance metrics, popular products, and longevity on the Marketplace” to
determine which sellers are awarded better placement. (Id. at ¶¶ 41–42);
• 	“A long-term seller, with a good seller feedback rating going back several years,
will get more of the buy box than a new seller with limited or short term
feedback, even if the feedback is quite good.” (Id. at ¶ 45)[.]
Response at 21 (cleaned up). We agree with DVG that Greer’s report and testimony go well beyond
a mere recitation of Amazon’s policies and that her expert analysis of Amazon’s policies and practices
would assist the trier of fact. We thus deny this third aspect of ZAGG’s motion.
IV. 	Opinions & Hearsay
Finally, ZAGG advances two arguments that aren’t directly related to Greer’s admissibility as
an expert under Daubert. First, ZAGG says that “it is entirely unclear what ‘opinions’ are being offered
by Ms. Greer.” Motion at 9. ZAGG claims that the Greer Report is “a hodgepodge of speculative
factual assertions made by Ms. Greer masquerading as ‘opinions.’” Id. at 11. We disagree. For one
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thing, in making this argument, ZAGG identifies several of Greer’s specific opinions—thus belying
its claim that it has no way of knowing which opinions Greer plans to offer. See Motion at 9–10 (“Ms.
Greer testified that she is offering only two opinions. First, she testified that: ‘Accordingly, it is my
opinion that ZAGG’s conclusion that defendants cannot list ZAGG products as being in new
condition is based on an incorrect interpretation of Amazon’s policies that is not used by Amazon in
practice.’ Second, she testified that: ‘it is my opinion that defendants’ stickering of ZAGG products
comports with Amazon’s policy, as does the marking over the barcode on the lower left of the
packaging above.’” (cleaned up)). For another, Greer clearly sets out her opinions in the “Conclusion”
section of her report:
• 	As demonstrated above, ZAGG’s assertion that only those sellers that offer a
‘manufacturer’s warranty’ can list products as “New” on Amazon is incorrect. As
discussed, it is based on outdated Condition Guidelines, rather than the relevant
policies and Amazon’s actual practices.
• 	Similarly, ZAGG’s assertion that products sourced through liquidation cannot
be listed as “New” on Amazon is incorrect. As discussed, this assertion is
contrary to Amazon’s policies and Amazon’s routine business activities.
• 	Amazon’s Marketplace is deliberately set up to provide third party sellers the
opportunity to sell on a “Single Detail Page” (SDP) shared by all sellers of the
same product. DVG used that correct page, and did not make any duplicate
ASINs (an Amazon violation), or list on previously created duplicate ASINs, and
therefore followed Amazon policy correctly.
• 	ZAGG’s creation and operation of the Screenya storefront violated numerous
Amazon policies by, among other things, failing to disclose the true owner of the
account, failing to disclose the correct business address of the account owner,
operating simultaneously as a vendor and third-party seller, and submitting
fabricated invoices to Amazon.
• 	ZAGG has violated Amazon’s policies by misusing the variation feature for
SDPs.
Greer Report at 27–28. ZAGG’s objection thus has less to do with the clarity of Greer’s opinions and
(much) more to do with its view that Greer isn’t qualified to testify. See Motion at 11 (“Ms. Greer does
not offer opinions, but rather merely speculates as to what she thinks Amazon will do in a given factual
situation [and] provides unsupported factual information[.]”). As we’ve said, however, Greer is
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qualified to offer expert testimony in this case, and we’ve had no trouble identifying the opinions she
intends to offer.
Second, ZAGG contends that “much of Ms. Greer’s proposed testimony is inadmissible
hearsay.” Id. at 19. “Ms. Greer,” ZAGG says, “does not rely on admissible internal Amazon
documents, data, or communications, nor does she cite any firsthand knowledge of Amazon’s current
practices.” Ibid. In short, ZAGG believes that Greer’s opinions are merely “out-of-court assertions
about Amazon’s policies and practices, offered for their truth.” Ibid.
DVG counters that Greer’s testimony is grounded in her firsthand knowledge of Amazon’s
policies, gleaned from her “substantial experience in the Amazon space, in particular its policies as she
has inter alia consulted for hundreds of Amazon sellers.” Response at 23. While DVG concedes that
“a portion of Ms. Greer’s Report does cite to various Amazon webpages,” it says that these citations
are only meant to illustrate “what Amazon publicly asserts to be its policies”—and are not being
offered for the truth of “how Amazon applies its policies.” Ibid. That information, DVG argues, is
introduced through Greer’s expert opinions “based on her own extensive experience working with
Amazon internally and externally for over 15 years.” Ibid. Again, we agree with DVG.
On this issue, we find the Eleventh Circuit’s decision in Jennings instructive. The two
defendants there appealed the district court’s decision to admit the testimony of the government’s
workers’-compensation expert. See Jennings, 599 F.3d at 1248. That expert testified based on her
“experience and conversations over her career with workers’ compensation professionals,” which the
appellants argued constituted inadmissible hearsay. Id. at 1249. As the Eleventh Circuit explained,
however, that testimony wasn’t hearsay:
Szymoniak testified regarding general practice in a field—third party administrators’
knowledge of appropriate and legitimate business practices. This was testimony by the
witness about her work and her familiarity with the regulatory environment. It was
evidence in support of her competence to express an opinion regarding the awareness
of certain industry requirements—that knowledge of these requirements was essential
to persons in this field. It was not an effort to prove what the regulations were from
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the statements of others. Knowledge of an industry’s business practices—unlike technical
accounting valuations—is gleaned from years of working within the industry and with its professionals.
It is not a recounting of out of court statements of others.
Ibid. (emphasis added). So too here: Greer’s testimony isn’t a mere recounting of the out-of-court
statements of others—it’s expert analysis about the industry’s business practices gleaned from her
years of experience as an Amazon employee and consultant.
***
We therefore DENY ZAGG’s Motion to Exclude the Report of DVG’s Expert [ECF
No. 306].5
DONE AND ORDERED in the Southern District of Florida on December 15, 2025.
________________________________
ROY K. ALTMAN
UNITED STATES DISTRICT JUDGE
cc: 	counsel of record
5 Obviously, this decision is without prejudice—meaning that we’ll allow ZAGG to re-raise
its challenge to Greer’s testimony if, at trial, it becomes clear that Greer isn’t in fact familiar
with the relevant Amazon policies.
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