COURT OF CHANCERY

OF THE

STATE OF DELAWARE

MORGAN T. ZURN

VICE CHANCELLOR

LEONARD L. WILLIAMS JUSTICE CENTER

500 N. KING STREET, SUITE 11400

WILMINGTON, DELAWARE 19801-3734

May 22, 2024

Elizabeth S. Fenton, Esquire 

Ballard Spahr LLP

919 N. Market Street, 11th Floor

Wilmington, DE 19801

Sean Meluney, Esquire

Meluney Alleman & Spence LLC

1143 Savannah Road, Suite 3-A

Lewes, DE 19958

RE: Brex Inc. v. Dizhe Su,

 C.A. No. 2022-0758-MTZ

Dear Counsel:

I write to address plaintiff Brex Inc.’s motion to disqualify counsel for 

defendant and counterclaim plaintiff Dizhe Su. The motion is based on facts that 

are down in the weeds; I write for the parties who are already among them.

Brex seeks to disqualify Su’s trial counsel under Rule 3.7(a) of the Delaware 

Lawyers’ Rules of Professional Conduct (the “DLRPC”). That rule states that “[a] 

lawyer shall not act as advocate at a trial in which the lawyer is likely to be a 

necessary witness unless . . . disqualification of the lawyer would work substantial 

hardship on the client.”1

 Because Su’s lawyer is not likely to be a necessary 

witness, Rule 3.7(a) does not require disqualification. 

1 Del. Lawyers’ R. Pro’l Conduct 3.7(a). The rule provides two other exceptions not 

applicable here.
Brex Inc. v. Su,

C.A. No. 2022-0758-MTZ

May 22, 2024

Page 2 of 9

Brex also seeks disqualification under DLRPC 1.9. Brex has waited too 

long and waived any conflict under that rule.

I. Background

This action arises out of Brex’s acquisition of Pry Financials, Inc. (“Pry”), 

which Su founded. The parties dispute (1) whether Su disclosed to Brex that Pry 

was involved in litigation before the acquisition closed, and (2) whether Brex 

terminated Su for cause after the acquisition closed. The parties refer to the

litigation at issue as the “Beowawie Litigation,” and I do the same. Gregory 

Patterson, Esquire, represented Pry and Su in the Beowawie Litigation. 

Patterson and Su each communicated with Brex about Su’s knowledge of the 

Beowawie Litigation. Part of this dispute is animated by purported differences in 

what they said. Su maintains that he had forgotten about the Beowawie Litigation

during due diligence, and that he had had no contact with Patterson between 

October 2021 and March 2022.2

 Brex’s counsel, Ryan Marsh, testified that on a 

May 9, 2022 call, Patterson “indicated” Patterson had spoken to Su in the two to 

three months prior.

3

 Marsh passed along his impressions of his call with Patterson 

2 Docket item (“D.I.”) 180 at Mot. [hereinafter “Mot.”], Ex. 2 at 103, 152.

3

Id. at Ex. 11 at 137.
Brex Inc. v. Su,

C.A. No. 2022-0758-MTZ

May 22, 2024

Page 3 of 9

to Brex’s board.

4 Brex contends the board considered the contradictions between 

the accounts, and terminated Su for cause.

5

 

Patterson has represented Su in this litigation since it was filed in August 

2022. He was admitted pro hac vice on September of 2022.

6

 On July 21, 2023, 

Brex raised its belief that Patterson was “a material witness in this case.”7

 

Patterson was undeterred, and continued to serve as Su’s lead counsel.8

 Brex 

sought to depose Patterson, and Su resisted; addressing Brex’s motion to compel,

the special discovery master in this case concluded Patterson’s knowledge about 

his communications with Su warranted a limited deposition.9 No party took 

exception. At his deposition, Patterson testified that he does not remember the 

May 2022 call with Marsh, and that if he did say he spoke to Su three to four 

months before the call, he “was wrong.”10 

4 Id.

5 Mot. ¶ 18.

6 D.I. 26.

7 Mot., Ex. 15 at 2.

8 See id. at 1.

9 D.I. 147 at 11–14. The Court thanks Sarah Delia for her work as discovery master.

10 Mot., Ex. 4 at 78.
Brex Inc. v. Su,

C.A. No. 2022-0758-MTZ

May 22, 2024

Page 4 of 9

When I granted Brex’s motion to compel, I asked Brex for its position on 

whether it intended to seek Patterson’s disqualification.11 Brex’s motion to 

disqualify followed, and was fully briefed and presented at argument on May 20, 

2024.12

II. Analysis

Disqualification is a harsh result; the basis must be proven by clear and 

convincing evidence.13 “[M]otions grounded on [Rule 3.7] are rare and even more 

rarely granted.”14 Rule 3.7(a) forbids a lawyer who is likely to serve as a necessary 

trial witness from serving as a trial advocate, absent substantial hardship on the 

client.

15 This is in part because that situation “can prejudice the tribunal and the 

opposing party and can also involve a conflict of interest between the lawyer and 

11 D.I. 170 (“Brex shall supply the Court and Mr. Su with its position on whether it 

intends to seek disqualification of Mr. Patterson as Mr. Su’s counsel given his role as a 

fact witness.”).

12 Mot.; D.I. 190 at Opp.; D.I. 198 at Reply; D.I. 207. The transcript of the hearing on 

Brex’s motion has not been finalized. Citations in the form “Rough Tr. –” refer to a 

rough copy of the transcript. 

13 McLeod v. McLeod, 2014 WL 7474337, at *2 (Del. Super. Dec. 20, 2014).

14 In re Oxbow Carbon LLC Unitholder Litig., 2017 WL 3207155, at *6 (Del. Ch. 

July 28, 2017) (alterations in original).

15 Del. Lawyers’ R. Pro’l Conduct 3.7(a).
Brex Inc. v. Su,

C.A. No. 2022-0758-MTZ

May 22, 2024

Page 5 of 9

client.”16 The situation is so fraught that the Court may, and indeed must, raise the 

issue on its own, and nonparties have standing to raise it as well.17 The parties 

here dispute whether Patterson is likely to be a “necessary” witness under the rule. 

The rule’s standard requiring disqualification if the lawyer is “likely to be a 

necessary witness” was introduced to raise the standard from “ought to be called as 

a witness,” in an effort to reduce the rule’s use in gamesmanship.18 Courts have 

discussed the “necessary” standard in terms of whether the lawyer or her testimony 

will be “central” or “essential” to the issues.19 Courts have concluded the rule is 

16 Id. at cmt. 1.

17 See In re Estate of Waters, 647 A.2d 1091, 1095–98 (Del. 1994) (concluding the Court 

of Chancery’s failure to disqualify counsel who was also a necessary witness was plain 

error, and noting the Court’s obligation to raise the issue ex mero motu); Oxbow Carbon, 

2017 WL 3207155, at *6 (“A non-client litigant only has standing to enforce the rule 

‘when he or she can demonstrate that the opposing counsel’s conflict somehow 

prejudiced his or her rights.’” (quoting Appeal of Infotechnology, Inc., 582 A.2d 215, 221 

(Del. 1990)). 

18 See In re Estate of Waters, 647 A.2d at 1096.

19 Id. at 1098 (reasoning the testimony was necessary because it was “central[] . . . to the 

contested issues”); In re Straight Path Commc’ns Inc. S’holder Litig., 2022 WL 3654845, 

at *4 (Del. Ch. Aug. 25, 2022) (reasoning the testimony was necessary because would 

“presumably concern facts” that were “likely central to a primary issue in” the matter); 

Harker v. Grimes, 2022 WL 3665050, at *5 (Del. Ch. May 31, 2022) (concluding the 

movant had not demonstrated counsel’s testimony was “essential to the matter at hand 

and only available through her testimony”); McLeod v. McLeod, 2014 WL 7474337, at *3 

(Del. Super. Dec. 20, 2014) (explaining “necessary” means “necessary to the resolution 

of the suit” (internal quotation marks omitted) (quoting Hull-Johnson v. Wilm. Tr., 1996 

WL 769457, at *4 (Del. Super. Dec. 9, 1996))).
Brex Inc. v. Su,

C.A. No. 2022-0758-MTZ

May 22, 2024

Page 6 of 9

not triggered where testimony is cumulative or duplicative.20 Brex defined a 

necessary witness as “a witness that is needed to either prove or disprove your 

case-in-chief or your defense or your claims.”21 Indeed, this Court has 

distinguished between a case-in-chief witness and a rebuttal fact witness, with the 

former being “more ‘necessary’” under Rule 3.7(a).22

Su does not intend to call Patterson in his case-in-chief.23 Brex intends to 

call Patterson in its case-in-chief to bolster evidence that Patterson told Marsh that 

Patterson spoke with Su during the due diligence period, which Brex claims goes 

to whether Su was terminated for cause.

24 Certainly, the reasons why Brex’s board 

terminated Su are central to this case. But Patterson’s testimony is cumulative of 

and peripheral to Marsh’s: Marsh shared his own impression with the board. 

Patterson’s testimony is further peripheral to the issue of what the board did with 

20 See Del. Tr. Co. v. Brady, 1988 WL 94741, at *3 (Del. Ch. Sept. 14, 1988) (explaining 

Rule 3.7 requires that the attorney’s testimony be “not merely cumulative” (internal 

quotation marks omitted) (quoting Cannon Airways, Inc. v. Franklin Hldgs. Corp., 669 F. 

Supp. 96, 102 (D. Del. 1987))); Harker, 2022 WL 3665050, at *5 (denying a motion to 

disqualify where any testimony “would be merely cumulative or duplicative”).

21 Rough Tr. 48–49.

22 Straight Path, 2022 WL 3654845, at *3 n.30. The Straight Path court made this 

observation in the context of an attorney who was a potential case-in-chief witness for 

both parties. Id.

23 Rough Tr. 75. 

24 Id. at 86–87; Mot. ¶¶ 27, 29.
Brex Inc. v. Su,

C.A. No. 2022-0758-MTZ

May 22, 2024

Page 7 of 9

Marsh’s impression. And Patterson’s testimony that he does not remember the 

call, and if he said he spoke to Su during that period he was wrong, does nothing to 

bolster the conflict between Marsh’s and Su’s testimony.

Brex also intends to call Patterson to demonstrate that in this litigation, he 

contradicted his statement to Marsh.

25 Patterson has not done that: he testified he 

does not remember the call, and that if he said he spoke to Su in that time period he 

was wrong. And the argument that someone is a necessary witness because they 

can be impeached presupposes that his testimony is necessary. As explained, it is 

not.

Brex also intends to call Patterson to demonstrate the board investigation Su 

is attacking as inadequate was deficient because Patterson gave Marsh “wrong”

information.26 This is a peripheral rebuttal argument, not a central case-in-chief 

argument.

I cannot conclude that Patterson is likely to be a necessary witness under 

DLRCP 3.7(a) at trial. 

25 Rough Tr. 87 (“So we need to figure out -- we need to ask Mr. Patterson what was the 

reason for the contradiction.”).

26 Id. at 86–88; Mot. ¶ 30.
Brex Inc. v. Su,

C.A. No. 2022-0758-MTZ

May 22, 2024

Page 8 of 9

Brex also seeks disqualification under DLRPC 1.9. Brex contends that

Patterson represented Pry before the merger in the Beowawie Litigation, and so he 

represented Brex for four months “after Pry was legally subsumed post-merger into 

Brex.”27 From there, Brex complains that Patterson now represents Brex’s 

adversary in litigation concerning what Brex knew about the Beowawie Litigation. 

Brex filed this action in August 2022, and knew that month that Patterson 

represented Su.28 Brex was confident that it knew enough to threaten 

disqualification by July 2023.29 Brex did not seek disqualification until April 

2024, only a little over three months before trial is scheduled in this matter.

30 Such 

a delay from learning of the facts supporting disqualification, which creates more 

prejudice for the nonmovant than it could possibly alleviate for the movant, 

27 Mot. ¶ 36.

28 D.I. 1; e.g., D.I. 8 at 16 (opposition to Brex’s motion to expedite, with Patterson 

appearing on the signature block as counsel for Su).

29 Mot., Ex. 15 at 2–3.

30 D.I. 52 ¶ 1(r). At argument, Brex explained its motion under DLRPC 3.7 was only 

strong enough to bring once Patterson had been deposed. Rough Tr. 46. I do not see 

how Patterson’s deposition testimony makes any difference under DLRPC 1.9.
Brex Inc. v. Su,

C.A. No. 2022-0758-MTZ

May 22, 2024

Page 9 of 9

constitutes waiver.31 Brex has waived its claim for disqualification under DLRPC

1.9.

III. Conclusion

Brex’s motion for disqualification is DENIED. 

Sincerely,

/s/ Morgan T. Zurn

Vice Chancellor

MTZ/ms

cc: All Counsel of Record, via File & ServeXpress 

31 See In re The Hawk Mountain Tr. Dated Dec. 12, 2002, 2015 WL 5243328, at *6 (Del. 

Ch. Sept. 8, 2015) (“Delaware courts generally waive disqualification claims if the 

parties fail to assert them in a proper or timely manner.”); Kenton v. Bellevue Four, Inc., 

1999 WL 463684, at *1 (Del. Super. Apr. 26, 1999) (“A motion to disqualify should be 

made with reasonable promptness after a party discovers the facts which lead to the 

motion.” (internal quotation marks omitted) (quoting Cox v. Am. Cast Iron Pipe Co., 847 

F.2d 725, 729 (11th Cir. 1988))).