The opinion
United States Tax Court
T.C. Memo. 2024-45
ROBERT Y. DIAZ AND BRITTANY L. DIAZ,
Petitioners
v.
COMMISSIONER OF INTERNAL REVENUE,
Respondent
__________
Docket No. 4855-20. Filed April 16, 2024.
__________
Robert Y. Diaz and Brittany L. Diaz, pro sese.
Anne M. Craig and Melinda K. Fisher, for respondent.
MEMORANDUM FINDINGS OF FACT AND OPINION
LAUBER, Judge: This case, like several others pending in this
Court, involves the Federal income tax liability of a U.S. taxpayer em-
ployed by a U.S. defense contractor at a joint military base in Australia.
Petitioner husband was so employed during 2015–2017. Like similarly
situated employees, he was asked to sign (and he and his wife allegedly
did sign) a Closing Agreement with the Internal Revenue Service (IRS
or respondent) waiving the right to claim, with respect to wages earned
at the base, the “foreign earned income exclusion” (FEIE) provided by
section 911. 1 In exchange Australia agreed that no Australian income
tax would be withheld from his wages.
After enjoying freedom from Australian tax, petitioners seek shel-
ter from U.S. tax as well. They contend that the Closing Agreement was
1 Unless otherwise indicated, statutory references are to the Internal Revenue
Code, Title 26 U.S.C. (Code), in effect at all relevant times, and Rule references are to
the Tax Court Rules of Practice and Procedure.
Served 04/16/24
2
[*2] invalid on various grounds, that their waiver was inoperative, and
that they are entitled to claim the FEIE after all. Several Tax Court
cases presenting this issue have been resolved on summary judgment,
and one case is currently on appeal. See Smith v. Commissioner, 159
T.C. 33 (2022), appeal docketed, No. 23-1050 (D.C. Cir. Feb. 23, 2023).
But this case presents a distinct factual question—whether petitioners
actually signed the Closing Agreement. We bifurcated the case and held
a partial trial directed solely to that question. Rejecting petitioners’ as-
sertions that their signatures were forged, we resolve this question in
respondent’s favor.
FINDINGS OF FACT
The following facts are derived from the pleadings, two Stipula-
tions of Facts, and documents and testimony admitted into evidence at
trial. The notice of deficiency was addressed to petitioners at an address
in Colorado, and the parties have stipulated that petitioners resided in
Colorado when they timely petitioned this Court. Absent stipulation to
the contrary, appeal of this case would apparently lie to the U.S. Court
of Appeals for the Tenth Circuit. See § 7482(b)(1)(A), (2).
Petitioner husband (Mr. Diaz or petitioner) joined the military at
age 18 and served in the U.S. Air Force at various locations in Asia. His
final posting was to the Joint Defense Facility Pine Gap (JDFPG or Pine
Gap), a joint U.S./Australia military base near Alice Springs in central
Australia. While serving at Pine Gap he became acquainted with Ray-
theon Co., a U.S. defense contractor that employed many people at the
base.
After 12 years of military service, Mr. Diaz decided not to reenlist.
Instead he applied to work for Raytheon at Pine Gap in a civilian capac-
ity. He returned to the United States in 2014, updated his security
clearances, took various tests, and was offered a job by Raytheon in early
2015.
In late July 2015 Mr. Diaz went to Garland, Texas, to complete a
three-day on-boarding process for this position. He there executed var-
ious documents, including a “Memorandum of Understanding and
Agreement” (MOU). By executing the MOU he acknowledged that he
had been provided a copy of (and had familiarized himself with) the “In-
ternational JDFPG Handbook” (Handbook).
The Handbook outlined the conditions of employment with Ray-
theon at Pine Gap, including the company’s requirements relating to
3
[*3] execution of an IRS closing agreement. “The purpose of the Closing
Agreement,” the Handbook explained, “is an acknowledgment by the
employee that the employee . . . will continue to pay U.S. federal income
tax for the period of his [employment] and will not claim any [FEIE]
exclusion . . . with respect to income derived from services for Raytheon
at JDFPG.” “If the employee elects not to sign a Closing Agreement,”
the Handbook advised, “the Raytheon Payroll Center will be directed to
withhold income tax at the Australian rate and forward those withhold-
ings to the Australian Taxation Office.”
On July 27, 2015, as part of the on-boarding process, Linda Ross,
an administrative officer with Raytheon, explained the closing agree-
ment procedure to Mr. Diaz. Petitioners admitted in their Petition that,
“[d]uring th[is] conversation, Petitioner was told that signing the Clos-
ing Agreement was a condition of employment for the position that Pe-
titioner took at JDFPG.” With that understanding, Mr. Diaz accepted
Raytheon’s offer of employment. Raytheon made travel arrangements
to Australia for petitioner and his family.
Petitioner’s employment at Pine Gap commenced on August 7,
2015. When he arrived at the base, Daniel Christensen, who testified
credibly at trial, was the Program Administrator for Raytheon at Pine
Gap. Mr. Christensen had worked for Raytheon since 2012. He was
responsible for employee benefit programs (including housing and trans-
portation), passport renewals, and various documentation require-
ments, including the execution of IRS closing agreements.
Mr. Diaz met with Mr. Christensen at the base on August 13,
2015, to execute several of these documents. The first was an “Employee
Purchase Agreement,” relating to a $10,000 interest-free loan extended
by Raytheon to facilitate petitioners’ purchase of a vehicle. Mr. Diaz
signed the document, dating his signature August 13, 2015. Mr. Chris-
tensen’s signature appears immediately below with the same date. Mr.
Christensen signed as the officer providing “Raytheon Final Approval.”
The second document, related to the first, was a “Payroll Deduc-
tion Authorization.” This document authorized Raytheon to deduct from
Mr. Diaz’s wages the required payments on the vehicle loan. Mr. Diaz
signed the document, dating his signature August 13, 2015. Mr. Chris-
tensen’s signature appears immediately below, with the same date.
Mr. Christensen signed as the “Witness” to Mr. Diaz’s signature.
4
[*4] The third document was the IRS Closing Agreement, four copies
of which were required to be signed by petitioners as joint filers. Mrs.
Diaz apparently signed the copies first, and Mr. Diaz brought them with
him to his meeting with Mr. Christensen. The record is unclear as to
whether Mr. Diaz signed the agreement before or during his meeting
with Mr. Christensen. In any event, he dated his signature August 13,
2015.
The fourth document was captioned “Declaration.” This was a
Raytheon document intended to accompany the executed Closing Agree-
ment. All U.S. citizens employed by Raytheon at Pine Gap were re-
quired to sign this Declaration. By signing it Mr. Diaz acknowledged
that “entering into a closing agreement [wa]s a voluntary action on [his]
part” and that, if he had declined to execute the Closing Agreement,
Raytheon would “deduct Australian tax installments from [his] salary.”
At the bottom of the Declaration appeared a “Note to Employee.”
It stated as follows: “This form and an executed U.S. closing agreement
should be lodged with your employer in duplicate.” Immediately below
that was a “Note to Employer.” It stated as follows: “When this form
together with an executed Closing Agreement is submitted to you, they
may be considered as authority for not making Australian tax install-
ment deductions.”
Mr. Diaz signed the Declaration, dating his signature August 13,
2015. Mr. Christensen affixed his signature immediately below
Mr. Diaz’s signature. He thereby confirmed that Mr. Diaz’s signature
had been “witnessed by” him on behalf of Raytheon. Mr. Christensen
credibly testified that he could not recall any Raytheon employee at Pine
Gap who had ever refused to sign an IRS closing agreement.
The record includes two copies of the Declaration that Mr. Diaz
signed on August 13, 2015. Raytheon’s file copy appears in the record
as part of Exhibit 19-R. Mr. Diaz’s copy appears in the record as Exhibit
16-J. The parties have stipulated that Exhibit 16-J “is a declaration for
Petitioner Robert Y. Diaz that petitioner Robert Y. Diaz received while
working at JDFPG.”
Mr. Christensen was in charge of securing executed closing agree-
ments from all U.S. citizens working for Raytheon at Pine Gap. The
procedure was as follows: Each employee (and spouse where necessary)
would execute four original copies of the closing agreement, and
Mr. Christensen would forward them to the IRS for execution. After the
5
[*5] agreements were signed by an appropriate Treasury official, the
IRS would keep one copy of the agreement in its files and send three
copies back to Mr. Christensen. Mr. Christensen would keep one copy
for Raytheon’s files, give one copy to the employee, and send one copy to
the Australian Taxation Office.
On February 12, 2016, Mr. Christensen mailed a letter to the IRS
forwarding copies of closing agreements executed by 19 Raytheon em-
ployees, including Mr. Diaz. Mr. Christensen asked the IRS to “sign all
four copies [of each agreement] and return three copies back” to Ray-
theon in Australia. The letter stated that “the [D]eclarations have also
been completed and will be held here for forwarding to the Australian
Taxation Office once the Closing Agreements are returned from the
IRS.”
Mr. Christensen left Raytheon in late February 2016 and George
Brown assumed many of his responsibilities. On June 21, 2016, the IRS
returned to Raytheon three executed copies of petitioners’ Closing
Agreement. Mr. Brown received these documents and distributed them
as discussed above—one copy to Raytheon’s files, one copy to Mr. Diaz,
and one copy to the Australian Taxation Office. Raytheon did not with-
hold any Australian income tax from Mr. Diaz’s wages during 2015–
2017, and he did not otherwise pay any Australian tax during his em-
ployment with Raytheon.
The record includes three copies of the Closing Agreement exe-
cuted by petitioners, excluding only the copy sent to the Australian Tax-
ation Office. The IRS file copy, bearing the signatures of both petition-
ers dated August 13, 2015, appears in the record as Exhibit 14-R. Ray-
theon’s file copy, bearing the signatures of both petitioners dated August
13, 2015, appears in the record as part of Exhibit 19-R. Petitioners’ copy
of the Closing Agreement, bearing their signatures dated August 13,
2015, appears in the record as Exhibit 17-J. The parties have stipulated
that Exhibit 17-J “is a copy of the Closing Agreement for petitioner Rob-
ert Y. Diaz that petitioner Robert Y. Diaz received while working at
JDFPG.”
During 2015 Mr. Diaz was paid $43,462 for the services he per-
formed for Raytheon at Pine Gap. For the 2015 taxable year petitioners
timely filed Form 1040, U.S. Individual Income Tax Return, reporting
that income. Consistently with their obligations under the Closing
Agreement, they did not claim the FEIE with respect to any portion of
the wages Mr. Diaz earned at Pine Gap.
6
[*6] During 2016 Mr. Diaz was paid $113,576 for the services he per-
formed for Raytheon at Pine Gap. For the 2016 taxable year petitioners
timely filed Form 1040 reporting that income. Consistently with their
obligations under the Closing Agreement, they did not claim the FEIE
with respect to any portion of the wages Mr. Diaz earned at Pine Gap.
On March 1, 2018, petitioners filed with the IRS Form 1040X,
Amended U.S. Individual Income Tax Return, for 2016. On that return
they claimed the FEIE with respect to the bulk of the wages Mr. Diaz
earned at Pine Gap. They accordingly requested a refund of $9,434. Re-
spondent admitted in his Answer that “the IRS issued [a] refund[] based
on the information petitioners reported on the Form 1040X for 2016.”
During 2017 Mr. Diaz was paid $75,563 for the services he per-
formed for Raytheon at Pine Gap (his employment there having termi-
nated on August 6, 2017). For the 2017 taxable year petitioners timely
filed Form 1040 reporting that income. On that return they claimed the
FEIE with respect to the bulk of the wages Mr. Diaz earned at Pine Gap.
The IRS selected petitioners’ 2016 and 2017 returns for examina-
tion. It determined (among other things) that they were ineligible for
the FEIE because they had waived the right to claim that exclusion by
executing the Closing Agreement. On May 12, 2020, the IRS mailed
petitioners a timely notice of deficiency determining deficiencies of
$9,434 and $10,836 for 2016 and 2017, respectively, plus accuracy-
related penalties under section 6662(a).
Petitioners timely petitioned this Court. They alleged in their Pe-
tition that “the signatures on [the] Closing Agreement that the IRS has
in [its] possession do not contain signatures of Petitioners.” They fur-
ther alleged that Mr. Diaz “did not sign nor was he provided a copy of
the Closing Agreement for [his wife] to sign.”
On May 24, 2023, petitioners’ counsel moved to withdraw, indi-
cating that she had represented them “pursuant to a third-party payor
agreement that is no longer in existence.” We granted that Motion and
petitioners thereafter proceeded pro sese. On September 13, 2023, re-
spondent filed a Motion to Bifurcate, requesting that we “bifurcate the
trial proceedings . . . and proceed first with the issue of whether peti-
tioners signed the Closing Agreement.”
In his Motion to Bifurcate respondent indicated that he had “sent
an original of the [C]losing [A]greement to the IRS Criminal Investiga-
tion’s Center for Science and Design for handwriting analysis.” That
7
[*7] office was asked to compare Mr. Diaz’s signatures, as they appeared
on the Closing Agreement and the Declaration, with his signatures as
they appeared on 11 other documents produced from the personnel file
that Raytheon had maintained for Mr. Diaz. The resulting report found
“indications” that Mr. Diaz “may have written the questioned signature”
on the Closing Agreement, but it found these indications “far from con-
clusive.” The report reached “no conclusion” as to whether Mr. Diaz had
written the questioned signature on the Declaration. 2
In the light of this report, respondent represented that there “re-
main[ed] a genuine dispute of material fact as to whether or not peti-
tioners signed the [C]losing [A]greement.” We granted the Motion to
Bifurcate and set this case for a partial trial limited to the question of
the authenticity of their signatures. We held the partial trial via
Zoomgov on December 14, 2023, with petitioners appearing from Aus-
tralia.
OPINION
I. Burden of Proof
Section 7121(a) authorizes the Secretary to “enter into an agree-
ment in writing with any person relating to the liability of such person
. . . in respect of any internal revenue tax for any taxable period.” The
Code refers to these agreements as “closing agreements.” Under section
7121(b), once a closing agreement is approved by the Secretary or her
delegate, the agreement is “final and conclusive . . . except upon a show-
ing of fraud or malfeasance, or misrepresentation of a material fact.”
Petitioners contend that the Closing Agreement is invalid be-
cause the signatures appearing above their names are not their signa-
tures but were forged. As with factual matters generally, petitioners
bear the burden of proving the facts they allege. See Rule 142(a); Welch
v. Helvering, 290 U.S. 111, 115 (1933). In certain circumstances section
7491 may shift to the Commissioner the burden of proof with respect to
a factual issue relevant in ascertaining the taxpayer’s liability. But that
section applies only if the taxpayer (among other things) “introduces
credible evidence with respect to [that] factual issue.” § 7491(a)(1). Pe-
titioners have adduced no credible evidence substantiating their
2 The report explained that “[a]ll of the questioned and known signatures [of
Mr. Diaz] contain stylization, where features of individual characters are not discern-
ible. This style of writing limits the features available for comparison.”
8
[*8] allegations that their signatures on the Closing Agreement and/or
Declaration were forged. The burden of proof thus remains on them.
II. Signature Authenticity Issue
We find as a fact that the signatures of Mr. Diaz and his wife that
appear on the Closing Agreement are in fact their signatures. We have
set forth above our findings of fact concerning the timeline of events be-
fore and after August 13, 2015, the date on which Mr. Diaz signed the
agreement and the accompanying Declaration. Mr. Diaz testified as to
a very different version of the timeline at trial, and he relied heavily on
what might be called the “forensic evidence” presented by different ver-
sions of his signatures on various Raytheon documents. We discuss his
contentions in turn below.
A. Timeline of Events
At trial Mr. Diaz admitted having been told during the on-
boarding process that he would need to sign an IRS closing agreement.
But he assertedly refused, stating: “Looks like I’ll be looking for another
job.” The reason he allegedly refused to sign a closing agreement was
that he did not want to waive the FEIE, which he supposedly regarded
as a valuable tax benefit. He accepted the Raytheon job and went to
Australia, allegedly believing that he could extricate himself from the
closing agreement requirement. After arriving at Pine Gap he said he
was confronted on multiple occasions by Mr. Christensen, who told him
that he needed to sign a closing agreement. Each time he allegedly re-
fused, stating: “Looks like I’ll be looking for another job.” He testified
that in late 2016 he was confronted by Mr. Brown—Mr. Christensen’s
replacement—who again insisted that he sign a closing agreement. Al-
legedly he again refused.
We did not find Mr. Diaz to be a credible witness, and we found
his version of the story to be wholly implausible. That is so for numerous
reasons:
● Mr. Diaz admitted in the Petition that Ms. Ross told him, dur-
ing the July 2015 on-boarding process, that “signing the Closing Agree-
ment was a condition of employment for the position that [he] took at
JDFPG.” Mr. Diaz cannot plausibly have believed that he could some-
how get out of this condition of employment. He had previously served
for 12 years at overseas U.S. military bases, where rules tend to be
strictly enforced.
9
[*9] ● During 2014 and 2015 Mr. Diaz spent months preparing for the
Raytheon job and went to Texas for the final on-boarding process. After
incurring these costs, flying halfway around the world, securing housing
from Raytheon in Alice Springs for his family, purchasing a vehicle with
a loan from Raytheon, and working in Australia for many months, it is
implausible that he would have told Messrs. Christensen and Brown
that he would “be looking for another job” rather than execute a closing
agreement. We find it incredible that petitioner would incur these sunk
costs, quit a well-paying job, and uproot himself and his family from
Australia for no logical reason.
● Mr. Diaz’s alleged reason for refusing to sign a closing agree-
ment—that he did not want to forfeit the benefit of claiming the FEIE—
makes no economic sense. He was repeatedly informed that, in ex-
change for waiving the FEIE, his wages would be exempt from Austral-
ian income tax. In the Declaration he acknowledged that Raytheon
would withhold Australian tax if he had declined to sign a closing agree-
ment. But as Raytheon explained in the Handbook he reviewed, “Aus-
tralian tax rates are higher than current U.S. tax rates.” Petitioners
have offered no rational explanation as to why they would have pre-
ferred, against their economic interest, to pay Australian tax instead of
U.S. tax.
● Mr. Christensen affixed his signature on the Declaration im-
mediately below Mr. Diaz’s signature. He thereby confirmed that Mr.
Diaz’s signature on the Declaration had been “witnessed by” him on be-
half of Raytheon. By signing the Declaration, Mr. Diaz acknowledged
that “entering into a closing agreement is a voluntary action on my
part.” The Closing Agreement and the Declaration were signed the
same day, August 13, 2015. It is wholly implausible that Mr. Diaz would
have signed the Declaration—as Mr. Christensen confirmed that he
did—while refusing to sign the Closing Agreement to which the Decla-
ration refers.
● Mr. Diaz’s assertion that Mr. Brown confronted him in late
2016 about the need to sign a closing agreement is not credible.
Mr. Christensen had forwarded four original copies of the Closing Agree-
ment, signed by both petitioners, to the IRS in February 2016. In June
2016 the IRS returned three fully executed copies of the Closing Agree-
ment to Raytheon. Mr. Brown would thus have had no occasion, in late
2016, to confront Mr. Diaz about his failure to sign the Closing Agree-
ment.
10
[*10] ● Raytheon distributed original copies of the Closing Agreement
to Mr. Diaz and the Australian Taxation Office, retaining one copy in its
files. The parties have stipulated that Exhibit 17-J “is a copy of the
Closing Agreement for petitioner Robert Y. Diaz that petitioner Robert
Y. Diaz received while working at JDFPG.” Mr. Diaz’s admission that
he received a fully executed copy of the Closing Agreement while work-
ing at Pine Gap sits uneasily with his assertion that he repeatedly re-
fused to sign the Closing Agreement while working at Pine Gap.
● The parties have stipulated that Exhibit 16-J “is a Declaration
for Robert Y. Diaz that petitioner Robert Y. Diaz received while working
at JDFPG.” This is the Declaration that Mr. Diaz signed on August 13,
2015, during his meeting with Mr. Christensen. Mr. Diaz’s admission
that he received an executed copy of the Declaration while working at
Pine Gap sits uneasily with his assertion that his signature on the Dec-
laration was forged.
● Petitioners have offered no plausible explanation as to who
“forged” their signatures on the Closing Agreement, or why anyone at
Raytheon would have done this. Mr. Christensen, who witnessed
Mr. Diaz’s signature on the Declaration, was the Raytheon employee re-
sponsible through February 2016 for the entire closing agreement pro-
cess. He testified—firmly and credibly—that he would never have
forged a signature on any document, much less a document that he was
tasked with submitting to the IRS. If petitioners had really declined to
sign the Agreement, Raytheon’s obvious response—as stated in the Dec-
laration and Handbook—would have been to withhold Australian tax
from Mr. Diaz’s wages. The notion that a Raytheon employee would
instead forge petitioners’ signatures on a closing agreement is wholly
implausible; that person would have everything to lose, and nothing to
gain, by doing this. Petitioners offer nothing but conspiracy theories in
support of a contrary conclusion.
● Finally, the proof of the pudding is in the eating. Mr. Diaz
received wages from his employment at Pine Gap during 2015, but peti-
tioners did not claim the FEIE on their 2015 tax return. Mr. Diaz re-
ceived wages from his employment at Pine Gap during 2016, but peti-
tioners did not claim the FEIE on the return they originally filed for
2016. Mr. Diaz asserted that he regarded the FEIE as such a valuable
tax benefit that he would rather quit his job than forfeit that benefit. If
that were true, petitioners’ failure to claim the FEIE on two consecutive
tax returns is inexplicable.
11
[*11] B. “Forensic Evidence”
In response to a trial subpoena Raytheon produced more than a
dozen documents from Mr. Diaz’s personnel file. These documents in-
cluded copies of the signature page of his U.S. passport (and that of his
wife); forms verifying the identities of his wife and dependent children;
requests for cash travel benefits; authorizations for payroll deductions;
agreements regarding his conditions of employment; employee time card
forms; an acknowledgment of changes in benefits; a residential tenancy
agreement; and his notice of resignation from Raytheon effective August
6, 2017.
The documents produced from Mr. Diaz’s personnel file include
Raytheon’s copy of the executed Closing Agreement and a copy of the
related Declaration signed by Mr. Diaz and witnessed by Mr. Christen-
sen on August 13, 2015. Petitioners insist that their signatures on those
two documents were forged. They admit that their signatures on all
other documents produced from Mr. Diaz’s personnel file are genuine.
Neither party called a handwriting expert as a witness, and this
Court professes no expertise on the subject. But superficial observation
reveals a number of commonalities among Mr. Diaz’s writings on the
Closing Agreement, the Declaration, and the other personnel documents
that bear his signature:
● On many of the documents Mr. Diaz printed his name at the
top and placed his signature below. The printed version of his name is
quite idiosyncratic. “Robert” is printed in the usual way, with a capital
“R” and all other letters lower case. “Young,” his middle name, is printed
with a capital “Y,” three lower-case letters, and a capital “G.” And Diaz
is printed with a capital “D,” a lower-case “i,” and a capital “A” and “Z.”
Every personnel document shows his printed name in this manner. And
so do the Closing Agreement and the Declaration, in exactly the same
way. We find this very persuasive evidence that Mr. Diaz completed all
of these documents.
● The personnel file includes four documents ostensibly signed
by Mr. Diaz on August 13, 2015—the Closing Agreement, the Declara-
tion, the Employee Purchase Agreement, and the Payroll Deduction Au-
thorization. In each case, Mr. Diaz dated the document as “13 AuG
2015” or “13 AuGust 2015.” He thus wrote “AuGust” using a capital “G,”
just as he did when writing “YounG.” We find this persuasive evidence
that Mr. Diaz completed all four documents.
12
[*12] ● Mr. Diaz’s signatures on the documents contained in his per-
sonnel file do vary somewhat. His first name is generally written as
something like “Rob,” Rbt,” or “R.” His middle name generally appears
as “Y,” sometimes followed by a squiggle. And his last name is generally
written as “Di,” sometimes followed by a squiggle. Despite these varia-
tions, his signatures on the Declaration and the Closing Agreement re-
semble his signatures on the other personnel documents in terms of how
the letters are formed, the angle at which the letters are written, and
the spacing between the names. And his wife’s signature on the Closing
Agreement closely resembles her signature on her passport and on an-
other document from the personnel file that bears her signature.
● Petitioners’ chief argument is that Mr. Diaz’s signature on the
Closing Agreement, unlike his other signatures, spells out at least part
of his middle name. To the extent the signatures differ, it is a difference
of degree rather than of kind. As noted above, Mr. Diaz often wrote his
middle name as “Y” with a squiggle. On the Closing Agreement, the
squiggle is perhaps a millimeter longer than on other iterations of his
signature.
On balance, we find that the “forensic evidence” regarding peti-
tioners’ signatures points to the same conclusion as the timeline of
events discussed earlier. Petitioners have failed to carry their burden
of proving that their signatures on the Closing Agreement were forged.
We thus find as a fact that the signatures of Mr. Diaz and his wife that
appear on the Closing Agreement are their genuine signatures. 3
3 A 19-page post-trial brief was submitted on petitioners’ behalf. It is devoted
largely to technical questions about tax treaties, Australian law, and other matters
irrelevant to the signature authenticity issue. Petitioners admitted at trial that they
were “working with” a lawyer named John Castro. Mr. Castro did not enter an ap-
pearance in this case; he is not admitted to practice in this Court (or apparently in any
other court); and he was recently indicted for tax crimes. See Press Release, U.S. Dep’t
of Justice, Mansfield Man Charged in Fraudulent Tax Return Scam (Jan. 10, 2024),
https://www.justice.gov/usao-ndtx/pr/mansfield-man-charged-fraudulent-tax-return-
scam. The Court believes that petitioners’ post-trial brief was likely ghost-written by
Mr. Castro or someone associated with him. That brief devotes less than a page to
discussion of the signature authenticity issue. On that page it asserts that “the Closing
Agreement contained a witness signature section” and finds it suspicious that Mr.
Christensen did not sign the Closing Agreement as a witness to petitioners’ signatures.
But the Closing Agreement does not have “a witness signature section”; the Closing
Agreement has signature lines only for the taxpayers, their representative (if any), and
the Commissioner of Internal Revenue. Witness signature sections were contained in
the other three documents Mr. Diaz signed on August 13, 2015—the Declaration, the
13
[*13] To reflect the foregoing,
Decision will be entered upon the conclusion of further proceedings
in this case.
Employee Purchase Agreement, and the Payroll Deduction Authorization. Mr. Chris-
tensen duly signed each of those documents as a witness and/or approving officer for
Raytheon.