Wisconsin Lawyer
Vol. 78, No. 8, August 
2005
Resolving Commercial Disputes in a Global Economy
As Wisconsin's presence in the global economy grows, lawyers 
representing clients in international commerce, and lawyers involved in 
resolving international commercial disputes, must be prepared to operate 
under a body of law that differs from the more familiar Uniform 
Commercial Code.
 
 
by James Dries
n 1986, 
the United States Senate ratified the United Nations Convention on 
Contracts for the International Sale of Goods (the Convention), which 
became effective on Jan. 1, 1988 as the U.S. body of law to govern 
contracts within its scope.1 Despite the 
Convention's broad scope and 17-year existence as U.S. law, an 
observation made by the Eleventh Circuit Court of Appeals seven years 
ago remains valid today _ few cases decided in the United States have 
applied the Convention.2 But the 
Convention's relative anonymity undoubtedly will diminish soon, given 
its global reach and the rapid increase in the number of subscribing 
countries. Currently, 65 countries are signatories to the Convention, 
which is the domestic law of each of those countries. Given current 
trends, it is estimated that eventually more than 100 countries will 
subscribe to the Convention.3 The 65 
countries that are parties to the Convention account for more than 
two-thirds of all world trade and for a significant majority of the 
world's population.
James J. 
Dries, Marquette 1974, is a partner in the Chicago office of 
Baker & McKenzie LLP, an international law firm with offices in 69 
cities and 38 countries. He is a member of the firm's North American 
Litigation Practice Group. His litigation practice includes an emphasis 
in international disputes.
 
As the global economy continues its rapid expansion, the Convention 
will govern an ever-increasing number of contracts and a rising number 
of commercial disputes will be resolved by applying its principles. 
Statistics published by the Wisconsin Department of Commerce confirm the 
state's involvement in the energized global economy. Wisconsin exports 
alone totaled nearly $13 billion in 2004, an increase of more than 30 
percent in just five years. Of the 10 leading importers of Wisconsin 
goods, eight are Convention signatories. Practitioners unfamiliar with 
the Convention will be surprised to learn that the Convention applies 
even in the absence of a choice of law provision designating it as the 
body of law to govern the parties' agreement. For these reasons, lawyers 
representing clients in international commerce, and lawyers involved in 
resolving international commercial disputes, must be intimately familiar 
with the Convention and how it departs from other established bodies of 
commercial law, particularly the more familiar Uniform Commercial Code 
(UCC).
This article is not intended as an exhaustive analysis of the 
Convention or its differences from other bodies of commercial law but 
instead focuses on two specific topics that represent significant 
departures from the UCC: 1) the Convention's treatment of oral 
contracts, parol evidence, and subjective intent; and 2) the effect of 
merger clauses under the Convention.
The Scope of the Convention
The Convention applies to contracts for the sale of goods between 
parties whose places of business are in different countries if the 
countries are signatories to the Convention (referred to as contracting 
states).4 If the Convention applies, its 
provisions operate by default; only a properly worded choice of law 
provision will enable a party to opt out of the Convention. While the 
Convention expressly recognizes the right of contracting parties to 
exclude application of its provisions,5 the 
Convention generally will control even those contracts that have a 
choice of law provision if the provision does not affirmatively exclude 
applying the Convention.6 Thus, a choice of 
law provision that adopts the law of a contracting state as the 
contract's governing law will be deemed to adopt the Convention, because 
the Convention is the law of the contracting state.
Statute of Frauds, Parol Evidence, and Subjective Intent Under 
the Convention
The Convention's treatment of oral agreements marks an important 
departure from the UCC. Unlike the UCC, which proscribes enforcing oral 
contracts for the sale of goods having a price of $500 or more,7 the Convention contains no statute of frauds and 
expressly embraces oral contracts: "A contract of sale need not be 
concluded in or evidenced by writing and is not subject to any other 
requirement as to form. It may be proved by any means, including 
witnesses."8
The Convention also differs from the UCC in its approach to the 
enforcement of written contracts. The UCC affirmatively adopts a form of 
the parol evidence rule, which precludes evidence of a prior 
understanding or a contemporaneous oral agreement if the parties intend 
the written instrument as a final expression of their agreement.9 The Convention does not include any variation of 
the parol evidence rule, nor does it expressly permit the introduction 
of parol evidence. Nevertheless, various Convention provisions combine 
to leave little doubt concerning the admissibility of parol evidence, as 
the Eleventh Circuit noted in MCC-Marble Ceramic Center Inc. v. 
Ceramica Nuova D'Agostino.10
In that case, the court had to decide whether it could accept 
evidence of a party's subjective intent not to be bound by the 
unambiguous terms of the parties' written agreement. The court concluded 
that, notwithstanding the Convention's failure to expressly address the 
role of parol evidence, various provisions of the Convention permitted, 
indeed required, that the court consider evidence of the parties' 
subjective intent, even if the evidence conflicted with the written 
agreement's terms. First, the court noted that, since representatives of 
both parties acknowledged that they did not intend to be bound by 
certain written provisions, the court was required to examine the 
parties' subjective intent under Article 8(1) of the Convention, which 
provides:
"For the purposes of this Convention statements made by and other 
conduct of a party are to be interpreted according to his intent where 
the other party knew or could not have been unaware what that intent 
was."
Next, the court commented that the Convention specifically permits 
the enforcement of oral contracts.11 
Finally, the court observed that Article 8(3) requires courts to give 
"due consideration ... to all relevant circumstances of the case, 
including the negotiations" in determining the parties' intent.12 Read in concert, these provisions prompted the 
court to conclude that it could consider parol evidence to determine the 
parties' subjective intent, even if the evidence contradicts the written 
terms of the parties' purported agreement.
The approach to parol evidence and subjective intent taken by the 
MCC court has been followed by several other courts, leaving 
little doubt that written agreements governed by the Convention will be 
subject to far greater scrutiny than the same agreements would be if 
governed by the UCC.13
If, as the MCC court concluded, a party's subjective intent is 
a relevant inquiry even in the face of contrary written terms, then is 
it not plausible that a party could defeat a dispositive motion simply 
by submitting an affidavit, in which the party asserted that it was not 
the party's intention to be bound by the contract terms at issue? 
Concerned over such an interpretation of its opinion, the MCC 
court addressed this issue, noting that its decision was based in large 
measure on the unique circumstance in this case that both parties 
acknowledged "a subjective intent not to be bound by the terms of a 
prenprinted writing."14 Because, in the 
vernacular of Article 8, the defendant "knew or could not have been 
unaware" what the plaintiff's intent was, the court was compelled to 
examine the plaintiff's subjective intent. When a party does not know or 
could not have been aware of the other party's intent, the court must 
abandon the subjective intent inquiry of Article 8(1) in favor of the 
objective "reasonable person" standard of Article 8(2), which 
provides:
"If the preceding paragraph is not applicable, statements made by and 
other conduct of a party are to be interpreted according to the 
understanding that a reasonable person of the same kind as the other 
party would have had in the same circumstances."
Most courts that have addressed the role of parol evidence in the 
context of a written contract governed by the Convention have agreed 
with the MCC court's conclusion that parol evidence is 
appropriately considered in determining the parties' intent.15 One court, however, reached a contrary result. 
Responding to a parol evidence rule issue raised in the broader context 
of a choice of law question in Beijing Metals & Minerals 
Imports/Exports Corp. v. American Business Center Inc., the Fifth 
Circuit decided that it was unnecessary to resolve the choice of law 
issue "because our discussion is limited to application of the Parol 
Evidence Rule ... which applies regardless" of whether the 
Convention or another body of law applies.16
The MCC court roundly criticized the Beijing Metals 
opinion, noting that the opinion failed to include "any analysis of the 
Convention," and concluded that the opinion was "not particularly 
persuasive."17 Beijing Metals 
represents a distinct minority view and, in light of a recently issued 
advisory opinion regarding parol evidence, is unlikely to carry any 
weight in future decisions.
The Advisory Council on the United Nations Conventions on Contracts 
for the International Sale of Goods (the Council) was formed in 2001 to 
provide interpretive guidance on unresolved issues relating to the 
Convention.18 The Council's principal 
purpose "is to issue opinions relating to the interpretation and 
application of the Convention on request or on its own 
initiative."19
In its Opinion No. 3, the Council specifically addressed the parol 
evidence rule under the Convention.20 The 
Council initially noted that the Convention does not include any version 
of the parol evidence rule. Consistent with the MCCnMarble case 
(which the opinion cites), the Council emphasized that several 
Convention provisions _ notably Articles 8 and 11 _ require courts to 
consider statements and other relevant evidence when determining the 
effect of a contract's terms.21 The opinion 
did not dismiss the importance of a written agreement but noted that "a 
writing is one, but only one, of many circumstances to be considered 
when establishing and interpreting the terms of a contract."22 Accordingly, the Council concluded that the 
parol evidence rule has no application to a contract governed by the 
Convention.
The Council drew support for its opinion from the Convention's 
legislative history. It noted that the Canadian delegation had proposed 
including a version of the parol evidence rule, but the proposal 
garnered little support and eventually was rejected. The Council also 
suggested that the parol evidence rule is at odds with most of the 
world's legal systems, which "admit all relevant evidence in contract 
litigation."23 Finally, the Council 
observed that where the parol evidence rule does prevail, notably in the 
United States, it is marked by considerable variation and extreme 
complexity and is the subject of considerable criticism.24
Given the Council's opinion and the sound reasoning of both the 
opinion and MCC-Marble, the parol evidence rule is unlikely to 
find support in future commercial disputes litigated in the United 
States when the Convention governs the parties' agreement.
Merger Clauses Under the Convention
The Convention's acceptance of subjective intent to determine the 
party's agreement begs the question of whether a merger clause that 
extinguishes prior agreements not expressed in the writing will 
eliminate parol evidence problems. While a merger clause will provide 
some measure of protection against consideration of parol evidence, it 
is doubtful that such a clause will be a panacea to the parol evidence 
problem. In this regard, there is no reason to believe that a merger 
clause will be treated any differently from any other provision of a 
contract the Convention governs. Consistency demands that a merger 
clause be subjected to the same examination of facts and circumstances 
required by Article 8 to determine a party's intent as any other 
contractual provision. In fact, merger clauses appear to be uniquely 
prone to attack by parol evidence, since the parties' intent not to be 
bound by the merger clause could be demonstrated by the very evidence 
that the merger clause seeks to exclude _ prior understandings not 
expressed in the written agreement.
The Fifth Circuit addressed this question in its MCCnMarble 
opinion, concluding that a merger clause is the solution to parol 
evidence problems:
"[T]o the extent parties wish to avoid parol evidence problems they 
can do so by including a merger clause in their agreement that 
extinguishes any and all prior agreements and understandings not 
expressed in the writing."25
The court's comments (in dicta) on the effect of a merger clause are 
difficult to reconcile with the rest of its opinion. Indeed, given the 
unique circumstances of the case, in which there was evidence that 
neither side intended to be bound by certain terms of the written 
agreement, it is unimaginable that a merger clause would have altered 
the outcome.
In its Opinion No. 3, the Council also weighed in on the impact of a 
merger clause in a contract governed by the Convention. The Council 
began by noting that Article 6 of the Convention expressly permits 
parties to opt out of the Convention, in whole or in part: "The parties 
may exclude the application of this Convention or, subject to Article 
12, derogate from or vary the effect of any of its provisions." The 
Council next observed that a merger clause operates under Article 6 in 
derogation of Articles 8 and 11.26 A merger 
clause attempts to escape the impact of Article 8 by preventing 
"recourse to extrinsic evidence for the purposes of contract 
interpretation."27 Moreover, a merger 
clause attempts "to bar extrinsic evidence that would otherwise 
supplement or contradict the terms of the writing in derogation of 
Article 11, which provides that a sales contract may be proved by any 
means, including witnesses."28 Referring to 
the Fifth Circuit's opinion in MCCnMarble as authority for the 
proposition that a properly worded merger clause prevents the 
introduction of extrinsic evidence, the Council nevertheless refused to 
endorse a merger clause as a bulletproof shield against extrinsic 
evidence. Consistent with Article 8, the effect of a merger clause will 
ultimately depend on the parties' intent:
"[E]xtrinsic evidence should not be excluded, unless the parties 
actually intended the Merger Clause to have this effect. The question is 
to be resolved by reference to the criteria enunciated in Article 8, 
without reference to national law. Article 8 requires an examination of 
all relevant facts and circumstances when deciding whether the Merger 
Clause represents the parties' intent."29
Like a written agreement itself, a merger clause is only one of 
potentially many factors that must be considered to discern the parties' 
intent:
"Under the CISG, a Merger Clause does not generally have the effect 
of excluding extrinsic evidence for purposes of contract interpretation. 
However, the merger clause may prevent recourse to extrinsic evidence 
for this purpose if specific wording, together with all other relevant 
factors, make clear the parties' intent to derogate from Article 8 for 
purposes of contract interpretation."30
If, as Article 8 of the Convention prescribes, contract 
interpretation under the Convention is a matter of understanding the 
parties' intent, then a party to a contract governed by the Convention 
relies on a merger clause to preclude the introduction of extrinsic 
evidence at its peril. In light of the Council's opinion and its 
persuasive reasoning, it is unlikely that the dictum of 
MCCnMarble will find support in future opinions.
Conclusion
In a world that is rapidly losing its commercial boundaries, the 
Convention will continue to grow in prominence and play an increasingly 
important role in resolving commercial disputes. As a result, lawyers 
representing clients involved in international commerce and the 
resolution of international commercial disputes must be prepared to 
operate under a body of law that adopts concepts not recognized by the 
UCC (such as oral contracts) while eschewing other principles (such as 
the parol evidence rule) embodied in the UCC.
Endnotes
1The United Nations certified text 
is published at 52 Fed. Reg. 6262 (March 2, 1987).
2MCC-Marble Ceramic Ctr. Inc. v. 
Ceramica Nuova D'Agostino S.P.A., 144 F.3d 1384, 1389 (11th Cir. 
1998).
3Pace Law School, CISG 
Database.
4United Nations Convention on 
Contracts for the International Sale of Goods [hereinafter Convention], 
at Art. 1(1)(a).
5Convention, supra note 4, 
at Art. 6.
6BP Oil Int'l Ltd. v. Empresa 
Estatal Petroleos de Ecuador, 332 F.3d 333, 337 (5th Cir. 2003); 
Asante Techs. Inc. v. PMC-Sierra Inc., 164 F. Supp. 2d 1142, 1150 
(N.D. Cal. 2001).
7U.C.C. § 2-201.
8Convention, supra note 4, 
at Art. 11.
9U.C.C. § 2-202.
10MCC-Marble, 144 F.3d 
1384.
11Id. at 1389.
12Id.
13See, e.g., Supermicro 
Computer Inc. v. Digitechnic, 145 F. Supp. 2d 1147 (N.D. Cal. 2001); 
Shuttle Packaging Sys. L.L.C. v. Tsonakis, No. 1:01-CV-691, 2001 
U.S. Dist. LEXIS 21630 (W.D. Mich. Dec. 17, 2001); Fercus S.R.L. v. 
Palazzo, No. 98 Civ. 7728 (NRB), 2000 U.S. Dist. Lexis 11086 
(S.D.N.Y. Aug. 8, 2000).
14MCC-Marble, 144 F.3d at 
1391.
15Calzaturificio Claudia 
s.n.c. v. Olivieri Footwear Ltd., No. 96 Civ. 8052(HBYTHK), 1998 
U.S. Dist. LEXIS 4586 (S.D.N.Y. April 7, 1998); Mitchell Aircraft 
Spares Inc. v. European Aircraft Serv. A.B., 23 F. Supp. 2d 915 
(N.D. Ill. 1998).
16993 F.2d 1178, 1183 n.9 (5th 
Cir. 1993).
17MCC-Marble, 144 F.3d at 
1390.
18Dr. Loukas Mistelis, Council 
Publishes First Opinions.
19Id.
20CISG-AC 
Opinion No. 3,
 72 KB Parol 
Evidence Rule, Plain Meaning Rule, Contractual Merger Clause and the 
CISG, 23 Oct. 2004. Rapporteur: Prof. Richard Hyland, Rutgers Law 
School, Camden, N.J., USA [hereinafter Council Op. No. 3].
21Id. at § 2.1.
22Id. at § 2.2.
23Id. at § 2.4.
24Id.
25MCC-Marble, 144 F.3d at 
1391.
26Council Op. No. 3, supra 
note 20, at § 4.1
27Id.
28Id.
29Id. at § 4.5.
30Id. at § 4.6.
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