275 F.3d 88 (D.C. Cir. 2001)
James A. Curtin, et al., Appellantsv.United Airlines, Inc., Appellee
No. 00-7274
United States Court of Appeals  FOR THE DISTRICT OF COLUMBIA CIRCUIT
Argued October 10, 2001Decided December 28, 2001

Appeal from the United States District Court  for the District of Columbia (No. 99cv03056)
Leonard N. Bebchick argued the cause and filed the briefs  for appellants.
Frederick C. Schafrick argued the cause for appellee. With him on the brief was Timothy G. Lynch.
Before:  Sentelle, Randolph, and Garland, Circuit Judges.
Opinion for the Court filed by Circuit Judge Garland.
Garland, Circuit Judge:


1
Three United Airlines passengers,  on behalf of themselves and others similarly situated, sued  United under an international treaty known as the Warsaw  Convention to recover the value of baggage lost on international flights.  Without reaching the question of class certification, the district court granted summary judgment against  the three named plaintiffs, on the ground that each had  entered into an accord and satisfaction with United by accepting a check from the air carrier "in full and complete settlement of any and all claims."  We affirm the judgment of the  district court.


2
* In September 1998, James Curtin flew from Cork, Ireland  to Dulles Airport in Virginia.  After landing at Dulles, he  reported that a bag of golf clubs, estimated to be worth $921,  was missing.  In January 1999, Margaret Wombacher flew  from London to Chicago.  One of her bags never arrived in  Chicago, and she reported a loss of $1855.  In the same  month, David Simmons flew from London to Atlanta, connecting through Chicago.  His bag made it to Chicago but not to  Atlanta, and he filed a claim for $1355.


3
In response to the claims for compensation filed by Curtin  and Wombacher, United sent each a letter stating:


4
Because your itinerary involved an international destination, claim settlement is governed by the 'Warsaw Convention' which limits our liability to $635 due to loss, damage or delay.


5
J.A. at 35, 126.  It sent Simmons a slightly different letter,  which read:


6
As your trip involved international travel, payment for your loss is based on the weight of your checked bag. The maximum liability our company assumes is $9.07 per pound, up to 70 pounds per checked item unless excess valuation is declared and purchased prior to travel.  Our check for $635 in settlement for the missing property, will be mailed to you shortly.


7
J.A. at 116.  Subsequently, United mailed each plaintiff a  check for $635.  Above the endorsement line on each check  was the following legend:


8
By endorsement of this check payee(s) agree that the amount shown is accepted in full and complete settlement of any and all claims which payee(s) may have against United Air Lines, Inc., its connecting carriers, their agents or employees for loss, damage or delay sustained by reason of an incident involving a United flight.


9
J.A. at 36, 119, 127.  Curtin, Wombacher, and Simmons all  signed and deposited their checks, the latter after consulting  with an attorney.1


10
Article 18 of the Warsaw Convention, an international air  carriage treaty ratified by the United States in 1934, creates  a cause of action against an air carrier for loss of or damage  to a passenger's checked baggage.  49 U.S.C.  40105 note. Article 22(2) of the Convention limits a carrier's liability for  such loss to a maximum of 250 francs per kilogram, or $9.07  per pound.  See Trans World Airlines, Inc. v. Franklin Mint  Corp., 466 U.S. 243 (1984).  United calculated its liability to  each plaintiff as no more than $635--the amount it tendered  by check--because the maximum weight of a bag permitted  on its flights was 70 pounds.  Article 4(3) of the Convention,  however, requires that baggage checks contain certain particulars, including the number and weight of the bags, and  Article 4(4) states that "if the baggage check does not con tain" those particulars "the carrier shall not be entitled to  avail himself of those provisions of the convention which  exclude or limit his liability."  It is undisputed that United  did not record the weight of any of the plaintiffs' bags.


11
In Cruz v. American Airlines, Inc., 193 F.3d 526 (D.C. Cir.  1999), this circuit ruled that the plain language of Article 4(4)  precludes an air carrier's invocation of the liability limits of  Article 22(2) when it has not recorded the weight of the  baggage.  Cruz acknowledged that passengers are not prejudiced by an airline's failure to note a bag's weight if the  carrier's maximum weight allowance is used to determine the  amount of its liability, and that in such circumstances the  recording requirement "makes little real sense."  Id. at 529. Nonetheless, Cruz concluded that "the language of the Convention is unyielding and we have no warrant to dispense  with portions we might think purposeless."  Id.


12
This case was filed on November 17, 1999, five weeks after  the decision in Cruz.  The First Amended Complaint was  brought by Curtin, Wombacher, and Simmons, as a class  action on behalf of themselves and all others similarly situated.2  The class was defined as all persons who checked  baggage on an international United flight "without the weight  of that baggage having been recorded," and who received  payment of less than what they claimed was the fair value of  the loss of or damage to that baggage--such payment "being  an amount (usually $635) which United asserted or believed  was the limit of its liability for such baggage loss/damage  under Warsaw's Article 22(2) $9.07 per pound liability limitation."  First Am. Compl. p 5.  Plaintiffs proposed a class  period "beginning the two years prior to initiation of this suit  and ending on March 3, 1999."  Id.3  They claimed that they  were entitled to recover the full value of their lost or damaged baggage, and that the Warsaw Convention's liability  limit was inapplicable because the weight of their baggage  had not been recorded on their baggage checks.


13
United moved for summary judgment pursuant to Federal  Rule of Civil Procedure 56, raising the defense of accord and  satisfaction by virtue of plaintiffs' endorsement and deposit of  the checks that United had tendered in settlement of their  claims.  Plaintiffs countered that there were no valid accords  and satisfactions, and that even if there were, they should be  rescinded on the grounds of mistake and/or misrepresentation.  Plaintiffs also asked the district court to permit discovery and to rule on the issue of class certification before  addressing defendant's motion for summary judgment.  The  district court denied those requests and granted United's  motion.

II

14
We begin with two preliminary matters:  plaintiffs' contentions that the district court erred by deciding United's motion  for summary judgment (1) without permitting discovery and  (2) without ruling on the question of class certification.  The  first of these arguments is readily dispatched.  Although it is  true that summary judgment ordinarily "is proper only after  the plaintiff has been given adequate time for discovery,"  First Chicago Int'l v. United Exch. Co., 836 F.2d 1375, 1380  (D.C. Cir. 1988), plaintiffs' briefs fail to identify any facts  essential to opposing United's motion as to which discovery is  needed.  Moreover, at oral argument, plaintiffs agreed that in  light of factual concessions made by United below, all the  facts required to decide the summary judgment issue are  already in the record and further discovery is unnecessary. See also Appellants' Br. at 18, 27.  Accordingly, there is no  possible ground for reversing the district court's denial of  discovery.  See Moore v. United States, 213 F.3d 705, 710 n.3  (D.C. Cir. 2000) (holding that "a district court may deny  discovery requests when additional facts are not necessary to  resolve the summary judgment motion");  Fed. R. Civ. P. 56(f)  (providing that the court may continue an application for  summary judgment to give time for discovery if the opposing  party "cannot ... present by affidavit facts essential to  justify the party's opposition").


15
The certification issue detains us only slightly longer.  The  plaintiffs assert that the district court was obliged to determine whether their suit could proceed as a class action before  it could consider the merits of their individual claims, in light  of Federal Rule of Civil Procedure 23(c) and the Supreme  Court's holding in Eisen v. Carlisle & Jacquelin, 417 U.S. 156  (1979).  Neither of these authorities, however, suggests that a  court is barred from rendering an easy decision on an individual claim to avoid an unnecessary and harder decision on the  propriety of certification.


16
We begin with Rule 23(c), which states only that the  district court shall determine whether a case may be maintained as a class action "[a]s soon as practicable after the  commencement of [the] action."  As the Seventh Circuit has  noted, although a certification decision will usually be "practicable" before the case is ripe for summary judgment, that will  not always be so, and the word " 'practicable' allows for  wiggle room"--enough to make the order of disposition of  motions for summary judgment and class certification a question of discretion for the trial court.  Cowen v. Bank United  of Texas, 70 F.3d 937, 941 (7th Cir. 1995);  see Telfair v. First  Union Mortgage Corp., 216 F.3d 1333, 1343 (11th Cir. 2000); Thompson v. County of Medina, 29 F.3d 238, 240-41 (6th Cir.  1994);  Adamson v. Bowen, 855 F.2d 668, 677 n.12 (10th Cir.  1988);  Christensen v. Kiewit-Murdock Inv. Corp., 815 F.2d  206, 214 (2d Cir. 1987);  Wright v. Schock, 742 F.2d 541, 544  (9th Cir. 1984).


17
Nor is Eisen to the contrary.  There, the Court reversed a  district court that had held a preliminary hearing on the  merits of the case in order to decide whether the plaintiff should be required to bear the cost of notice to the members  of the asserted class.  "We find nothing in either the language or history of Rule 23," the Court said, "that gives a  court any authority to conduct a preliminary inquiry into the  merits of a suit in order to determine whether it may be  maintained as a class action."  Eisen, 417 U.S. at 177  (emphasis added).4  Nothing of the sort occurred here.  The  district court did not conduct a preliminary inquiry, but  rather reached a final resolution on summary judgment.5 Moreover, it did so to determine not whether the case could  be maintained as a class action, but rather whether any of the  named plaintiffs had a viable claim on the merits.  Under  such circumstances, nothing in Eisen or Rule 23(c) requires  the district court to rule on class certification before granting  or denying a motion for summary judgment.  See Thompson,  29 F.3d at 240-41;  Wright, 742 F.2d at 544-46.


18
As plaintiffs note, it is often more efficient and fairer to the  parties to decide the class question first.  But that was not so  in this case where, as we discuss below, the district court  readily and correctly perceived fatal flaws in plaintiffs' claims. Reversing the usual order of disposition in such circumstances spares both the parties and the court a needless,  time-consuming inquiry into certification.  See Federal Judicial Center, Manual for Complex Litigation (Third)  30.11  (1995) (stating that "[w]hen it is clear that the action lacks  merit, dismissal [before certification] will avoid unnecessary  expense for the parties and burdens for the court").


19
Plaintiffs also observe that it is often more protective of the  interests of defendants to begin with the issue of class  certification, because only a merits decision made after certification will bind all members of the class.  But here, the  defendant itself sought an early decision on the merits and,  needless to say, does not suggest that it was prejudiced by  winning on that basis.  Nor do the named plaintiffs suggest  any prejudice to their own interests traceable to the order in  which the district court made its decision, rather than to the  decision itself.  The plaintiffs do contend that, due to the  passage of time since the lawsuit began, when the suit is  dismissed putative class members "will be left holding a time  barred claim."  Appellants' Br. at 22.  That contention, however, is simply incorrect.  The filing of a class action tolls the  statute of limitations as to all asserted members of the class,  and potential plaintiffs other than the three named in this  case remain free to file their own suits against United.  See  Crown, Cork & Seal Co. v. Parker, 462 U.S. 345, 353-54  (1983).  They will, of course, face the problem of stare decisis  (at least in this circuit), but even so their legal position is  better than it would be if the merits decision had been made  after class certification--in which case they would face the  bar of res judicata.


20
In sum, in circumstances like these, where the merits of the  plaintiffs' claims can be readily resolved on summary judgment, where the defendant seeks an early disposition of those  claims, and where the plaintiffs are not prejudiced thereby, a  district court does not abuse its discretion by resolving the  merits before considering the question of class certification.

III

21
We now turn to plaintiffs' challenge to the district court's  grant of summary judgment in favor of United on the ground  that plaintiffs' damage claims are barred by the doctrine of  accord and satisfaction.  We review the district court's decision to grant summary judgment de novo, and may affirm only if there is no genuine issue of material fact and the  moving party is entitled to judgment as a matter of law. Borgo v. Goldin, 204 F.3d 251, 254 (D.C. Cir. 2000) (citing  Anderson v. Liberty Lobby, Inc., 477 U.S. 242, 247 (1986)).


22
Plaintiffs contend that (1) there were no valid accords and  satisfactions in this case, and (2) even if there were, they  should be rescinded on the grounds of mistake and/or misrepresentation.  We consider each of these arguments below. Plaintiffs maintain that we should look to federal common law  to decide these issues, while United urges us to look to the  law of each individual passenger's domicile.  That, however, is  a dispute we need not resolve.  Both sides agree that the  Uniform Commercial Code (U.C.C.) and the Restatement  (Second) of Contracts provide the applicable legal standards  regardless of which law governs.6  And neither side cites any  case to suggest that the choice of law would effect a difference in the interpretation of the relevant U.C.C. or Restatement provisions.


23
* U.C.C.   3-311 is entitled "Accord and Satisfaction by Use  of Instrument."  It provides, with exceptions not relevant  here, that a claim is discharged if the person against whom  the claim is asserted proves that:  "(i) that person in good  faith tendered an instrument to the claimant as full satisfaction of the claim, (ii) the amount of the claim was unliquidated  or subject to a bona fide dispute, and (iii) the claimant  obtained payment of the instrument."  U.C.C.  3-311(a).  In  addition, the instrument or an accompanying written communication must contain "a conspicuous statement to the effect  that the instrument was tendered as full satisfaction of the  claim."  U.C.C.  3-311(b).7


24
The district court held that United's tender to each plaintiff  of a check for $635, stamped with the legend that the payee's  endorsement would constitute acceptance in "full and complete settlement of any and all claims which payee(s) may  have against United Air Lines, Inc.," became an effective  accord and satisfaction when the plaintiff signed and deposited the check.  See U.C.C.  3-311 cmts. 2, 3 (noting that an  accord and satisfaction occurs when a seller deposits a check  marked with the notation that it is in full satisfaction of a  bill).  On appeal, plaintiffs' challenge relies only upon the  second U.C.C. requirement:  that the amount of the claim be  unliquidated.  The Restatement defines an "unliquidated"  obligation as one "that is uncertain or disputed in amount."  74 cmt. c.  Plaintiffs contend that United's correspondence  conceded the carrier's liability for $635, and thereby showed


25
that United regarded each claim as an undisputed, "liquidated  claim for $635."  Appellants' Br. at 10.


26
At oral argument, plaintiffs agreed that, at least if considered in isolation, the legend stamped on United's checks  indicated United's view that the amount in question was not  undisputed, since it stated that endorsement would constitute  "settlement" of all claims.  Nonetheless, plaintiffs contend  that the clarity of the check legend was muddied by United's  earlier letters.  Those letters, plaintiffs assert, did not demonstrate an intention to compromise or settle, but instead  flatly stated that United's liability was limited to $635--and  thus rendered that amount a liquidated claim.


27
This argument has two principal defects.  First, the language of the letters that United sent to the plaintiffs is not  materially different from the language on the checks.  Like  the checks, all three letters used the word "settlement" to  describe the nature of the transaction between the parties.8 Second, and more important, there is simply no question but  that the parties did consider the amount of the claims to be in  dispute, and hence that the $635 figure was far from "liquidated."  The three plaintiffs clearly did not regard $635 as  the amount they were owed, since their demands were for  $921, $1855, and $1355.  Nor did United signal agreement  that the amount it owed was in fact $635.  Rather, the carrier  described $635 as the "limit[ ]" or "maximum" of its liability. That figure was calculated solely on the basis of the maximum  weight of plaintiffs' luggage, and could have been reduced had  United successfully challenged plaintiffs' estimates of the  value of the bags' contents.9


28
There is only one way in which the $635 tendered by  United could be considered evidence of a liquidated claim:  if  it were the law that a debtor automatically turns a debt (or a  portion thereof) into a liquidated sum simply by offering a  fixed amount in settlement.  But if that were the law, there  would be no such thing as an accord and satisfaction:  every  offer to settle a debt would liquidate the debt (at least to the  extent of the offer), rendering every such offer ineligible  under U.C.C.  3-311(a)(ii).  In this case, in order to discharge a claim, United paid more than it conceded owing and  plaintiffs accepted less than they conceded being owed.  That  is more than sufficient to satisfy U.C.C.  3-311(a)(ii),10 and  the fact that the amount accepted was the same as the  amount tendered no more justifies calling plaintiffs' claims  "liquidated" than it would those in any other dispute.  Accordingly, we conclude that the tender, endorsement, and  deposit of each check constituted a valid accord and satisfaction.11

B

29
Finally, plaintiffs contend that, even if there were valid  accords and satisfactions in this case, they should be rescinded on the grounds of mistake (unilateral or mutual) and/or  misrepresentation.12  For either doctrine to apply in this case,  United's statements to plaintiffs must--at a minimum--have  been "not in accord with the facts."13  The point that was not  in accord with the facts here, plaintiffs contend, was United's  claim that its maximum liability was limited to $635, the  product of $9.07 and the maximum weight of each plaintiff's  lost bag.  Plaintiffs argue that, because the Warsaw Convention's liability limit applied only if United's baggage checks  recorded the bags' actual weights, and because United's  checks concededly did not do so, United's claim that there  was any limit to its liability at all (other than the fair value of  the lost baggage) was in error.


30
Had United's letters been sent or its checks tendered or  deposited after this court's decision in Cruz, plaintiffs might  have an argument for their position.  But all of those events  transpired months before Cruz was issued,14 and that subsequent decision can therefore play no role in the analysis. Instead, we must look to the state of the law at the time of  the events in question.  See Restatement (Second) of Contracts  152 (providing that a mutual mistake capable of  voiding a contract must be a mistake "at the time contract was made");  id.  153 (same with respect to unilateral mistake);  id.  159 cmt. c ("An assertion must relate to  something that is a fact at the time the assertion is made in  order to be a misrepresentation.").  At that time, the applicability of Article 22(2)'s liability limit in the absence of the  recording of weights required by Article 4 was an unsettled  question, and the existing law provided a more than adequate  basis for United to conclude that its view was correct.  Cf.  Moses-Ecco Co. v. Roscoe-Ajax Corp., 320 F.2d 685, 690  (D.C. Cir. 1963) (holding that "a settlement payment, made  when the law was uncertain, cannot be successfully attacked  on the basis of any subsequent resolution of the uncertainty").


31
When the accords and satisfactions in this case were  reached, no Supreme Court or D.C. Circuit case had yet  addressed the question subsequently decided in Cruz.15  The  only federal appellate court to have considered the question,  the Second Circuit, had held--consistent with United's view-that the liability limit of Article 22(2) continued to apply  notwithstanding a failure to follow the requirements of Article  4.16  Two of the three state appellate courts to have ruled had  also decided in accord with United's position.17  So, too, had  many federal district judges,18 including all that had ruled in  this circuit,19 although district courts had ruled the other way  as well.20  Moreover, the position expressed in United's letters was supported by advice to passengers published by the  United States Department of Transportation.  See Aviation  Consumer Prot. Div., U.S. Dep't of Transp., Fly Rights:  A  Consumer Guide to Air Travel ch. 5 (10th rev. ed. 1994)  (stating that an airline may limit its liability under the  Warsaw Convention to $9.07 per pound if, "[i]nstead of weighing [the] luggage, the carrier assumes that each of [the] bags  weighs the maximum that it agrees to accept as checked  baggage, usually 70 pounds," and noting that this "yields a  liability limit of about $640 per bag").


32
The plaintiffs have cited no authority, in any jurisdiction,  suggesting that when an issue of law is unsettled, a party makes a misrepresentation or mistake by reaching a conclusion that is well supported by existing law.  Measuring  United's statement against the state of the law at the relevant  time, we reject plaintiffs' contention that the accords and  satisfactions are void for misrepresentation or mistake.21

IV

33
We find no abuse of discretion in the district court's  decision to rule on United's motion for summary judgment  without first permitting discovery or ruling on class certification.  Nor do we discern any error in the district court's  grant of summary judgment in United's favor.  Accordingly,  the judgment of the district court is


34
Affirmed.



Notes:


1
 Wombacher signed only after inserting the word "not" before  the phrase "accepted in full and complete settlement" on the back of  the check.  The district court held that the validity of the release  was not affected by the insertion of "not."  Curtin v. United  Airlines, Inc., 120 F. Supp. 2d 73, 77 n.2 (D.D.C. 2000) (citing  Restatement (Second) of Contracts  281 cmt. d, illus. 6 (1979)  (explaining that a creditor cannot avoid the consequences of cashing  a check offered as payment in full by declaring that he regards it as  part payment));  see U.C.C.  3-311 cmt. 2 (noting that a seller who  deposits a check accepts the accord notwithstanding that he "adds a  notation to the check indicating that the check is accepted under  protest or in only partial satisfaction of the claim").  Plaintiffs do  not challenge that ruling on appeal.


2
 Curtin was the only plaintiff named in the original complaint. The court granted subsequent petitions by Wombacher and Simmons to intervene as additional plaintiffs and putative class representatives.  J.A. at 83.


3
 Effective March 4, 1999, amendments to the Warsaw Convention eliminated Article 4's requirement that the weight of checked  baggage be recorded.  Montreal Protocol No. 4 to Amend the  Convention for the Unification of Certain Rules Relating to International Carriage by Air, signed at Warsaw on October 12, 1929, as  amended by the Protocol Done at the Hague on September 8, 1955,  reprinted in S. Exec. Rep. No. 105-20, at 21-32 (1998).


4
 See also Miller v. Mackey Int'l, Inc., 452 F.2d 424, 437 (5th Cir.  1971) ("In determining the propriety of a class action, the question  is not whether the plaintiff or plaintiffs have stated a cause of action  or will prevail on the merits, but rather whether the requirements  of Rule 23 are met." (emphasis added)), quoted in Eisen, 417 U.S.  at 178.


5
 In Eisen, the Court expressed concern "that a preliminary  determination of the merits may result in substantial prejudice to a  defendant, since ... [t]he court's tentative findings, made in the  absence of established [trial] safeguards, may color the subsequent  proceedings...."  417 U.S. at 178.


6
 All arguably relevant jurisdictions--Colorado (Curtin's and  Wombacher's domicile), Georgia (Simmons' domicile and where his  bag was reported missing), Illinois (United's principal place of  business and where Wombacher's bag was reported missing), and  Virginia (where Curtin's bag was reported missing)--have enacted  U.C.C.  3-311, which establishes the elements of accord and  satisfaction.  See Colo. Rev. Stat.  4-3-311;  Ga. Code Ann.   11-3-311;  810 Ill. Comp. Stat. Ann. 5/3-311;  Va. Code Ann.   8.3A-311;  see also Curtin v. United Airlines, Inc., 120 F. Supp.  2d 73, 76 n.1 (finding that "all relevant jurisdictions rely on the  U.C.C.  3-311 and Restatement (Second) of Contracts  281 definitions of accord and satisfaction, which codify the common law  doctrine").  Courts also often look to the U.C.C. and Restatement  when deciding questions of federal common law.  See, e.g., O'Neill  v. United States, 50 F.3d 677, 684 (9th Cir. 1995) (relying on the  U.C.C. as "a source of federal common law");  FDIC v. Tennessee  Wildcat Servs., Inc., 839 F.2d 251, 253 (6th Cir. 1988) (same);  see  also, e.g., Bowden v. United States, 106 F.3d 433, 439 (D.C. Cir.  1997) (explaining that the principles of the Restatement (Second) of  Contracts are those "from which we would be inclined to fashion a  federal common-law rule");  Turner v. American Fed'n of Teachers  Local 1565, 138 F.3d 878, 882 (11th Cir. 1998) (using the Restatement (Second) of Contracts as a source of federal common law).


7
 The Restatement provides that "[a]n accord is a contract under  which an obligee promises to accept a substituted performance in  future satisfaction of the obligor's duty,"  281 cmt. a, and that  "[p]erformance of the accord discharges the original duty,"  281(1). It further states that "[t]he enforceability of an accord is governed  by the rules applicable to the enforceability of contracts in general."  281 cmt. d.


8
 See J.A. 35, 126 (letters to Curtin and Wombacher, stating that  "claim settlement" is governed by the Warsaw Convention);  J.A.  116 (letter to Simmons, stating that United's check for $635 "in  settlement" will be mailed shortly).


9
 Moreover, even "[a]n admission by the obligor that a minimum  amount is due does not liquidate the claim even partially unless he  is contractually bound to the admission."  Restatement (Second) of  Contracts  74 cmt. c.


10
 The U.C.C. does not require that the party against whom the  claim is asserted offer an amount different from the amount it  believes it owes.  Rather, the party "against whom the claim is  asserted may attempt an accord and satisfaction of the disputed  claim by tendering a check to the claimant for some amount less  than the full amount claimed by the claimant"--just as United did  here.  U.C.C.  3-311 cmt. 1.


11
 Plaintiffs also argue that the printed legend on United's checks  demonstrated an absence of the good faith necessary for a valid  accord and satisfaction.  In support, they cite U.C.C.  3-311 cmt.  4.  That comment, however, refers only to "the practice of some  business debtors in routinely printing full satisfaction language" on  all or most of their checks, "whether or not there is any dispute  with the creditor."  In such cases, the comment states, "the claimant cannot be sure whether a tender in full satisfaction is or is not  being made," and the practice may therefore "prevent an accord  and satisfaction on the ground that the check was not tendered in  good faith."  Here, plaintiffs assert neither that United routinely  printed the settlement legend on its checks, nor that they did not  understand that tenders in full satisfaction were being made to  them.


12
 See U.C.C.  1-103 (providing that "the principles of law and  equity, including ... the law relative to ... misrepresentation ...  [and] mistake," shall "supplement" the provisions of the U.C.C.); Restatement (Second) of Contracts  152 (entitled "When Mistake  of Both Parties Makes a Contract Voidable");  id.  153 (entitled  "When Mistake of One Party Makes a Contract Voidable");  id.   164 (entitled "When a Misrepresentation Makes a Contract Voidable").


13
 See Restatement (Second) of Contracts  151 ("A mistake is a  belief that is not in accord with the facts.");  id.  159 ("A misrepresentation is an assertion that is not in accord with the facts.");  see  also id.  151 cmt. b (stating that "[f]acts include law" and that "party's erroneous belief with respect to the law ... may, therefore,  come within these rules");  id.  170 cmt. a ("A statement as to a  matter of law is subject to the same rules as are other assertions.").


14
 The letters to Curtin, Wombacher, and Simmons were mailed  in February, May, and March of 1999, respectively.  The plaintiffs  deposited their checks between March and June of 1999.  See J.A.  36, 119, 127.  Cruz did not issue until October 12, 1999.


15
 Plaintiffs call our attention to Chan v. Korean Air Lines, Inc.,  490 U.S. 122 (1989), a case that did not involve the baggage liability  limitation question at issue here.  Chan held that Article 3 of the  Warsaw Convention does not eliminate the Convention's limitation  on damages for passenger injury or death when the carrier fails to  provide adequate notice of the limitation on its passenger tickets. Id. at 135.  Although the Court held that its decision in Chan was  "governed by the text" of the Convention, id. at 134, it had no  occasion to consider the text of Article 4 or its meaning.


16
  See Republic Nat'l Bank of N.Y. v. Eastern Airlines, Inc., 815  F.2d 232 (2d Cir. 1987) (regarding commercial shippers).


17
 See Feeney v. America West Airlines, 948 P.2d 110 (Colo. Ct.  App. 1997);  Hibbard v. Trans World Airlines, Inc., 592 N.E.2d 889  (Ohio Ct. App. 1990).  But see Arkin v. New York Helicopter Corp.,  544 N.Y.S.2d 343 (App. Div. 1989).


18
 See, e.g., Tseng v. El Al Israel Airlines, Ltd., 919 F. Supp. 155,  160 (S.D.N.Y. 1996), aff'd with respect to plaintiff's baggage claim,  122 F.3d 99, 107 (2d Cir. 1997), rev'd on other grounds, 525 U.S. 155  (1999);  Gonzales v. TACA Int'l Airlines, No. 91-0175, 1992 U.S.  Dist. LEXIS 9111 (E.D. La. June 17, 1992);  Klein v. Northwest  Airlines, No. C-90-3174, 1991 U.S. Dist. LEXIS 10614 (N.D. Cal.  July 17, 1991);  Abbaa v. Pan Am. World Airways, Inc., 673  F. Supp. 991 (D. Minn. 1987).


19
 See Cruz v. American Airlines, Inc., No. 96-02817, Mem. Op.  at 16-17 (D.D.C. Oct. 24, 1997), rev'd, 193 F.3d 526 (D.C. Cir. 1999); Martin v. Pan Am. World Airways, Inc., 563 F. Supp. 135 (D.D.C.  1983).


20
 See, e.g., Tchokponhove v. Air Afrique, 953 F. Supp. 79  (S.D.N.Y. 1996);  Siben v. American Airlines, Inc., 913 F. Supp. 271  (S.D.N.Y. 1996);  Da Rosa v. Tap Air Portugal, 796 F. Supp. 1508  (S.D. Fla. 1992);  Vekris v. Peoples Express Airlines, Inc., 707  F. Supp. 675 (S.D.N.Y. 1988);  Maghsoudi v. Pan Am. World  Airways, Inc., 470 F. Supp. 1275 (D. Haw. 1979).


21
 Because we conclude that there was no misrepresentation (or  mistake), we need not address the "troublesome" issue of when one  party's reliance on an assertion as to a matter of law by another  party is justified.  Restatement (Second) of Contracts  164 cmt.  d;  see id.  170.


