This appeal arises out of one of the many cases that were filed against Ford Motor Company and Bridgestone/Fire-stone, Inc. (now known as Bridgestone Firestone North American Tire, LLC), after some Firestone tires installed on Ford Explorers exploded, often with catastrophic consequences. Although most of those lawsuits involved U.S. citizens who were driving their cars within the United States, a certain number involved foreigners. This is one of the latter group: it was brought by the family of José Samuel Ma-ñez-Reyes, who was killed in Veracruz, Mexico, in one such accident. In an earlier opinion, this court reviewed a decision by the district court to dismiss the
Memez
litigation under the doctrine of
forum non conveniens,
on the ground that a forum in Mexico would be available and more appropriate.
In re Bridgestone/Firestone, Inc.,
The earlier appeal took an unexpected turn when the plaintiffs submitted documents indicating that the Fourth Court of First Instance for Civil Cases of the First Judicial District in Morelos, Mexico, had concluded (contrary to the district court’s expectation) that it did not have jurisdiction over the case. In supplemental filings before this court, plaintiffs argued that this demonstrated conclusively that the courts of Mexico were not available to hear the case and thus that a dismissal for
forum non conveniens
was improper. See generally
Gulf Oil Corp. v. Gilbert,
The district court accordingly held an evidentiary hearing on remand to explore the circumstances surrounding the More-los court’s decision. Ultimately, the court had to decide whether the plaintiffs brought that case in good faith and whether the Mexican court’s decision was entitled to recognition in the U.S. action. The district court concluded that the Morelos judgment had indeed been procured in bad faith and thus was not subject to recognition. The court therefore reaffirmed its earlier decision to dismiss the Mañez litigation on the ground oí forum non conve-niens.
With that judgment in hand, defendants moved for an order imposing sanctions against plaintiffs’ U.S. and Mexican lawyers. Initially, the district court refrained from taking that step, because it believed that any fraud that may have been perpetrated was directed to this court, not the district court. Upon reconsideration, however, the court concluded that the court of appeals no longer had jurisdiction over the motion for sanctions, because no proceeding was then pending there. In addition, the court noted that it, too, was arguably the victim of vexatious and unreasonable proceedings, as described in 28 U.S.C. § 1927. It therefore imposed a fine of $50,000 as a sanction against plaintiffs’ U.S. lawyers, to be divided among the defendants in any way that defendants thought appropriate. In addition, the court singled out the appellant before us, Leonel Pereznieto-Castro, for a particular sanction:
*583 Further, Dr. Leonel Pereznieto, the apparent mastermind behind these frauds on the U.S. and Mexican courts, is ordered to pay over, as a personal sanction, the amount of one hundred thousand dollars ($100,000.00). Fifty thousand dollars ($50,000.00) of that amount is payable to Defendants as an additional offset against the expenses they incurred in investigating the More-los proceedings and litigating the remand issues and the second fifty thousand dollars is payable to the Clerk of this court as a sanction for the fraud perpetrated by him in this forum. So long as this monetary sanction remains unpaid in the full amount of $100,000, Leonel Pereznieto is and shall be barred from providing any testimony against any Defendant in this cause in any United States court. Further, in terms of resolving the remaining cases in this multidistrict litigation, any and all sworn assertions reflecting the views or opinions of Leonel Pereznieto, whether made by him directly or indirectly, shall be stricken and we shall not consider as authority cases where his testimony whether oral or written was relied upon as justification for the court’s opinion.
The court concluded by ordering that its sanctions judgment should be issued under Fed.R.Civ.P. 58(d), and that the dismissal of the case as a whole would be without prejudice. (Here and throughout this opinion we cite to the version of the Federal Rules of Civil Procedure that took effect on December 1, 2007, unless it appears that it would not be “just and practicable” to apply the new rules to this pending case.)
The fact that the dismissal was without prejudice raises the question whether the judgment before us is final for purposes of 28 U.S.C. § 1291. We conclude that it was, given the nature of a dismissal based on
forum non conveniens.
First, we note the obvious difference between dismissing a case on this ground and refusing to dismiss and thereby permitting the litigation to continue. The latter kind of order is nonflnal and does not fall within the narrow confines of the collateral order doctrine. See
Van Cauwenberghe v. Biard,
In this context, therefore, the phrase “without prejudice” means that although the dismissal is “final” in the sense that plaintiffs are finished before the U.S. courts, they still are free to refile the case in another, appropriate forum, and (at least to the extent that a U.S. court is in a position to assure such a thing) such a refiling would not be subject to a defense based on former adjudication. See
Esfeld v. Costa Crociere, S.P.A.,
This situation is not unlike a dismissal for lack of personal or federal subject-matter jurisdiction, which, while foreclosing future litigation of the matter in the court issuing the order, does not preclude a plaintiff from refiling and litigating in a proper forum. See,
e.g., Milwaukee Concrete Studios, Ltd. v. Fjeld Mfg. Co., Inc., 8
F.3d 441, 448 (7th Cir.1993) (taking appellate jurisdiction and affirming the district court’s dismissal without prejudice on grounds of improper venue because of insufficient contacts to confer personal jurisdiction but noting that refiling in a proper venue remains an option);
Fuhrman v. Livaditis,
Returning to the case presently before us, it is Pereznieto who has appealed. His complaint is not about the dismissal of the underlying action, but instead is about the order imposing sanctions on him. This order, we conclude, is also final for purposes of appeal; the district court is finished with him, and the only thing that remains is for him to pay the fine that it imposed, unless he can obtain relief on appeal. See
United States v. Dowell,
I
A few more details about the conduct for which Pereznieto was sanctioned help to explain the district court’s action. After the case was remanded to the district court, the parties spent nearly a year in discovery. The court then held a two-day evidentiary hearing. The evidence presented showed that plaintiffs’ U.S. lawyers, Roger Reed and Alberto Guerrero, had hired Mexican lawyers on a contingent-fee basis after the initial appeal had been filed in this court, and that they did so for the express purpose of filing a deficient complaint in an improper Mexican court. The idea was to file something that the Morelos courts would dismiss, so that plaintiffs could present “proof’ to this court that Mexico was not an available alternative forum. The Mexican attorney in charge of this strategy was Pereznieto — a Mexican citizen and attorney whom plaintiffs’ U.S. lawyers knew because he previously had filed an expert declaration in support of their claims in the U.S. courts. Pereznieto in turn hired two other Mexican lawyers to assist him, Juan Carlos Guerrero-Valle and Rosa Maria Avila-Fernandez.
The district court found that the evidence, including a “smoking gun” email sent on January 14, 2005, showed that the Mexican attorneys improperly had used family connections and had ex parte contact with the Morelos judge in order to manipulate the system and ensure that the judge would “throw out the suit according *585 to what we planned.” Pereznieto, the court found, had “played a double role in this attempted fraud on the court,” both by orchestrating the proceedings in Morelos and by submitting an “expert affidavit” to the Seventh Circuit in support of the plaintiffs’ arguments while the initial appeal was pending. At no time did Pereznieto disclose the circumstances of the Mexican proceedings to the U.S. courts, nor did he mention that he was representing the plaintiffs on a contingent-fee basis in Mexico (in itself, a lawful arrangement) while at the same time giving sworn statements as an expert in the U.S. proceedings. These findings provided the basis for the sanctions order we set forth above.
II
In his appeal, Pereznieto raises three principal arguments: that the district court lacked jurisdiction to impose sanctions against him; that the district court did not observe the requirements of due process; and that the court erred in its findings about the Mexican proceedings and Mexican law.
A
We consider first Pereznieto’s jurisdictional argument. To the extent that he is challenging the district court’s subject-matter jurisdiction to investigate the circumstances behind his filings and to impose sanctions for fraud or misconduct, we reject his argument. In
Chambers v. NASCO, Inc.,
Whether the court had authority under 28 U.S.C. § 1927 to punish someone in Pereznieto’s position is another question. Section 1927 permits sanctions only against “[a]ny attorney or other person admitted to conduct cases in any court of the United States or any Territory thereof.” Pereznieto is neither, and so the court’s sanction was not authorized by § 1927. That is not, however, a point that affects the court’s jurisdiction; it simply means that the sanction must stand or fall on some other ground. The fact that some of the conduct that ultimately gave rise to the filings in the U.S. court took place outside the United States (here, in Mexico) does not deprive the court of its competence to adjudicate this matter. Compare
F. Hojfmann-La Roche Ltd. v. Empagran S.A.,
This case is not like
United Phosphorus, Ltd. v. Angus Chemical Co.,
Insofar as Pereznieto is objecting to the court’s exercise of personal jurisdiction, he runs into a somewhat different problem. He was not a defendant, “haled” into the U.S. federal district court against his will. See,
e.g., World-Wide Volkswagen Corp. v. Woodson,
There are two questions here: first, to the extent that the district court imposed sanctions against Pereznieto for representations he made, directly or indirectly, to the district court or this court, is it permissible to conclude that Pereznieto submitted himself to the personal jurisdiction of the court for purposes of anything arising out of those filings; second, to the extent that the district court imposed sanctions against Pereznieto for actions he took before the Morelos courts, in Mexico, what, if anything, justifies bringing Pereznieto before the U.S. court?
In the affidavit he submitted in conjunction with the proceedings on remand, Per-eznieto stated:
1. My involvement in this case, and others involving “roll over” cases against the Defendants here and others [sic], initially arose in consulting capacity based on experience and training in conflict of law, Mexican law, and particularly, issues of “territorial competence” of Mexican Courts (much akin to U.S. jurisdictional issues).
2. In this capacity I have consulted and/or provided declarations or opinions in 20 U.S. cases.
* *
4. However, in this case, U.S. attorneys Reed, Guerrero and Dubose (hereinafter collectively “American Lawyers”) approached me regarding initiation of litigation in Mexican Courts, first, to establish a Mexican “estate”, and, second, to pursue a claim of the estate in a Mexican Court.
* * *
10. I did send, with the other Mexican lawyers, the letter attached as Exhibit “B”, which I understand was sent to the *587 Court by the American Lawyers by transmittal letter Exhibit “C”.
Although it is not entirely clear to which “Exhibit B” Pereznieto was referring in paragraph 10 of his affidavit, there is no doubt that Pereznieto allowed at least one document to be filed directly with a U.S. court. While Memez I was pending in this court, Pereznieto filed an affidavit discussing the Morelos proceedings. It began with the caption of the case, showing our docket number (No. 04-1827), leaving no doubt that he meant to file the affidavit with this court; it concluded with Perez-nieto’s signature. The affidavit was signed on July 6, 2005, in Mexico City, with the statement that it was executed “under penalty of perjury under the laws of the State of Illinois, the United States of American, and Mexico.”
The district court was entitled to exercise personal jurisdiction over Pereznieto (putting to one side for the moment questions of proper notice and proper service of papers) if Pereznieto had the kind of contacts with Indiana specified in its Trial Rule 4.4(A) (which serves as Indiana’s long-arm provision, see
LinkAmerica Corp. v. Albert,
Although it is conceivable that one might argue that Pereznieto also consented to the court’s jurisdiction, by the act of furnishing his affidavit to be filed in the Seventh Circuit, we prefer not to reach that question. It was plaintiffs’ U.S. law *588 yers who actually submitted Pereznieto’s affidavit to the district court. He never appeared personally, he never had his deposition taken (for this case) within the United States, nor in the end did he consent to a deposition in Mexico. We thus proceed on the basis only of specific adjudicatory jurisdiction, which supports the district court’s power to resolve issues arising out of Pereznieto’s actions directed to the Indiana litigation.
Finally, we consider the question whether the district court had any authority to evaluate Pereznieto’s actions before the Mexican courts, apart from anything he reported back to the U.S. lawyers or courts. We think not (and, indeed, the district court may not have meant to do any such thing). Whether the proceedings in Morelos were conducted in an honest and upright manner is a matter for the Mexican judicial and bar authorities, not for us. We are not in a position to draw any conclusion, positive or negative, even though we are aware that the problem of corruption within the judicial sector is one that plagues scores of countries around the globe, as the 2007 Report of the organization Transparency International documents in detail. See http://www. transparency.org/publications/gcr/ downloacLgcr (last visited Mar. 3, 2008). As the famous Operation Greylord investigation in Chicago during the 1980s illustrated, courts in the United States are not exempt from this plague. See http://www. fbi.gov/page2/march04/greylord031504.htm (last visited Mar. 3, 2008). We therefore focus only on Pereznieto’s actions that were directed toward the proceedings in the United States.
B
Pereznieto’s central argument is that the proceedings that led to the court’s sanctions order against him did not satisfy basic due process standards. He is supported in this effort by the Consulate General of Mexico in Chicago, appearing amicus curiae on behalf of the Ministry of Foreign Affairs of the United Mexican States. A few more background facts are important at this point. Pereznieto emphasizes time and again that he was never a party to the action before the district court, that he did not appear as counsel in the district court, and that he is not admitted to practice in the Southern District of Indiana. He is a citizen and resident of Mexico. He also points out that there was never a court order directing him to do anything. Instead, when the case returned to the district court after Mañez I, the assigned magistrate judge stated, in connection with a possible deposition of Pereznieto, that “this court likely has no authority to require Mexican counsel to travel to the United States to be deposed.” Instead, the judge directed in December 2005 that he should be deposed in Mexico City. Ford and Firestone noticed depositions in accordance with that order, but they never attempted to serve any subpoenas, court orders, letters of request, or letters rogatory on him there. Prior to a court-ordered status conference in mid-July 2006, Pereznieto and the other Mexican lawyers notified plaintiffs’ U.S. lawyers that they were refusing to be deposed. They cited both rules of professional secrecy and the risk of criminal penalties under Mexican law if they violated those rules. Later, Ford and Firestone listed the Mexican attorneys, including Pereznieto, as witnesses for the upcoming evidentiary hearing, but once again they did not follow up with subpoenas or other compulsory process. Indeed, they never served Pereznieto directly with a notice of the hearing, which had been scheduled for July 19, 2006.
*589 One week before the hearing, defense counsel filed a motion requesting sanctions against both the U.S. lawyers and the Mexican lawyers, including Pereznieto. That motion was served on the U.S. lawyers, but not on Pereznieto. The court initially declined to address the motion, but it promised the U.S. lawyers that if the court changed its mind and decided to rule, they would be given an opportunity to respond before a decision was rendered. As matters unfolded, this did not happen. Instead, the court conducted its evidentia-ry hearing on the facts surrounding the Morelos litigation on September 5 and 6, 2006. Pereznieto was not present and was not represented by counsel at the hearing. The details of the evidence are not important here, as no one has appealed from the district court’s November 14 decision to reaffirm its dismissal of the action based on forum non conveniens.
After the case was again dismissed, Ford and Firestone made a formal request for a ruling on their sanctions motion on December 6, 2006. Three days before the end of the 15-day period normally allowed by S.D. Ind. Local Rule 7.1(a) for a response to such a motion, on December 18, 2006, the court issued its order imposing sanctions and ordering entry of a final judgment. We have already set forth the critical language from that order. The U.S. lawyers did not contest the order, but on January 12, 2007, Pereznieto appeared by counsel and filed a motion for relief from the sanctions; he supported his motion with an affidavit and offered to make himself available for testimony pursuant to the terms of the Hague Convention on the Taking of Evidence Abroad in Civil or Commercial Matters (“Hague Evidence Convention”), Oct. 7, 1972, 23 U.S.T. 2555, 847 U.N.T.S. 231, reproduced at 28 U.S.C. § 1781 note. On January 16, 2007, Perez-nieto (through newly-retained counsel) filed a timely notice of appeal. The district court later dismissed his motion for relief as moot, in light of the fact that it no longer had jurisdiction over the matter.
The defendants do not seriously dispute the fact that they never attempted to compel Pereznieto to appear before the district court. Instead, they stress the closeness of his relationship with the plaintiffs’ U.S. attorneys — in effect, they say, he was a “joint venturer” with counsel for Mañez. As such, they argue, any notices that reached U.S. counsel also reached Perez-nieto by operation of law, and U.S. counsel were de facto representatives of Pereznie-to’s interests before the district court. Through Mañez’s U.S. counsel, Pereznieto received a copy of the notice of deposition and initially indicated that he would be willing to be deposed in Mexico. His later change of heart, defendants urge, permitted the district court to draw negative inferences, find facts against him, and impose the sanctions that it chose.
In analyzing the district court’s sanctions against Pereznieto, we must draw a distinction between the $100,000 fine for which he is personally liable and the order barring his testimony (new or already submitted) before any courts in the United States. We look first to the fine, and then to the testimonial bar.
1
As an initial matter, it is unclear how we should characterize the $100,000 fine. The court did not specify the exact nature of the order, although that in itself is unimportant, as it is the substance that matters. The order could have been several different things: (1) an adjudication of criminal contempt of court; (2) an adjudication of civil contempt; (3) a penalty under Fed. R. Crv. P. 11 or 37 for submitting a misleading or evasive document; or (4) a penalty for acts that imposed needless costs on the
*590
court, imposed under the court’s inherent authority. No matter which of these it was, however, the conclusion is inescapable that Pereznieto did not have adequate notice or a proper opportunity to respond. See generally
Autotech Tech. LP v. Integral Research & Dev. Corp.,
We start with the first two possibilities, criminal or civil contempt. The Supreme Court reviewed the difference between these two types of proceedings in
Mine Workers v. Bagwell,
Even for a direct contempt, the Court held, if the trial court “delays punishing a direct contempt until the completion of trial, ... due process requires that the contemnor’s rights to notice and a hearing be respected.”
Id.
at 832,
A finding of civil contempt also requires adequate procedures. One court described the process as follows:
To establish civil contempt, each of the following elements must be shown by clear and convincing evidence:
(1) the existence of a valid decree of which the alleged contemnor had actual or constructive knowledge; (2) ... that the decree was in the movant’s *591 “favor”; (3) ... that the alleged con-temnor by its conduct violated the terms of the decree, and had knowledge (at least constructive knowledge) of such violations; and (4) ... that [the] movant suffered harm as a result.
Ashcraft v. Conoco, Inc.,
To hold [a person] in civil contempt, the district court “must be able to point to a decree from the court which sets forth in specific detail an unequivocal command which the party in contempt violated.”
Grove Fresh Distribs., Inc. v. John Labatt, Ltd.,
We need not pursue the topic of contempt further, because we are convinced that it is a poor match for what the district court did in this case. Because Pereznie-to’s actions were not taken in the presence of the court, anything he did would have to be viewed as an indirect contempt. No one argues that the court invoked the procedures spelled out in Fed.R.CrimP. 42(a) for a prosecution for criminal contempt, and there is no hint in this record that Pereznieto received notice that this was what he was facing. If the $100,000 fine was intended instead to reflect a finding of civil contempt, the procedural problems are just as serious. The most glaring deficiency is the lack of any particular court decree or order that Pereznieto allegedly violated. Without any certainty about that, it is also impossible to know whether Pereznieto had actual or even constructive knowledge of the decree or that the decree somehow favored the defendants.
Another possibility is that the court’s order rested on either Rule 11 or Rule 37 of the Federal Rules of Civil Procedure. It is easy, however, to eliminate Rule 11, because it applies only to attorneys or unrepresented parties, see Rule 11(a) & (c), and Pereznieto is neither. He participated in the U.S. proceeding as an expert witness, and so it is possible that his affidavit and other (unspecified) filings might be considered as reports for purposes of Rule 26(b)(4)(A). That rule does not specifically address misleading or fraudulent expert reports, but Rule 37 addresses the topic of discovery sanctions in general. Rule 37(a)(1) allows a party to move for a court order compelling discovery, and Rule 37(b) provides for sanctions against either parties or nonparties who disregard a court order. To outline this possibility is to show, once again, that it does not fit here. The court never issued an order to Pereznieto either requiring him to file the affidavit in this court or requiring him to explain himself. It tried instead to arrange for a voluntary deposition in Mexico City, and when that fell through, it took no additional steps either to compel his appearance or to compel his compliance with any other court order. Thus, we must reject both Rule 11 and Rule 37 as possible sources of authority.
Last is the possibility of a penalty imposed under the court’s inherent authority to punish Pereznieto for an act that inflicted needless costs on the court and the defendants. As we have already noted, courts retain inherent power to punish the full range of litigation abuses.
Chambers,
a fine for contempt of court ... entails a violation of a judicial order, rather than a waste of time by taking frivolous steps, the domain of Rule 38. Ability to impose sanctions for acts that impose needless costs on other litigants is a longstanding power of federal courts.
In short, while we have no doubt that the court possessed inherent authority to address the kind of abuse with which Pereznieto is charged, that does not mean that it could dispense with such fundamental incidents of due process as adequate notice and an opportunity to be heard.
Cf. In re Teknek, LLC,
But when notice is a person’s due, process which is a mere gesture is not due process. The means employed must be such as one desirous of actually informing the absentee might reasonably adopt to accomplish it. The reasonableness and hence the constitutional validity of any chosen method may be defended on the ground that it is in itself reasonably certain to inform those affected, or, where conditions do not reasonably permit such notice, that the form chosen is not substantially less likely to bring home notice than other of the feasible and customary substitutes.
Id.
at 315,
Defendants take the position that their motion for sanctions sufficed both to give Pereznieto notice of that possibility and to afford him the opportunity to be heard. It is neither their fault nor the court’s, they continue, if Pereznieto let this chance slip away. Their motion identified him by name, sought sanctions against him personally, and detailed the events in Morelos in which he was directly involved. What defendants downplay, however, is the fact that they never served that motion on him directly. Nothing in the court record indicates that counsel for plaintiffs were also representing Pereznieto in his individual capacity, and so we cannot accept that service as a substitute. Nor is there anything that indicates an effort to serve Per-eznieto directly in Mexico. Both the United States and Mexico are parties to the Hague Convention on the Service Abroad of Judicial and Extrajudicial Documents in Civil or Commercial Matters (“Hague Service Convention”), opened for signature Nov. 15, 1965, 20 U.S.T. 361, 658 U.N.T.S. *593 163, reproduced at 28 U.S.C.App., Fed. R.CrvP. 4 note, as well as the Hague Evidence Convention. In the documents he filed seeking reconsideration of the district court’s order, Pereznieto specifically said that he would make himself available in Mexico City for a deposition pursuant to the Evidence Convention. Beyond that, Fed.R.Civ.P. 4(f) offers a number of options for service on an individual in a foreign country.
We conclude, therefore, that the part of the district court’s order that imposed a personal fine of $100,000 on Pereznieto must be set aside for failure of proper service. The court is free if it wishes to conduct further proceedings on this matter on remand, if it concludes they are warranted.
2
The part of the district court’s order that bars Pereznieto from providing any testimony in the Ford/Firestone cases before any court in the United States and that strikes all assertions that are already in the record is also problematic, although parts of it stand on stronger ground. District courts have broad discretion over the admission of evidence into the record, whether at the pretrial stage or during a trial. The findings that the court made about the contrived nature of the Morelos proceedings and the attempted fraud on the court amply support the court’s decision to exclude these materials for purposes of the multi-district proceeding before it. Insofar as it purported to address other lawsuits, before other courts, however, the court’s order was impermissibly overbroad. As applied to the Ford/Firestone cases, however, the order can be implemented easily. Pereznieto has a lesser stake in the possibility of acting as an expert for these consolidated cases, as compared with his interest in not being subject to a large monetary fine. Courts regularly reject expert testimony using the framework introduced by
Daubert v. Merrell Dow Pharmaceuticals, Inc.,
That said, we think it best to vacate this part of the order as well. The testimonial bar is linked directly to the payment of the monetary sanction of $100,000 that must be set aside for lack of proper notice and opportunity to be heard. It is unclear what sanction or sanctions the district court may decide are appropriate, if and when it has the benefit of a full adversary proceeding that includes Pereznieto. We note, in this connection, that Pereznieto has argued that the district court erred in its consideration of Mexican law and that it should have considered a wider range of materials. Should the district court decide to pursue this proceeding on remand, Pereznieto will be free to renew these arguments at an appropriate time.
Ill
In summary, we conclude that the district court had subject-matter jurisdiction to decide whether there had been an abuse of process and that Pereznieto’s contacts with the Indiana proceeding were sufficient to support personal jurisdiction over him. We further conclude that although the district court possesses inherent authority to address the kind of abuse with which Pereznieto is charged, Pereznieto did not receive constitutionally adequate *594 notice and an opportunity to be heard in the proceeding that led to the $100,000 fine and other sanctions against him. We therefore VACATE the order and REMAND to the district court for reconsideration in light of this opinion. Each party shall bear its own costs on appeal.
Notes
. The discussion in the text follows the well-established rule that the district court’s jurisdiction over the parties in a diversity case is linked to the state’s long-arm statute. Because we find that jurisdiction was proper under Indiana law, we save for another day the question whether the district court might also have relied on federal law in the proceedings against Pereznieto, on the theory that his actions were an affront to the federal court’s own processes.
