Seeking or Opposing Section 1782 Discovery: A Practical Guide

Document type: Guide Practice area: Litigation — Cross-Border Litigation Jurisdiction: United States Last reviewed: 5 September 2026

PART ONE — SEEKING DISCOVERY

Step one: confirm there is a qualifying foreign tribunal

Before anything else, answer this, because ZF Automotive made it dispositive.

Qualifies: a foreign court; a foreign administrative or regulatory body exercising adjudicative functions; an intergovernmental body created by two or more nations and imbued with governmental authority; a foreign insolvency proceeding; a foreign criminal proceeding conducted by an investigating magistrate.

Does not qualify: private commercial arbitration, whether institutional or ad hoc.

Contested: investor-state tribunals. The analysis turns on whether the nations intended the panel to exercise governmental authority, which depends on the treaty regime, the permanence of the institutional machinery, governmental involvement in appointments, and how proceedings are supervised.

If the client's dispute is a private arbitration, ask whether a qualifying proceeding exists alongside it: a parallel court action, an annulment or set-aside application, an enforcement proceeding, a regulatory investigation, or an insolvency. If so, the application must be built honestly around that proceeding — including a use restriction if one is required.

If the proceeding is not yet filed, the "reasonable contemplation" standard applies. Prepare the supporting record: a draft pleading, a formal demand, a foreign counsel opinion on the claim's viability, a limitation deadline. Speculation is not enough.

Step two: select the target

This decision determines the outcome more often than any brief.

The first Intel factor is the most heavily weighted. A target who is a participant in the foreign proceeding — or who is closely affiliated with one — invites the argument that the foreign tribunal can order the material itself. A genuine non-participant is a far stronger target.

Ranked, best to worst:

An unaffiliated third party with the material: a bank, an auditor, a consultant, a counterparty, a former employee.
A former officer or employee of the foreign adversary now in the United States.
A US entity in the same corporate group as the adversary but not a party abroad — workable, but expect the affiliation argument.
A US party to the foreign proceeding — the weakest, and often denied.

Then confirm "resides or is found." For an individual, domicile or presence. For an entity, incorporation, principal place of business, or contacts rendering it essentially at home. A subsidiary's presence does not make the parent found absent agency or alter ego, and mere registration to do business is generally insufficient.

Consider several targets. Different districts, different targets, different scopes. But be aware that a pattern of applications can look like forum shopping.

Step three: choose the venue

Districts differ materially. Before filing, establish:

Whether ex parte applications are routinely granted.
Whether local rules require notice.
The district's approach to documents held abroad.
How intensively the Intel factors are applied.
Typical time from filing to order.
Whether there is developed case law — which cuts both ways.

Where more than one district is available, weigh predictability against speed and against the strength of the "found" showing. A marginal presence argument in a favourable district is worse than a clear one in a neutral district.

Step four: build the foreign record

This is the part applicants skimp on and courts notice.

The foreign counsel declaration should establish:

The nature of the foreign tribunal and its adjudicative character.
The proceeding: parties, claims, procedural posture, timetable. Attach the pleadings and the docket.
The client's status and procedural rights — establishing "interested person."
How the evidence would be submitted to the foreign tribunal. This is the "for use" element and it is frequently addressed in a sentence when it deserves a paragraph.
Receptivity: that the foreign tribunal accepts evidence obtained abroad, and that no rule would exclude it. Address this affirmatively, before the respondent raises it.
Whether any request for the material has been made in the foreign forum, and what happened. If there has been a refusal, disclose it — the respondent will find it, and concealment is worse than the fact.
Any case management order or evidentiary cut-off bearing on the request.

Have foreign counsel confirm in writing that the material, if produced, can and will be put before the foreign tribunal. If they cannot, reconsider the application.

Step five: draft the request narrowly

Courts deny broad applications more often than they narrow them. Narrow before filing.

Custodians: name them. Three to six, not twenty.
Date range: tied to the events pleaded abroad, not to the corporate relationship.
Topics: defined by reference to the issues in the foreign proceeding, and traceable to the foreign pleadings.
Depositions: a small number of hours on enumerated topics, not an open-ended Rule 30(b)(6) notice.
Documents held abroad: consider excluding them in the first instance. They generate blocking statute and data protection objections that consume the proceeding.
A protective order, offered in the application, restricting use to the foreign proceeding and controlling onward disclosure.

A useful calibration. Ask what a reasonable foreign judge would order if the foreign system permitted this kind of discovery. Request that, and no more.

Step six: file

The papers:

Application or petition, with the proposed order.
Memorandum: the three statutory requirements, then the four Intel factors, each addressed affirmatively.
Declaration of US counsel: the parties, the foreign proceeding, the target, the basis for "found," and the scope.
Declaration of foreign counsel (Step four).
Proposed subpoenas.
Proposed protective order.
Exhibits: foreign pleadings, docket, relevant orders, certified translations.

Ex parte is standard. The order grants leave to serve; it is not a merits determination.

Consider giving notice anyway where the target is likely to cooperate, or where a courtesy will produce negotiated scope rather than a motion. In some districts and with some targets, this is the faster route.

Step seven: manage the production

Expect the foreign adversary to intervene. The target may have no stake; the adversary does.

Negotiate scope before litigating it. Most § 1782 disputes settle into an agreed narrower production, and courts prefer that. Approach the target early with a proposal.

Address privilege carefully. Section 1782 preserves legally applicable privileges, including foreign ones. Where a foreign jurisdiction does not recognize in-house counsel privilege, or recognizes a narrower version, the choice-of-law question is genuinely difficult and should be addressed in the protective order rather than fought document by document.

Confidentiality. Agree a protocol: designations, challenge procedure, use limited to the foreign proceeding, return or destruction at the end, and a mechanism for filing under seal in the foreign forum if that is possible there.

Costs. Rule 45 protections apply, and the target may seek cost shifting. Offering to bear reasonable production costs at the outset removes an objection cheaply.

PART TWO — OPPOSING

Step eight: decide how to respond

Three options:

Comply. Where the request is narrow, the material unremarkable, and the client has no stake in the foreign dispute. Negotiate confidentiality and cost, and move on.

Negotiate. The most common good outcome. Propose a narrower scope, a protective order, and a timetable. Most applicants accept, because they want the documents rather than the fight.

Move to quash. Where the material is genuinely sensitive, the request is overbroad, or a strong Intel argument exists.

The decision should follow an investigation of the foreign proceeding, not an assessment of the US papers. The strongest defences come from the foreign file.

Step nine: investigate the foreign proceeding

Instruct foreign counsel immediately, with three questions:

1. Has this material been sought in the foreign forum, and what happened? A prior refusal is the single most powerful fact available to a respondent, and it goes to the third Intel factor at its strongest.

2. Would the foreign tribunal receive this evidence? And — the harder question — can it be asked to say so? Some foreign courts will entertain an application for such a statement. That is authoritative proof of non-receptivity in a way that an expert declaration is not.

3. Is there a case management order, evidentiary cut-off, or procedural rule the application evades?

Also establish: the client's status abroad; whether the applicant's characterization of the proceeding is accurate; and whether the proceeding is as advanced, or as real, as the application claims.

Step ten: build the motion to quash

Organize it around the statute and the factors, in this order:

1. Statutory failures, if any: the target is not found in the district; there is no qualifying foreign tribunal; the proceeding is not within reasonable contemplation; the applicant is not an interested person; the material is not "for use."

2. Intel factor one — participation. The target is a participant, or is affiliated with one, and the foreign tribunal can order the material itself.

3. Intel factor two — receptivity. With the best evidence available: a statement from the tribunal, a foreign judicial decision, a governmental position. An expert declaration about what the foreign court would order is not the point and courts say so.

4. Intel factor three — circumvention. Prior refusal abroad; evasion of a case management order; a blocking statute or data protection prohibition; use for a purpose other than the foreign proceeding.

5. Intel factor four — burden. Quantified, with a declaration from someone who has actually costed it: custodians, volume, retrieval difficulty for legacy systems, review cost, third-party privacy.

6. Privilege, identified by category rather than document by document at this stage.

7. The lesser alternative. Always offer one: a narrower scope the client could live with. Courts are more willing to narrow than to quash, and a respondent who proposes the narrowing shapes it.

Step eleven: intervention

If the client is the foreign adversary rather than the subpoena target, move to intervene. Courts generally permit it where the client's interests are directly affected — the evidence would be used against it abroad.

Do it early. The target may negotiate a production before the adversary appears, and unwinding that is difficult.

Coordinate with the target. The target usually wants the dispute to end cheaply and will accept scope the adversary would fight. Offer to bear the cost of the opposition, and consider a joint defence arrangement.

Step twelve: appeal

An order granting or denying a § 1782 application is generally appealable as a final order, because the § 1782 proceeding is the entire case. This is a meaningful difference from ordinary discovery orders.

For a denied applicant, that is a genuine route, and the standard is abuse of discretion — so the appeal is framed as legal error: the court applied a foreign discoverability requirement Intel rejected; it treated a factor as dispositive; it applied the wrong standard to "found" or to "foreign tribunal."

For a respondent facing an order to produce, consider whether a stay is available and whether production would moot the appeal. Seek a stay in the district court first.

PART THREE — THE OTHER MOVE

Step thirteen: the defensive application

A respondent in a foreign proceeding is itself an interested person and may make its own § 1782 application.

Why this is underused. A foreign claimant exploiting the asymmetry of American discovery frequently has US connections of its own — affiliates, banks, advisers, former employees. A reciprocal application neutralizes the advantage and, often, produces a negotiated standstill in which both sides withdraw.

When it works: where the claimant or its affiliates are found in a US district; where the claimant's own documents would be helpful; where the claimant has US-based advisers.

How to use it: file it on its merits, not as retaliation. An application that is transparently tit-for-tat invites the third Intel factor argument. An application that identifies specific material relevant to specific defences is a real application that happens to change the dynamic.

The negotiated outcome. In a meaningful proportion of cases where both sides have exposure, the result is a mutual withdrawal or a reciprocal, narrowed exchange. That is frequently the best outcome for both, and it is available only to the party that thought of it.

Blocking statutes and data protection in practice

Where the material is held abroad, or concerns individuals abroad, a second body of law engages and it needs to be handled as a workstream rather than as an objection.

For an applicant, defuse it by design. Target US-held documents. Limit the request to business rather than personal information. Name custodians rather than requesting everything about a subject. Offer a protective order at the outset. Offer to accept redaction of personal data unnecessary to the issues. Every one of these is cheap and removes an argument.

For a respondent, make the objection real rather than formal. Courts have historically discounted blocking statute arguments where the statute appeared designed to frustrate US discovery and was never enforced. The credible modern showing has four parts:

The prohibition applies to this disclosure — with the text and a considered opinion, not a general assertion.
It is enforced — with evidence of actual enforcement activity.
The client faces real exposure — penalties, and who bears them.
An alternative channel exists — a Hague request, or a mechanism in the foreign proceeding — through which the applicant could obtain the material lawfully.

Data protection specifically. The analysis is: is there a lawful basis for the processing and the transfer; is the transfer necessary and proportionate; and what mechanism applies. The practical mitigations are minimization, pseudonymization, review in the source jurisdiction with only responsive redacted material transferred, and a protective order restricting onward disclosure. A respondent that proposes these looks cooperative; one that simply refuses looks obstructive.

The comity analysis. Where the conflict is genuine, courts weigh the importance of the material, the specificity of the request, whether the information originated in the United States, the availability of alternative means, and the extent to which non-compliance would undermine either state's interests. Both sides should brief those factors expressly rather than arguing past each other.

Timelines and expectations

Clients on both sides ask how long this takes. Rough figures for planning:

Applicant side. Two to four weeks to prepare the application properly, including the foreign counsel declaration — longer if the foreign proceeding must be documented and translated. One to eight weeks from filing to an ex parte order, depending on the district. Then service, and fourteen days or more for a motion to quash. If unopposed, production typically begins four to twelve weeks after service. If opposed, add three to six months for the motion, and more if there is an appeal.

Respondent side. Fourteen days from service is the usual window to move to quash, and extensions are commonly agreed. Investigating the foreign proceeding — obtaining the docket, translating orders, instructing foreign counsel — takes two to four weeks and must run concurrently.

The practical implication for applicants. If the foreign proceeding has a hearing in three months, an opposed § 1782 application will not produce evidence in time. That is a reason to file early, to file narrowly so that it is not opposed, or to reconsider.

For respondents, the mirror: delay has value, and an applicant facing a foreign deadline may accept a much narrower production rather than litigate. That is a legitimate negotiating position, and it is usually the best available outcome for a target with genuinely sensitive material.

Costs

Applicant. Preparing and filing a straightforward application: modest, and small relative to the value of the material. An opposed application with foreign law declarations, a contested motion to quash, and possibly an appeal: a real piece of litigation costing many multiples of the filing.

Respondent. A negotiated narrow production is usually the cheapest outcome by a wide margin. A contested motion costs more than most targets expect, which is why targets with no stake in the foreign dispute generally negotiate — and why the foreign adversary, which does have a stake, should expect to fund the opposition if it wants one.

Cost shifting. Rule 45 protects a non-party from significant expense, and courts have required applicants to bear reasonable production costs. Raise it early; it is easier to agree than to litigate.

The proportionality point. The economics favour narrow applications and negotiated productions on both sides. Cases that go to a contested motion usually do so because the material is genuinely important to someone — which is worth knowing, because it tells you what the fight is actually about.

Worked example one: the enforcement application

Léa Marchetti acts for a judgment creditor holding a €40 million judgment from a French court against a defendant who claims to have no assets. Enforcement proceedings are pending in France and in two other jurisdictions.

The qualifying tribunal. Enforcement proceedings are foreign proceedings, and the French enforcement action is unquestionably before a foreign tribunal.

Target selection. Not the defendant, who is a participant. Instead: three US correspondent banks through which payments to and from the defendant's known entities were routed. All are genuine non-participants with no stake in the dispute.

Venue. All three banks are found in the same district, which also has developed case law favourable to asset-tracing applications. She files one application covering all three.

Scope. Transaction records for four named entities over a thirty-month period, plus account opening documents and beneficial ownership records. Not "all documents relating to the defendant." She offers a protective order restricting use to the enforcement proceedings, naming them.

The foreign declaration establishes that French enforcement law permits the court to consider evidence of asset transfers, that her client has standing to submit it, and that no French rule would exclude it.

Outcome. Two banks produce without opposition on an agreed scope, with Léa's client bearing production costs. The third negotiates a narrower period. Production reveals transfers to two entities not previously known, which becomes the subject of a second application in another district.

The lesson. Asset tracing is where § 1782 is at its most effective, because the targets are non-parties with no interest in fighting, the request is naturally specific, and the foreign proceeding's receptivity is easy to establish.

Worked example two: the pre-suit application

Anton Belov's client is contemplating a claim in the English Commercial Court against a former joint venture partner but does not yet have the evidence to plead fraud with the particularity English pleading requires.

The "reasonable contemplation" problem. No proceeding is pending. He must show more than a speculative intention.

What he assembles: a draft particulars of claim, settled by English counsel; a letter before action already sent under the pre-action protocol; an opinion from English counsel that the claim is viable subject to evidence of the transfers; and a limitation date fourteen months away.

Target. A US accounting firm that provided services to the joint venture and holds the working papers. A non-participant, and the material is specific and identifiable.

Scope. The working papers for two financial years, plus communications with three named individuals over the same period.

The opposition argues that the application is a fishing expedition to determine whether to sue. Anton's response is that the pre-action protocol correspondence, the draft pleading, and counsel's opinion establish contemplation, and that the request is directed to specific documents relevant to specific pleaded allegations rather than to a search for a claim.

Outcome. Granted, with the period narrowed to one financial year. The material supports the claim, which is filed six months later.

The lesson. Pre-suit applications are available but require a documented record. "We are thinking about suing" fails; a draft pleading and a protocol letter succeed.

Worked example three: the negotiated resolution

Priya Menon's client, a US technology company, is served with a § 1782 subpoena seeking documents relating to a former employee now involved in litigation in Singapore. The client has no stake in the dispute.

Her assessment, in the first week: the request is broad but the underlying material is unremarkable — HR records, some project documents, and email for one custodian. The cost of a contested motion would exceed the cost of production several times over.

What she does not do: file a motion to quash on principle.

What she does: telephone the applicant's counsel. She proposes: one custodian rather than four; an eighteen-month period rather than five years; production of HR records in a defined category rather than the whole file; a protective order limiting use to the Singapore proceeding and prohibiting onward disclosure; the applicant bearing collection and review costs; and a four-week timetable.

The applicant accepts almost all of it, because the applicant wants the documents and not a fight, and because the narrowed set contains the material that actually matters.

Total elapsed: seven weeks. Total cost to the client: a fraction of a contested motion, reimbursed.

The lesson. Most § 1782 matters should end this way, and they do not because the reflex on receipt of a subpoena is to litigate. A target with no stake in the foreign dispute has one objective — to spend as little as possible and to protect anything genuinely sensitive — and negotiation achieves both better than a motion.

The Hague route, and when to use it instead

Section 1782 is not the only mechanism, and there are cases where the Convention route or letters rogatory is the right answer.

Use § 1782 when: the target is found in a US district; speed matters; the request is for documents or testimony that only US-style discovery would produce; and the foreign forum will receive the evidence.

Use the Convention or letters rogatory when: the target is abroad and not subject to US jurisdiction; the foreign court has indicated it prefers the formal channel; the evidence must be taken in a form the foreign court requires; or a blocking statute makes the direct route genuinely unlawful.

What the Convention route costs you: time, measured in months to years; control, because the foreign authority executes the request as it sees fit; and scope, because many states have entered reservations against pre-trial document requests and most will not permit an American-style deposition.

What it gives you: unimpeachable legitimacy in the foreign forum, and immunity from the circumvention argument.

A hybrid approach is often best in a complex matter: § 1782 for the US-found targets and the material that matters most, the Convention for evidence that must be taken abroad, and — where the foreign court is willing — a letter of request from that court supporting the § 1782 application, which is close to unanswerable.

One caution. Where the foreign court has directed that evidence be sought through the Convention, a parallel § 1782 application looks like exactly what the third Intel factor is aimed at. Check the foreign directions before filing.

Practice management

A short set of habits that make these matters go better.

Open the foreign file immediately. Docket, orders, pleadings, translations. Everything important in a § 1782 case is in the foreign record, and obtaining it takes longer than anyone plans for.

Instruct foreign counsel with specific questions, in writing, and ask for answers in writing. A general request for "background on the proceeding" produces a memorandum that answers none of the questions the Intel factors ask.

Budget for translation. Certified translations of pleadings and orders are required, take time, and cost more than expected.

Diary the foreign proceeding's key dates. A hearing date abroad determines whether an application is worth making and how hard a respondent should push on timing.

Keep the protective order draft ready. Offering one at the outset, rather than negotiating it after a fight, resolves a category of objection for free.

Record the scope decisions. In a matter that may be appealed, the record of what was requested, what was offered, and what was narrowed matters.

Tell the client what this is. Applicants should understand that an ex parte order is leave to serve, not a win, and that production may take months. Respondents should understand that a subpoena from a foreign litigant is often negotiable and that fighting on principle is usually the most expensive option available.

Privilege across borders

Privilege is the most technically difficult part of a § 1782 production and the part most often handled badly.

The statute preserves it. Section 1782 provides that a person may not be compelled to testify or produce in violation of any legally applicable privilege.

Which privilege law applies is not settled by the statute. Courts generally apply a touch-base analysis: communications touching base with the United States are governed by US privilege law; those touching base with a foreign country are governed by that country's law, subject to comity.

Where this bites hardest:

In-house counsel. Several jurisdictions do not extend legal professional privilege to communications with in-house lawyers, or extend it only where the lawyer is admitted locally and independent. A US company's ordinary internal legal advice may be privileged here and not there — and, in a § 1782 production for use in that jurisdiction, the foreign rule may govern.
Patent and regulatory agents, whose communications are privileged in some systems and not others.
Litigation privilege, whose scope and timing triggers vary considerably.
Without-prejudice and settlement communications, protected differently across systems.
Common interest, which is recognized narrowly or not at all in some jurisdictions.

Practical handling:

Address it in the protective order rather than document by document — an agreed privilege protocol, with a clawback provision, saves months.
Log by category where possible, with the court's permission, rather than entry by entry across thousands of documents.
Get a foreign law opinion early on the privilege rules of the forum where the material will be used, because that is the rule the adversary will invoke.
Consider the consequences of production abroad. Material produced under a US protective order and then filed in a foreign proceeding may lose protection there. A respondent should ask what happens to privileged-adjacent material once it enters the foreign record.
Do not assume waiver rules travel. Subject-matter waiver, and the protections against it, differ substantially.

A concluding orientation

The temptation in a § 1782 matter is to treat it as a discovery dispute that happens to have a foreign element. It is more usefully treated as a proceeding about a foreign proceeding, in which the US court is being asked to help and is deciding whether help is appropriate.

That framing tells an applicant to build the case out of the foreign record: here is the tribunal, here is what it is deciding, here is why it cannot reach this material, here is how the evidence will be used, and here is a request calibrated to that use. It tells a respondent to look for the answer in the same place: has the foreign tribunal already refused, would it decline the evidence, does the request evade its directions.

The US papers matter far less than either side expects. The applications that succeed are the ones where somebody obtained the foreign docket, read the foreign orders, asked foreign counsel the right questions, and narrowed the request to what the foreign case actually needs. The ones that fail are, almost always, the ones drafted from a US template by someone who never looked at what was happening abroad.

The parallel-application problem

In substantial cross-border disputes, § 1782 applications rarely come singly. An asset-tracing matter may generate applications against six banks in four districts; a large commercial dispute may see applications and cross-applications on both sides.

For the applicant running several:

Keep the papers consistent. Different descriptions of the same foreign proceeding in different districts will be found and used.
Disclose the other applications. Courts dislike discovering a parallel application from the opposition. A short paragraph identifying the others, and explaining why each targets different material, defuses the forum-shopping argument.
Sequence them. A grant in one district is useful context in the next; a denial is a problem you should know about before filing again.
Watch cumulative burden. Six narrow applications may look reasonable individually and oppressive together, and a respondent will say so.

For the respondent facing several:

Coordinate. Where the targets are related, or where the same foreign adversary is intervening in each, a single strategy and consistent papers are worth more than separately optimized filings.
Use the pattern. A pattern of applications across districts supports the argument that the applicant is conducting a fishing expedition rather than assisting a foreign tribunal.
Watch for inconsistency in the applicant's descriptions of the foreign proceeding across districts. It is a gift when it appears.

For both: there is no formal coordination mechanism. Courts have occasionally coordinated informally, and a party can raise the existence of parallel applications and ask a court to await another district's ruling. Whether that helps depends entirely on which way the first ruling is likely to go.

Drafting the subpoena

The subpoena is the operative document and it is frequently drafted as an afterthought, copied from a domestic case.

Definitions. Keep them short and specific. A definition of "Documents" running to a page, imported from a US commercial template, signals that nobody calibrated the request. Define the entities and the transactions by name.

Requests. Each one should be traceable to an issue in the foreign pleadings. A useful discipline is to annotate the internal draft with the paragraph of the foreign statement of claim each request supports; requests with no annotation should be cut.

Date range stated once, at the front, applying to all requests unless expressly varied.

Custodians named, with a mechanism for adding one if the production reveals another obvious source — an addition negotiated rather than imposed.

Format. Specify production format, metadata fields, and de-duplication, and offer to accept the target's ordinary format. A target that can produce from its existing systems will do so far more cheaply.

Deposition topics, where testimony is sought, enumerated and bounded by time. "All matters relating to the transaction" is not a topic.

Compliance date realistic. An unrealistic date produces a motion rather than documents.

Attach the protective order to the subpoena, or reference it, so the target sees the protection before it sees the burden.

Have foreign counsel read it. They will identify requests that seek material the foreign court cannot use, and requests that miss material it needs. Fifteen minutes of their time reliably improves the document.

What to tell the client at the outset

If you are the applicant:

"This is fast and cheap compared to any other way of getting evidence across borders, and it may produce material the foreign court would never order. But the ex parte order is only permission to serve — the real fight, if there is one, comes after. Expect eight to sixteen weeks if nobody opposes, and six months or more if someone does. The narrower we make the request, the more likely we are to get it without a fight. And if the foreign court has already refused this material, tell me now, because the other side will find out."

If you are the respondent:

"You have been subpoenaed in a dispute you are not part of. There are three options: comply, negotiate a narrower production, or fight. Fighting is usually the most expensive, and it makes sense only if the material is genuinely sensitive or the request is genuinely oppressive. Before we decide, I want to know what is happening in the foreign proceeding — in particular whether they already asked for this there. That answer often decides the case. Meanwhile, we should ask them to bear your costs, which they will usually agree to."

If you are the foreign adversary:

"Someone else has been subpoenaed, and the documents will be used against you. You can intervene, and you should, early — before the target agrees to produce. The target has no reason to fight this on your behalf, so if you want it fought, you will be funding it. And it is worth asking whether they have US connections of their own, because a reciprocal application often ends this by mutual agreement."

Each of these conversations takes five minutes and prevents the most common misunderstandings in this area.

A one-page decision tree

Is there a qualifying foreign tribunal? Court, regulator, intergovernmental body, insolvency, investigating magistrate → yes. Private commercial arbitration → no; look for a parallel court proceeding. Investor-state → depends on the treaty regime.

Is a proceeding pending or in reasonable contemplation? Pending → yes. Contemplated → build the record: draft pleading, demand letter, counsel's opinion, limitation date.

Is the target found in a US district? Individual: domicile or presence. Entity: incorporation, principal place of business, or essentially at home. Subsidiary presence alone → probably not.

Is the target a participant abroad, or affiliated with one? Non-participant → strong. Affiliated → expect a fight. Participant → usually denied.

Has the foreign tribunal refused this material? Yes → do not file. No → proceed, and say so.

Would the foreign tribunal receive it? Establish affirmatively through foreign counsel; look for anything from the tribunal itself.

Is the request calibrated to the foreign case? Named custodians, bounded period, topics traceable to the foreign pleadings, protective order offered → file. Otherwise → narrow it first.

Is the material held abroad? US-held → straightforward. Abroad → assess blocking statutes and data protection, and consider excluding it from the first request.

Eight questions. Answered honestly, they will tell you whether to file, against whom, and how narrowly — which is the whole of the strategy in this area.