Hague Convention Article 5 and Article 17 letters of request are the two routes for gathering evidence abroad under the Hague Evidence Convention, and they work very differently. An Article 5 Letter of Request goes through the foreign country’s judicial authority, which collects the evidence and can compel a reluctant witness, with a judicial officer from the requesting country permitted to attend. Article 17 skips the foreign court entirely: a privately appointed commissioner takes the evidence directly, but only from a witness who agrees to participate. If you need compulsion, you need Article 5. If your witness is willing and you want speed and flexibility, Article 17 is usually the better tool.
How Article 5 Works
Article 5 covers a specific scenario. A judicial officer from the requesting country wants to be physically present while a foreign authority executes a Letter of Request. If you are litigating in the United States and need testimony or documents from a witness in Germany, a U.S. judge or designated representative can attend the German proceeding where the evidence is collected. The foreign judge stays in control of the session, but the American officer’s presence helps ensure the right questions get asked and that what is gathered actually fits the case.
To invoke Article 5, the Letter of Request itself must explicitly state that judicial attendance is desired and identify the officers by name and title. Foreign authorities need advance notice to arrange logistics, so vague or last-minute requests rarely succeed. Once the foreign state agrees, it notifies the requesting authority of the time and place so the visiting officer can coordinate travel.
The visiting officer’s role during the proceeding is limited. Some countries allow the officer to suggest additional lines of questioning through the presiding foreign judge. Others impose stricter boundaries on participation. In every case, the foreign authority keeps control of the proceeding. The value of attendance is practical: it provides a check against incomplete or misdirected evidence gathering, which matters most in complex commercial disputes where the relevance of a document may not be obvious to a foreign judge unfamiliar with the underlying case.
How Article 17 Works
Article 17 offers a fundamentally different approach. Instead of routing everything through a foreign court, a privately appointed commissioner takes evidence directly in the foreign territory. A commissioner is typically an attorney or other legal professional authorized by the requesting court for this specific task. The commissioner holds no diplomatic or government status, which makes the process more flexible but also more limited.
The critical limitation is that a commissioner cannot compel anyone. Article 17 states that evidence is taken “without compulsion.” A witness must be informed that they are not required to appear or give evidence. If the witness refuses, the commissioner has no recourse short of abandoning the effort and pivoting to a formal Letter of Request that invokes the foreign court’s authority. Article 17 works best when the witness is willing to participate — a company employee, for instance, or a friendly third party.
Before the commissioner can begin, they must obtain permission from the competent authority in the country where the evidence sits. Some countries grant blanket permission for commissioner-led collection; others require case-by-case authorization. The application must detail the scope of the evidence sought and the commissioner’s identity and qualifications. This step protects the host nation’s sovereignty and ensures the commissioner’s activities comply with local law.
Choosing Between Article 5 and Article 17
The choice usually comes down to three questions. Will the witness cooperate? If not, Article 17 is off the table because the commissioner has no compulsion power. Do you need a foreign judge’s authority behind the process? Article 5 gives you that; Article 17 does not. Does the foreign country permit commissioner-led evidence collection, and on what terms? Some grant it freely; others require detailed authorization that may take as long as processing a full Letter of Request.
Whichever route you choose, engaging local counsel in the foreign jurisdiction early is one of the most important practical decisions available. Local attorneys understand blocking statutes that may restrict cooperation with foreign discovery orders, data privacy laws that limit cross-border document sharing, and privilege rules that may differ from American standards. Local counsel can also help frame requests narrowly enough to satisfy foreign authorities, who are far more likely to grant permission for a focused request than a broad one.
The Convention Is Optional
One threshold point trips up many practitioners: the Hague Evidence Convention does not create the exclusive method for obtaining evidence abroad. The U.S. Supreme Court settled this in Societe Nationale Industrielle Aerospatiale v. U.S. District Court, holding that the Convention establishes “optional procedures for obtaining evidence abroad” rather than mandatory ones. A U.S. court retains jurisdiction to order a foreign party to produce evidence under the Federal Rules of Civil Procedure, even when that evidence sits in a signatory nation.
That does not mean the Convention is irrelevant. Many foreign countries view their sovereignty interests differently, and some have enacted blocking statutes that penalize compliance with foreign discovery orders. Using the Convention is often the most practical path when the evidence is controlled by a non-party witness abroad or when the foreign country is likely to resist informal requests. The Convention also applies only to civil and commercial matters.
Drafting a Request That Won’t Be Returned
A Letter of Request that arrives with missing or vague information will be returned without action, and the months spent preparing and transmitting it will be wasted. Article 3 sets the baseline, and foreign Central Authorities enforce it strictly. Every request must include:
- Full legal names and physical addresses of all parties, plus their legal representatives.
- A description of the underlying proceedings — for example, breach of contract or product liability — with enough detail that the foreign authority understands why the evidence matters.
- A specific description of the testimony or documents requested. For oral testimony, include the questions to be asked or the subject matter to be covered. For documents, identify them as precisely as possible.
- For Article 5 requests, the names and titles of the judicial officers who will attend.
- For Article 17 requests, the proposed commissioner’s identity, qualifications, and the scope of their authority.
Model forms are available through the Hague Conference on Private International Law, and using them is strongly recommended. The numbered fields walk you through each required element and reduce the chance of omitting something critical.
Translation
All documents submitted with a Letter of Request must be translated into the official language of the receiving country. The U.S. Department of State advises that the translator execute an affidavit attesting to the validity of the translation before a notary. Sloppy or uncertified translations are a common reason for delays. Budget for professional legal translation from the outset.
Specificity and the Article 23 Problem
Article 23 allows any signatory to declare that it will not execute Letters of Request “issued for the purpose of obtaining pre-trial discovery of documents as known in Common Law countries.” A large number of civil law countries have filed this reservation, and it creates a persistent problem for American litigants because U.S.-style discovery is exactly the kind of broad, pre-trial document production Article 23 targets.
The scope of the reservation varies. Some countries apply it broadly to reject anything resembling American discovery. Others refuse only requests that lack specificity. The most effective response is to draft narrowly. Identify individual documents or narrow categories rather than requesting “all documents relating to” a broad topic. Requests that read like American interrogatories are the ones most likely to be rejected.
Witness Privileges Under Article 11
Article 11 establishes a dual-track privilege system that protects witnesses during evidence collection under either Article 5 or Article 17. A witness may refuse to give testimony if they hold a privilege or duty to refuse under the law of either country involved: the country where the evidence is being taken, or the country where the litigation is pending.
For the requesting country’s privileges to apply, they must be specified in the Letter of Request itself, or the requesting authority must confirm them when asked. If a witness invokes a privilege from the requesting state’s law but the Letter of Request says nothing about it, the foreign authority has no obligation to honor it. Drafting with privilege issues in mind is essential; omitting applicable privileges can leave a cooperating witness exposed or create disputes that delay execution for months. A country may also declare that it will respect privileges from third countries beyond the two directly involved.
Grounds for Refusal
Foreign authorities can refuse to execute a Letter of Request, but Article 12 limits refusal to two situations: where executing the request falls outside the functions of the judiciary in the requested country, and where the requested country considers that its sovereignty or security would be prejudiced. A country cannot refuse simply because it claims exclusive jurisdiction over the subject matter, or because its own law would not recognize the underlying cause of action. Article 23, discussed above, is the more common obstacle in practice.
Where to Send the Request
Every country that has ratified the Convention designates a Central Authority to receive and process incoming Letters of Request. In the United States, the Department of Justice handles this function. The requesting party must transmit the completed forms and supporting exhibits to the Central Authority of the foreign country where the evidence is located, not to the U.S. Central Authority, which handles incoming requests from abroad.
Transmission methods depend on the receiving country. Some accept direct mail; others require diplomatic channels. Administrative fees apply in most countries and vary by jurisdiction. The request must include the correct number of copies specified by the receiving country. Sending incomplete packages or omitting payment results in the documents being returned without any action taken.
Processing timelines vary. Some countries execute straightforward requests within a few months; others take considerably longer, particularly when the request involves complex document production or when the receiving authority raises questions about scope. Once execution is complete, you receive either the collected evidence along with a certificate of execution, or a statement explaining why the request could not be fulfilled, citing the specific legal or practical grounds for the refusal.