Oregon Civil Discovery: No Interrogatories, No Routine Expert Reports. Litigate Accordingly.
Some of the most expensive mistakes in Oregon civil litigation are made in the first sixty days, and good lawyers make them by waiting. They wait for initial disclosures that the ordinary Oregon rules do not require. They wait for interrogatory answers that will identify the witnesses and expose the theory, and for the expert report that will finally explain what the other side's engineer thinks went wrong. By the time it becomes clear that Oregon state-court practice does not work that way, the scene is cleaned up, the phone is replaced, the project manager is working in Boise, and the case will be tried on whatever record survives.
The Oregon Court of Appeals has described Oregon's expert-discovery regime as what is colloquially called "trial by ambush." Hinchman v. UC Market, LLC, 348 P.3d 328, 333 (Or. Ct. App. 2015). This sounds dramatic, but the reality is that a party in an Oregon case can reach the eve of trial without knowing how the opposing expert intends to address causation, damages, professional standards, product defect, or the allocation of fault among several codefendants. Oregon generally does not require your opponent to lay out its retained-expert case before trial. You have to reconstruct it from documents, third parties, sworn testimony, and your own experts, and you need to start earlier than federal-court instincts would suggest.
What Oregon Discovery Provides, and What It Does Not
Federal Rule of Civil Procedure 26 generally requires parties to disclose certain witnesses, documents, damages computations, and insurance information without waiting for a discovery request. A retained testifying expert ordinarily must provide a written report setting out the opinions, their bases, the facts or data considered, qualifications, prior testimony, and compensation. The opposing party can then depose the expert.
Oregon follows a different system. ORCP 36 A provides for depositions, production and inspection of documents and property, physical and mental examinations, and requests for admission. Interrogatories are absent. ORCP 36 B still permits broad discovery of relevant, nonprivileged material. The available tools are fewer.
Expert discovery is the sharper departure. In Stevens v. Czerniak, 84 P.3d 140 (Or. 2004), the Oregon Supreme Court held that the ordinary discovery rules do not authorize compelled pretrial disclosure of a retained expert's identity or anticipated testimony. For retained litigation experts in ordinary civil cases, Oregon generally has no Rule 26-style report, no routine expert-disclosure deadline, and no discovery deposition absent agreement or some other independent basis. ORCP 44 separately requires certain physician and psychologist examination reports and reports concerning examinations related to injury claims. Documents, organizational testimony, third-party discovery, and your own experts therefore have to supply information that federal practice often provides more directly.
Read the Complaint as a Discovery Document
ORCP 18 A requires a complaint to state the ultimate facts constituting the claim. Read the pleading closely before serving broad discovery. Identify the conduct attributed to each defendant, the duty and breach alleged, the injury claimed, the causal chain connecting them, and every point at which the plaintiff will need specialized knowledge to prove an element. A complaint alleging that a commercial refrigeration unit failed because of an improperly specified compressor is telling you that engineering testimony will matter and that your engineer should see the unit before anyone disassembles it.
Where the pleading is genuinely opaque, ORCP 21 A(1)(h) permits dismissal for failure to state ultimate facts sufficient to constitute a claim, and ORCP 21 D allows the court to require a more definite and certain pleading when the allegations are so indefinite or uncertain that the precise nature of the claim is not apparent. Use those motions when they solve a real problem. Attacking a complaint because it could have been drafted more gracefully wastes money. Attacking one that leaves your client unable to identify which of four business units allegedly did anything wrong can save far more in discovery than the motion costs.
Retain Experts Early Enough to Shape Discovery
In most ordinary Oregon civil cases, waiting for an opposing expert report means waiting for a document the rules do not require. Retain your own expert early enough to help shape the investigation. Early expert work protects evidence that otherwise disappears. In one matter, early expert involvement preserved physical evidence that was at risk of being altered or discarded before the technical issues had been fully investigated. Where causation depends on physical conditions, retaining the right expert early can preserve evidence that later discovery cannot recreate.
The same work focuses discovery. An accountant can identify the financial records worth requesting before you depose the controller. A physician can isolate the factual assumptions that drive causation. A product engineer can tell you whether the answer is likely to sit in the design specifications, manufacturing records, testing protocol, or the unit itself. An expert consulted early will sometimes tell you that your theory does not survive technical scrutiny. That news is cheaper in month two than in month fourteen. Early retention shifts some cost toward the front of the case. Explain that to the client at the outset instead of letting the first substantial expert invoice arrive without context.
When an Expert Is Also a Fact Witness
Oregon's protection against expert discovery does not erase firsthand knowledge acquired through participation in the underlying events. In Gwin v. Lynn, 176 P.3d 1249 (Or. 2008), and Ransom v. Radiology Specialists of Northwest, 425 P.3d 412 (Or. 2018), Oregon courts recognized that a witness with expertise can also be examined about facts personally known to that witness and not gathered primarily to render an expert opinion.
A treating physician can be questioned about treatment provided, observations made, and decisions reached during care. A process engineer who stood on the floor during a failed commissioning run can be questioned about what the engineer saw, adjusted, and told others at the time. Questions asking the witness to formulate or disclose opinions developed for the litigation implicate the expert-discovery protection.
Draw that line before instructing a witness not to answer. Treating every question directed to a technically trained witness as protected expert discovery risks withholding discoverable facts and invites a motion to compel. Parties can also agree to exchange expert information. Where reciprocal disclosure will make mediation more productive or narrow an expensive technical dispute, put the agreement in writing and specify what gets disclosed, when, whether depositions are permitted, and how drafts and communications with counsel will be treated.
Front-Load Documents and Electronically Stored Information
Send a focused first document set early enough to have records in hand before the critical depositions. Use what the documents reveal, along with your expert's input, to refine the next round. ORCP 43 reaches documents, electronically stored information, tangible things, testing, sampling, and entry onto property. Requests must describe the material sought with reasonable particularity. The responding party also has a continuing duty to produce responsive, non-objected-to material that later comes into its possession, custody, or control.
Draft around events and elements rather than the dispute as a whole. A request for all documents relating to the parties' business relationship invites an objection and, if answered broadly, can bury the four emails that matter. A request for communications between the plaintiff's operations manager and the defendant's regional sales director during a defined period concerning identified purchase orders produces evidence you can put in front of a witness. ORCP 43 E permits a party to request a conference on ESI sources, search terms, production format, preservation, metadata, privilege, and cost. Within 21 days of the request, the parties must meet and confer. Make the request before anyone has collected and processed the data.
Do not confine the preservation inquiry to corporate email. Depending on the client, relevant material may live in Teams, Slack, WhatsApp, WeChat, iMessage, shared cloud folders, CRM and project-management systems, accounting platforms, personal devices, or messaging applications using automatic deletion settings. In one matter we handled, significant operational communications existed outside the company's ordinary email system. Organizational testimony helped establish where those communications were stored, which in turn supported more targeted ESI discovery. Preservation and discovery should address the systems employees actually use, not merely the systems counsel expects them to use.
Make the ORCP 39 C(6) Deposition Do the Work Interrogatories Would Do
Once the first production gives you some footing, use the organizational deposition to map what the documents do not show. ORCP 39 C(6) allows a party to name an organization as the deponent and describe with reasonable particularity the matters for examination. The organization must designate one or more people to testify on its behalf about matters known or reasonably available to it. Absent good cause or agreement, the organization must provide at least three days' notice identifying its designees and the subjects each will cover. An organizational deposition gives you something written interrogatories do not: a witness under oath and the ability to ask the next question.
When the first problem is figuring out where information lives and who knows what, use the deposition to map the terrain. In one commercial dispute, an organizational deposition revealed information about internal systems and historical records that had not surfaced in the initial document production. That testimony led to more focused discovery and uncovered evidence bearing directly on the parties' competing accounts. Use the deposition to pin down factual positions as well. Ask what the company understood the contract to require during the relevant period, when it first learned of the alleged defect, what inspection it performed, who performed it, and what happened to the results. If the designee testifies that the company has no documents reflecting an inspection, the company will have to explain a later change in position.
The deposition should also identify the people you do not yet know about. Ask who attended the meeting, approved the decision, prepared the analysis, received the complaint, or communicated with outside consultants. Those answers often produce the next useful witness or document. Draft the notice against predictable objections. Tie each topic to identified transactions, documents, decisions, people, and dates. If a topic can fairly be read to demand the opinion of a retained expert, rewrite it. ORCP 36 A also lists depositions on written questions, but they are not interrogatories by another name. ORCP 40 requires a stipulation or leave of court for good cause, and the format gives up the follow-up question that makes oral examination valuable.
Use Third-Party Discovery to Fill the Gaps
When your opponent cannot or will not supply the whole picture, look to independent third parties that created their own records at the time.
In a case we recently handled, third-party records contained technical information that did not appear in the parties' own files. Suppliers, testing companies, consultants, and other independent participants can be valuable discovery sources because their records were often created contemporaneously and outside the litigation process. The same approach works in commercial disputes. Freight forwarders and customs brokers may hold booking confirmations, packing lists, inspection certificates, and communications establishing what shipped and when the first complaint arose. Banks hold payment records. Customers and former employees may possess communications neither litigant produced.
ORCP 55 governs these subpoenas. For a subpoena issued solely to require production or inspection before a deposition, hearing, or trial, the issuing party generally must serve the other nondefaulting parties at least seven days before serving the nonparty, and the subpoena generally must allow at least fourteen days for production unless the court orders otherwise. The advantage is the independent record. These documents were often created for business reasons, before anyone was thinking about the lawsuit.
Build the Record Before You Move to Compel
Documents and organizational testimony carry too much weight in Oregon to let discovery disputes drift. ORCP 46 supplies the motion-to-compel mechanism. UTCR 5.010 requires a good-faith effort to confer before filing a motion under ORCP 36 through 46 and requires the moving party to file a certificate of compliance with the motion. A party moving to quash or modify a subpoena under ORCP 55 must also confer first.
Build the record before filing. Confer in writing. Identify each deficiency precisely and preserve the response. In one matter of ours, organizational testimony established that relevant communications existed on a messaging platform that had not been included in the production. That testimony supported a targeted discovery motion addressing a specific gap rather than a generalized complaint about completeness, and the court ordered additional collection.
Move just as promptly on preservation. A hold letter identifying particular systems, custodians, and automatic-deletion settings can preserve evidence that would otherwise disappear. If the evidence disappears anyway, the letter establishes what the recipient was asked to preserve and when.
Save Requests for Admission for Facts That Matter
ORCP 45 requests for admission do not substitute for interrogatories. They force a position on discrete facts, applications of law to fact, and the genuineness of documents. An admitted matter is conclusively established in the pending case unless the court permits withdrawal or amendment. Oregon generally limits a party to thirty requests absent a court order for good cause, with additional reasonable requests permitted to establish the authenticity and admissibility of qualifying business records.
Use each request to remove work from the case. Ask whether a particular amendment bears the signature of the defendant's chief financial officer, whether the defendant received an identified notice letter, whether it owned the property on the relevant date, or whether specified records are authentic. Those admissions can eliminate foundational testimony and narrow exhibit disputes. Do not spend the limited set too early. RFAs become more useful after the documents and key depositions show what is actually disputed.
Build ORCP 47 E Into Summary Judgment Strategy
Oregon's protection against compelled expert disclosure carries into summary judgment through ORCP 47 E. When expert testimony is required to establish a genuine issue of material fact, the attorney opposing summary judgment can submit a declaration stating that an unnamed qualified expert has been retained and is available and willing to testify to admissible facts or opinions creating a factual dispute. The declaration must rest on an expert who has actually been retained and has actually provided facts or an opinion sufficient to defeat the motion if disclosed.
Counsel cannot sign the declaration and then start looking for somebody who agrees. If ORCP 47 E is likely to matter, the expert work needs to be underway before the motion arrives. For the moving party, the better target is often a defect expert testimony cannot repair: a dispositive legal question, an expired limitations period, a contractual limitation, the absence of a legal duty, a failure of required notice, or a missing historical fact that must come from percipient evidence.
Kummer v. Fred Meyer Stores, Inc., 564 P.3d 951 (Or. Ct. App. 2025), shows the distinction. The plaintiff's ORCP 47 E declaration concerned expert testimony about store inspection practices, but her constructive-knowledge theory also required evidence showing how long the substance had been on the floor. An opinion about inspection practices could not supply that missing historical fact, and the Court of Appeals affirmed summary judgment.
Use Mediation to Direct the Investigation
Oregon litigants can learn more about the opposing expert case in mediation than through formal discovery. A mediation submission may reveal the damages model, causation theory, technical criticism, or proposed fault allocation that no ordinary discovery rule required the other side to disclose. ORS 36.220 generally makes mediation communications confidential, subject to statutory exceptions and applicable written agreements. ORS 36.222 generally restricts disclosure and admission of confidential mediation communications in later adjudicatory proceedings. Materials that were otherwise subject to discovery and were not prepared specifically for mediation do not become confidential merely because someone used them in the mediation.
Treat what you learn as a lead and build the admissible record separately. In one dispute, mediation disclosed the existence of evidence relevant to the opposing party's damages theory that had not surfaced through formal discovery. We pursued the underlying evidence through ordinary discovery and developed it for use in the litigation rather than relying on the protected mediation communication. When mediation reveals a technical causation theory, give it to your expert and let it shape the next round of discovery.
Build the Peripheral Defendant's Exit Record
Limited expert disclosure can keep marginal defendants in multi-party cases longer than the visible evidence justifies. A plaintiff may hesitate to release a component supplier, subcontractor, consultant, or individual officer until its experts finish allocating fault. Codefendants may be just as reluctant to dismiss cross-claims while responsibility remains unsettled. Build the exit record around your client's actual role. Establish the work performed, the decisions your client controlled and did not control, the contractual limits of its responsibility, the specifications it was given, and the evidence connecting its conduct to the claimed loss. Where causation is technical, get your own expert's view of whether a defensible theory against the client exists.
In one multi-defendant case, focused contractual, testimonial, and expert evidence established that one defendant had little connection to the alleged cause of the loss. Developing that record early helped secure the defendant's dismissal well before trial. Peripheral defendants should build an affirmative record for dismissal rather than wait for fault allocation to sort itself out late in the case. A defendant dismissed that far ahead avoids witness preparation, expert work, trial briefing, and management disruption that a later favorable verdict does not give back.
Try the Case Before Discovery Closes
Well before discovery closes, test the case as if trial were next. For each material claim and defense, identify the exhibit that proves it, the witness who can authenticate or explain that exhibit, and the expert testimony required to connect the technical pieces. Then identify what is missing. The exercise exposes problems document review can hide. The best email in the case may have come from a former employee's personal account, with no available witness to authenticate it. Your expert's opinion may rest on an operating temperature no witness has established. A damages model may depend on cost records that do not fit the pleaded contract theory.
Those problems can still be addressed while you can serve another request, notice a deposition, or use a request for admission. They become much harder to fix after discovery closes. The same exercise makes settlement discussions more useful. A client can weigh a case intelligently only when counsel separates evidence that exists from evidence that can actually be admitted and believed. By the pretrial conference, you may still not know exactly what the opposing expert will say. Your own record should be strong enough that those unknowns do not dictate the case.
About Harris Sliwoski
Harris Sliwoski's Oregon litigators represent businesses in commercial disputes and other civil litigation. We work with companies and outside counsel on discovery strategy, expert retention, mediation, dispositive motions, and trial preparation under Oregon's procedural rules.
