If you’re involved in a FINRA arbitration, discovery and motion practice can feel like the part of the case where everything suddenly gets more technical. One side is asking for documents, the other side is objecting, deadlines start stacking up, and a motion to dismiss may appear before the hearing ever starts.
That can be intimidating for beginners. It can also be the stage where a securities arbitration case starts to take shape.
In general terms, discovery is where parties exchange information and documents that may support or weaken claims and defenses. Motions are formal requests asking the arbitrators to decide a dispute about procedure, evidence, timing, or sometimes even whether part of the case can go forward at all. FINRA’s rules give this process structure, but the practical reality is that strategy, timing, and documentation often matter just as much as the text of the rulebook.
In this post you’ll learn how discovery works in FINRA arbitration, how motions fit into the process, what beginners often overlook, and how these issues can affect both claimants and respondents. If you want a broader overview of how document fights and early motion practice work across disputes, this plain-English overview of discovery and early dismissal fights provides helpful context.
<aside> 💡 Scroll to the bottom for every post in this series.
</aside>
Discovery is the exchange of documents and information between the parties. In customer cases, FINRA provides a Discovery Guide that includes two Document Production Lists: one identifying categories of documents presumptively discoverable from the firm or associated person, and one identifying categories presumptively discoverable from the customer. FINRA describes the guide as a resource intended to help parties exchange documents without arbitrator or staff intervention. FINRA’s Customer Code also states that parties are expected to cooperate “to the fullest extent practicable” in discovery. FINRA Discovery Guide; FINRA Rule 12505
That cooperative structure matters because FINRA arbitration is not supposed to mirror full-blown court discovery. Discovery is generally narrower, faster, and more document-focused than litigation in many courts. Depositions are also limited in FINRA arbitration, and non-party subpoenas are not something counsel can issue on their own; FINRA explains that only arbitrators may issue subpoenas to non-parties, typically after a written motion. FINRA Arbitration Discovery Overview
For beginners, one helpful way to think about FINRA discovery is this: it is not unlimited, but it is often where the most important factual record gets built.
In customer arbitrations, FINRA’s Document Production Lists identify the documents presumed to be discoverable. These lists often include account records, correspondence, notes, marketing materials, supervisory materials, tax records, and other categories that may relate to suitability, misrepresentations, unauthorized trading, damages, reliance, or other core issues depending on the allegations. FINRA Discovery Guide; FINRA Rule 12506
“Presumptively discoverable” does not mean every possible document comes in automatically. It generally means the listed categories are assumed to be discoverable unless there is a valid objection or a panel orders otherwise. That creates a starting point. From there, parties may also make additional discovery requests outside the lists. FINRA Rule 12506
This is often where a case becomes more strategic:
In practical terms, discovery often reveals whether a case is really about unsuitable recommendations, failure to supervise, unauthorized trading, omissions, concentration, overstatement of risk, or something narrower.
No. FINRA states that the Discovery Guide is for customer cases only. It does not apply to arbitrations under the Industry Code in the same way. FINRA Discovery Guide; Regulatory Notice 24-16