2.3 Preliminary Injunctions, TROs & Pretrial Conferences

Key Takeaways

  • A preliminary injunction requires notice and a showing that the movant is likely to succeed on the merits, likely to suffer irreparable harm without relief, favored by the balance of equities, and supported by the public interest (Winter v. NRDC, 2008).
  • A TRO may issue without notice only on specific sworn facts showing immediate and irreparable injury plus the attorney's written certification of notice efforts, and it expires within 14 days unless extended for good cause for a like period or by consent (Rule 65(b)).
  • Rule 65(c) requires the movant to give security for costs and damages of a party wrongfully enjoined, and Rule 65(d) binds the parties, their officers, agents, employees, and attorneys, and others in active concert who receive actual notice.
  • Orders granting or denying preliminary injunctions are immediately appealable under 28 U.S.C. § 1292(a)(1), but TROs generally are not.
  • A Rule 16(b) scheduling order may be modified only for good cause and with the judge's consent, while the order after a final pretrial conference may be modified only to prevent manifest injustice (Rule 16(e)).
Last updated: September 2026

2.3 Preliminary Injunctions, TROs & Pretrial Conferences

Before a case reaches discovery, trial, or judgment, a party may need immediate court protection, and the court needs a plan for managing the case. Rule 65 governs the first problem through preliminary injunctions and temporary restraining orders (TROs). Rule 16 governs the second through scheduling orders, pretrial conferences, and pretrial orders. NCBE's outline lists both under pretrial procedures.

Preliminary Injunctions (Rule 65(a))

A preliminary injunction preserves the parties' positions until the court can decide the merits.

  • Notice required: A court may issue a preliminary injunction only on notice to the adverse party (Rule 65(a)(1)).
  • The four-factor test: Under Winter v. Natural Resources Defense Council, Inc. (2008), the movant must establish that it is:
    1. Likely to succeed on the merits;
    2. Likely to suffer irreparable harm in the absence of preliminary relief (a mere "possibility" of irreparable harm is not enough);
    3. Favored by the balance of equities; and
    4. Seeking an injunction that is in the public interest.
  • Irreparable harm: Harm is irreparable when money damages awarded later cannot adequately fix it—for example, loss of unique real property, destruction of evidence, or continuing constitutional violations. Ordinary financial loss that can be calculated and paid later usually is not irreparable.
  • Consolidation: Before or after the hearing begins, the court may advance the trial on the merits and consolidate it with the hearing (Rule 65(a)(2)).
  • Not a merits ruling: Findings made at the preliminary-injunction stage are not binding at trial, because the parties proceed on a less complete record (University of Texas v. Camenisch, 1981).

Temporary Restraining Orders (Rule 65(b))

A TRO is short-term emergency relief, sometimes issued before the opposing party can be heard.

  • Issuing without notice: The court may issue a TRO without written or oral notice only if:
    1. Specific facts in an affidavit or verified complaint clearly show that immediate and irreparable injury will result before the adverse party can be heard; and
    2. The movant's attorney certifies in writing any efforts made to give notice and why notice should not be required.
  • Contents: A TRO issued without notice must state the date and hour it issued, describe the injury and why it is irreparable, state why it issued without notice, and be promptly filed.
  • Duration: It expires at the time the court sets, not to exceed 14 days, unless the court extends it for good cause for a like period or the adverse party consents to a longer extension; the reasons for an extension must be entered in the record.
  • Speedy hearing: If a TRO issues without notice, the motion for a preliminary injunction must be set for hearing at the earliest possible time, and the adverse party may move to dissolve or modify the TRO on 2 days' notice (or shorter notice the court sets).

Security, Form, Scope, and Appeals

IssueRule
Security (Rule 65(c))The court may issue a preliminary injunction or TRO only if the movant gives security in an amount the court considers proper to pay costs and damages of a party found to have been wrongfully enjoined. The United States and its officers and agencies need not give security.
Form (Rule 65(d)(1))Every order must state the reasons it issued, state its terms specifically, and describe in reasonable detail—without referring to the complaint or another document—the acts restrained or required.
Who is bound (Rule 65(d)(2))The parties; the parties' officers, agents, servants, employees, and attorneys; and other persons in active concert or participation with them—but only those who receive actual notice by personal service or otherwise.
Scope of reliefIn Trump v. CASA, Inc. (2025), the Supreme Court held that "universal" injunctions barring enforcement of a policy against anyone likely exceed the equitable authority Congress gave federal courts; relief should be no broader than needed to give complete relief to the plaintiffs before the court. Class actions under Rule 23 remain available.
AppealsOrders granting, continuing, modifying, refusing, or dissolving injunctions are appealable immediately under 28 U.S.C. § 1292(a)(1). TROs generally are not, unless the order in substance operates as a preliminary injunction (for example, it was extended well beyond Rule 65's limits after an adversary hearing).
FeatureTemporary Restraining OrderPreliminary Injunction
Notice to adversaryNot required if Rule 65(b)(1) showing is madeRequired
Maximum duration14 days, plus one good-cause extension of like length or consentUntil final judgment or dissolution
EvidenceAffidavit or verified complaintHearing on a fuller record
Immediate appealGenerally noYes, § 1292(a)(1)

Pretrial Conferences, Scheduling Orders, and Pretrial Orders (Rule 16)

Purposes and Scheduling Orders

Rule 16(a) authorizes pretrial conferences to expedite disposition, establish early management, discourage wasteful pretrial activity, improve trial preparation, and facilitate settlement.

  • Scheduling order (Rule 16(b)): Except in exempt categories of cases, the judge must issue a scheduling order after receiving the parties' Rule 26(f) report or consulting the parties. It must issue as soon as practicable and, unless the judge finds good cause for delay, within the earlier of 90 days after any defendant has been served or 60 days after any defendant has appeared.
  • Required contents: The order must limit the time to join other parties, amend the pleadings, complete discovery, and file motions. It may also address disclosure of electronically stored information, agreements under Federal Rule of Evidence 502, and—under amendments effective December 1, 2025—the timing and method for complying with Rule 26(b)(5)(A)'s privilege-log requirements.
  • Modification: A schedule may be modified only for good cause and with the judge's consent (Rule 16(b)(4)). A party who seeks to amend a pleading after the scheduling-order deadline must usually show good cause under Rule 16(b)(4) before Rule 15's liberal standard applies.

Pretrial Conferences and Orders

  • Attendance and authority: A represented party must authorize at least one attorney to make stipulations and admissions about matters reasonably anticipated for discussion, and the court may require a party or representative to be present or reasonably available to consider settlement (Rule 16(c)(1)).
  • Topics (Rule 16(c)(2)): Simplifying issues and eliminating frivolous claims or defenses; amending pleadings; obtaining admissions and stipulations; avoiding unnecessary proof and cumulative evidence; limiting expert testimony; controlling discovery; identifying witnesses and documents; settlement and alternative dispute resolution; and the order of trial.
  • Pretrial orders (Rule 16(d)): After any conference, the court should issue an order reciting the action taken, and that order controls the course of the action unless the court modifies it.
  • Final pretrial conference and order (Rule 16(e)): Held as close to trial as reasonable and attended by at least one attorney who will conduct the trial. The resulting order may be modified only to prevent manifest injustice, so claims, defenses, witnesses, or exhibits omitted from it may be excluded at trial.
  • Sanctions (Rule 16(f)): If a party or attorney fails to appear, is substantially unprepared, fails to participate in good faith, or disobeys a scheduling or pretrial order, the court may impose Rule 37(b)(2)(A)(ii)–(vii) sanctions and must order payment of reasonable expenses, including attorney's fees, unless the noncompliance was substantially justified or an award would be unjust.
  • Multidistrict litigation: New Rule 16.1, effective December 1, 2025, encourages transferee courts in multidistrict litigation to hold an early management conference.
Test Your Knowledge

A software company sued a former engineer in federal court, alleging that she took trade secrets to a competitor, and moved for a preliminary injunction barring her from working on a competing product. At the hearing, the company proved that it would probably win on the merits but offered only testimony that it 'might possibly' lose some customers if she kept working, and it conceded that any lost sales could be precisely calculated from its contracts. How should the court rule on the motion?

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Test Your Knowledge

After a final pretrial conference, the court entered a final pretrial order listing each party's witnesses and exhibits. Two days before trial, the defendant learned that a former employee could offer helpful testimony that it could have discovered months earlier with ordinary diligence. The defendant moved to add the witness. The plaintiff showed that it had not deposed the witness and would be unfairly surprised. What standard governs the defendant's request?

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