Rule 11 and Inherent-Power Sanctions: The Safe Harbor, Fee Awards, and Attorney Conduct

Summary. Sanctions practice runs on four overlapping sources of authority that do different things, and conflating them is the most common reason sanctions motions fail. Rule 11 reaches papers filed with the court and carries a mandatory safe harbor that defeats most motions on procedure alone. Rule 26(g) and Rule 37 govern discovery, where Rule 11 does not apply. Section 1927 reaches attorneys who multiply proceedings vexatiously. The inherent power reaches bad-faith conduct anywhere, subject to the causation limit the Supreme Court imposed in Goodyear. This article separates them, explains what reasonable inquiry requires, walks the safe harbor step by step, and covers the fee-award mechanics that determine what a sanction is worth.

The motion arrives styled "Motion for Sanctions Under Rule 11, 28 U.S.C. § 1927, and the Court's Inherent Power," and it complains about a discovery response, an interrogatory answer, and a deposition objection. It attaches no evidence of a prior service, and it was filed the week after the case settled.

That motion loses on four independent grounds before anyone reaches the merits. Rule 11 does not apply to discovery. The safe harbor was not satisfied. Section 1927 requires a showing about the attorney specifically, not the party. And monetary sanctions under Rule 11 are unavailable when the offending paper was withdrawn or the case resolved before the safe harbor expired.

Sanctions practice punishes imprecision on both sides of the "v." Knowing which authority does what is not a technicality; it is most of the analysis.

Four sources of authority

Choose deliberately. A motion aimed at a frivolous complaint is a Rule 11 motion. A motion aimed at obstructive discovery is a Rule 37 or Rule 26(g) motion. A motion aimed at a lawyer who kept litigating after the claim was demonstrably dead is a § 1927 motion. A motion aimed at fabricated evidence or a fraud on the court is an inherent-power motion. Kitchen-sink motions signal to the judge that counsel has not thought about which rule the conduct violated, and they invite the response that the movant is the one engaged in tactical excess.

Rule 11: what the signature means

Fed. R. Civ. P. 11(b) provides that by presenting a paper to the court — signing, filing, submitting, or later advocating it — an attorney or unrepresented party certifies that to the best of the person's knowledge, information, and belief, formed after an inquiry reasonable under the circumstances:

1. it is not being presented for any improper purpose, such as to harass, cause unnecessary delay, or needlessly increase the cost of litigation;
2. the claims, defenses, and other legal contentions are warranted by existing law or by a nonfrivolous argument for extending, modifying, or reversing existing law or for establishing new law;
3. the factual contentions have evidentiary support or, if specifically so identified, will likely have evidentiary support after a reasonable opportunity for further investigation or discovery; and
4. the denials of factual contentions are warranted on the evidence or, if specifically so identified, are reasonably based on belief or a lack of information.

"Or later advocating." This phrase, added in 1993, is the one practitioners forget. A complaint that was reasonable when filed can become sanctionable when counsel continues to press it after discovery establishes it is baseless. The certification is continuing as to advocacy, though there is no duty to amend a paper that was proper when signed.

The standard is objective. Good faith is not a defense. The question is whether a competent attorney, after reasonable inquiry, could have formed the belief. Empty-head, pure-heart is expressly not enough, as the advisory committee put it.

What "reasonable inquiry" requires

There is no checklist, but courts consistently weigh:

• Time available. A statute of limitations expiring in three days justifies less pre-filing investigation than a claim with two years left.
• Whether counsel had to rely on the client. Reliance on a client's account is generally reasonable, but not where it is implausible on its face, internally inconsistent, or contradicted by documents counsel possesses.
• Whether the facts were in the opponent's exclusive control. This is what the "likely to have evidentiary support after discovery" allowance is for — but it must be specifically identified as such in the paper. A blanket assertion that everything will be proved later does not satisfy the rule.
• The complexity of the legal question, and whether counsel researched it. A contention foreclosed by binding circuit precedent that counsel never found is a classic Rule 11 violation; the same contention, presented with an express argument that the precedent should be overruled, is protected by the "nonfrivolous argument for extending or modifying" clause.
• Whether counsel is a specialist. Courts hold experienced practitioners in a field to what a competent practitioner in that field would have known.
• Whether the claim was investigated after filing. The "later advocating" clause makes this decisive in many cases.

What is not sanctionable: losing. A claim that fails on summary judgment is not thereby frivolous, and courts say so repeatedly. Rule 11 is not a fee-shifting statute for prevailing parties, and motions filed as though it were are routinely denied with a warning.

The safe harbor

Rule 11(c)(2) is where most motions die.

The procedure, exactly:

1. The motion must be made separately from any other motion. Not a section of an opposition brief. Not a footnote. A standalone motion.
2. It must describe the specific conduct alleged to violate Rule 11(b).
3. It must be served on the offending party — but not filed or presented to the court.
4. If the challenged paper is withdrawn or appropriately corrected within 21 days after service (or a longer period the court sets), the motion may not be filed.
5. Only after the 21 days expire without withdrawal or correction may the motion be filed.

Consequences of getting it wrong:

• A motion filed without prior service is denied, almost invariably, without reaching the merits. Courts describe the safe harbor as mandatory and not subject to harmless-error analysis in most circuits.
• A warning letter is not a substitute for the motion in most circuits. The rule says "motion," and a majority of courts require service of the actual motion papers. Some circuits are more forgiving; do not rely on it.
• If the case settles or is dismissed before the 21 days run, the motion can no longer be filed — the opportunity to withdraw has been mooted. This is a real strategic consideration: a party that wants sanctions must move early enough that the safe harbor expires while the case is live.

Sua sponte sanctions bypass the safe harbor — Rule 11(c)(3) — but Rule 11(c)(5)(B) prohibits monetary sanctions on the court's own initiative unless the show-cause order issued before voluntary dismissal or settlement. Courts have also required that sua sponte sanctions meet a higher standard akin to bad faith, on the theory that the respondent had no chance to withdraw.

Withdrawal is not an admission. A party served with a Rule 11 motion should evaluate the challenged paper honestly and withdraw or amend if the criticism has force. Doing so ends the exposure entirely, and courts do not treat withdrawal within the safe harbor as evidence of anything.

Who can be sanctioned, and how

Rule 11(c)(1) permits sanctions against the attorney, the law firm, and the party, and provides that the law firm must be held jointly responsible for a violation by its partner, associate, or employee absent exceptional circumstances.

Represented parties. Rule 11(c)(5)(A) prohibits monetary sanctions against a represented party for violating Rule 11(b)(2) — the legal-contentions prong. The theory is that clients rely on counsel for legal judgments. Parties can be sanctioned monetarily for factual misrepresentations under 11(b)(3). Business Guides, Inc. v. Chromatic Communications Enterprises, Inc., 498 U.S. 533 (1991), held that a represented party who signs a paper is subject to the same objective reasonable-inquiry standard as an attorney.

The nature of the sanction. Rule 11(c)(4): a sanction "must be limited to what suffices to deter repetition of the conduct or comparable conduct by others similarly situated." It may include nonmonetary directives, a penalty paid to the court, or — if imposed on motion and warranted for effective deterrence — an order paying part or all of the reasonable attorney's fees and expenses directly resulting from the violation.

Rule 11 is deterrent, not compensatory. That framing matters: courts frequently award far less than the movant's actual fees, and awards of a few thousand dollars, a reprimand, or a CLE requirement are common outcomes even where the violation is clear.

Discovery is a different regime

Rule 11(d) is explicit: the rule "does not apply to disclosures and discovery requests, responses, objections, and motions under Rules 26 through 37." A Rule 11 motion aimed at an interrogatory answer is a category error.

Rule 26(g) is the discovery analogue and is stronger in one respect. Every disclosure, request, response, and objection must be signed, certifying after reasonable inquiry that a disclosure is complete and correct, and that a request, response, or objection is consistent with the rules and warranted by existing law, not interposed for an improper purpose, and neither unreasonable nor unduly burdensome or expensive given the needs of the case.

The sanction is mandatory: "If a certification violates this rule without substantial justification, the court, on motion or on its own, must impose an appropriate sanction." There is no safe harbor in Rule 26(g). This is an underused provision, particularly against boilerplate objections and overbroad requests, and it is the right vehicle for a party facing 200 requests for production that no one could have believed were proportional.

Rule 37 supplies the graduated remedies:

• 37(a)(5): fee-shifting on a motion to compel, which is presumptive — the losing side pays unless the position was substantially justified or an award would be unjust. Practitioners underuse this too.
• 37(b): sanctions for violating a discovery order, up to and including establishment orders, preclusion, striking pleadings, dismissal, default, and contempt.
• 37(c)(1): exclusion of information not properly disclosed under Rule 26(a) or (e), unless the failure was substantially justified or harmless — automatic and self-executing, which makes it the most dangerous provision in the discovery rules.
• 37(d): sanctions for failing to appear at a deposition, answer interrogatories, or respond to requests for production.
• 37(e): the exclusive framework for lost electronically stored information, requiring prejudice for curative measures and intent to deprive for the severe sanctions of an adverse-inference instruction, dismissal, or default.

Section 1927

28 U.S.C. § 1927: "Any attorney or other person admitted to conduct cases in any court of the United States... who so multiplies the proceedings in any case unreasonably and vexatiously may be required by the court to satisfy personally the excess costs, expenses, and attorneys' fees reasonably incurred because of such conduct."

Features that distinguish it:

• Attorneys only. Not parties, not law firms in some circuits (courts split on whether a firm can be liable).
• No safe harbor, and no separate-motion requirement.
• Conduct-based, not paper-based. It reaches a course of conduct — refusing to dismiss a claim after it became untenable, relitigating decided issues, opposing motions without any basis, taking positions that force unnecessary motion practice.
• It does not reach the initial filing. By its terms it requires multiplying proceedings, so most circuits hold that filing a frivolous complaint alone is not § 1927 conduct — Rule 11 covers that.
• The state of mind requirement splits the circuits. Some require subjective bad faith; others permit objective recklessness or a finding that counsel knew or should have known the claim was frivolous. Know your circuit's formulation before briefing.
• Compensatory: the award is the excess costs actually caused, which makes § 1927 more valuable than Rule 11 for a party that wants to be made whole.

Inherent power

Federal courts possess inherent authority to sanction conduct that abuses the judicial process. Chambers v. NASCO, Inc., 501 U.S. 32 (1991), is the foundational case: the Court upheld a nearly $1 million fee award against a litigant who engaged in a scheme of fraudulent transfers, false representations to the court, and delay, and held that the inherent power is not displaced by Rule 11 or § 1927 even where those provisions could reach some of the conduct.

What it reaches that the rules do not:

• Conduct outside the courtroom that affects the litigation — the Chambers defendant's fraudulent transfers occurred before the case was filed.
• Fraud on the court, including fabricated evidence and perjury.
• Bad-faith conduct by parties, where § 1927 reaches only attorneys.
• Spoliation of evidence other than ESI, which Rule 37(e) does not cover.
• Conduct in cases where a rule's procedural prerequisites cannot be met.

The limits:

• Bad faith is required. Negligence, and even gross negligence, do not suffice under most formulations. Courts require a specific finding.
• Due process: notice and an opportunity to be heard, and for sanctions that are punitive in nature and substantial, some circuits require criminal-contempt protections.
• Restraint: because the power is not subject to the checks the rules impose, courts are instructed to exercise it with restraint and discretion, and to resort to the rules where they apply.
• Causation. Goodyear Tire & Rubber Co. v. Haeger, 581 U.S. 101 (2017), is the most important recent decision in this area. A unanimous Court held that a fee award under the inherent power is limited to the fees the innocent party would not have incurred but for the misconduct. The award must be compensatory rather than punitive, and a court cannot simply award all fees incurred after the misconduct began without establishing that causal link. Courts may still shift all fees from a point forward where the misconduct so pervaded the case that the entire proceeding was tainted — the Court expressly allowed for that — but the finding must be made.

Practical consequence of Goodyear: a movant seeking inherent-power fees must build a causal record: which tasks, which time entries, which motions would not have been necessary. Block-billed fee petitions asking for everything post-dating the misconduct get remanded.

Related fee-shifting authorities

Prevailing-party statutes. Many claims carry fee-shifting provisions with their own standards. Under Christiansburg Garment Co. v. EEOC, 434 U.S. 412 (1978), a prevailing defendant in a Title VII case may recover fees only where the action was frivolous, unreasonable, or without foundation, or where the plaintiff continued to litigate after it clearly became so — a deliberately asymmetric standard applied across many civil rights statutes. Fox v. Vice, 563 U.S. 826 (2011), held that where a suit includes both frivolous and non-frivolous claims, a defendant may recover only fees that it would not have incurred but for the frivolous claims — the same but-for logic later applied in Goodyear.

Appellate sanctions. Fed. R. App. P. 38 permits just damages and costs for a frivolous appeal, on motion or on the court's own initiative after notice. 28 U.S.C. § 1912 is the statutory counterpart. Rule 11 does not apply on appeal.

Contempt. Civil contempt to coerce compliance or compensate; criminal contempt to punish, with the attendant procedural protections. Rule 45(g) supplies the subpoena-specific version.

State analogues. Most states have a Rule 11 counterpart, and a number of them lack the safe harbor — including some that retain the pre-1993 federal mandatory-sanctions structure. Several states also have separate frivolous-litigation statutes permitting fee awards on a lower showing. Do not assume the federal architecture transfers.

Professional responsibility. Independent of any sanction, Model Rule 3.1 prohibits asserting a position without a basis in law and fact that is not frivolous; Rule 3.3 imposes a duty of candor including the obligation to disclose directly adverse controlling authority not disclosed by opposing counsel; Rule 3.4 governs fairness to opposing party and counsel; and Rule 8.4(c) reaches dishonesty. A sanctions order frequently generates a referral, and in many jurisdictions judges are required to report conduct raising a substantial question about a lawyer's honesty or fitness.

Hallucinated citations: the newest category

Since 2023 the fastest-growing category of sanctions in American courts involves briefs containing case citations that do not exist, generated by large language models and filed without verification.

The pattern. Counsel uses a generative AI tool for research or drafting. The tool produces confident, well-formatted citations to opinions that were never written, or to real cases holding the opposite of what is claimed. Nobody pulls the cases. Opposing counsel cannot find them. The court asks for copies, and the answer is either silence or, worse, fabricated excerpts.

The leading case. Mata v. Avianca, Inc., 678 F. Supp. 3d 443 (S.D.N.Y. 2023), sanctioned two attorneys and their firm for a brief containing six nonexistent decisions. The court's analysis is worth reading in full because it makes clear what actually drew the sanction: not the use of the tool, but the failure to verify, and then the failure to come clean when confronted. The opinion emphasized that the attorneys "continued to stand by the fake opinions after judicial orders called their existence into question."

Appellate treatment. Park v. Kim, 91 F.4th 610 (2d Cir. 2024), referred counsel to the circuit's grievance panel after a brief cited a nonexistent decision, holding that the attorney's conduct fell "well below the basic obligations of counsel" and that Rule 11's reasonable-inquiry requirement plainly extends to verifying that cited authority exists.

What courts have done: monetary sanctions, fee awards to opposing counsel, mandatory CLE, referrals to disciplinary authorities, striking of briefs, dismissal of claims, and public opinions naming counsel — which for many practitioners is the most severe consequence.

Standing orders. A large and growing number of federal judges have issued standing orders requiring disclosure of generative AI use in drafting, certification that every citation has been verified against the original source, or both. Check the judge's individual rules before filing anything in an unfamiliar court.

The professional obligation is not new. Rule 11(b)(2) has always required that legal contentions be warranted by existing law, and Model Rule 1.1's competence duty has always required understanding the tools you use. What is new is a tool that fabricates fluently, and a workflow that makes it easy to skip verification.

The practice rule is simple: read every case you cite, in the original reporter or database, before the brief is filed. Verify the citation, the holding, the procedural posture, and whether it remains good law. That was always the standard. The tools have made the cost of failing it much higher and much more public.

Practical guidance

Before filing anything:

• Verify every citation against the original source, and confirm current validity.
• Confirm factual allegations have a source you could identify to a judge. Where they rest on information likely to be established in discovery, say so in the pleading, in the specific manner Rule 11(b)(3) contemplates.
• Find and address adverse authority. Rule 3.3 requires disclosure of directly adverse controlling authority, and distinguishing it is far better advocacy than hoping nobody looks.
• Reassess after discovery. The "later advocating" clause means that a summary judgment opposition presenting a claim that discovery gutted is independently sanctionable.

Before moving for sanctions:

• Identify the right authority for the conduct at issue, and use only that one unless multiple genuinely apply.
• Serve the Rule 11 motion and wait 21 days. Calendar the date. Do not file early.
• Consider whether a letter accomplishes the goal. Most sanctionable conduct is corrected when identified specifically and privately, and a motion converts a correctable problem into a fight the judge must referee.
• Document causation. For § 1927 and inherent-power fee requests, keep contemporaneous records of the specific work made necessary by the misconduct, and expect to produce time entries.
• Ask whether you actually want this. Sanctions motions consume judicial goodwill. Judges dislike them, they are granted infrequently, and a denied motion becomes part of how the court sees the moving lawyer.

If you receive a sanctions motion:

• Read the challenged paper with fresh eyes, ideally with a colleague who did not write it.
• If the criticism has merit, withdraw or amend within the safe harbor. This is not a concession; it is what the rule is for, and it ends the exposure.
• If it does not, respond substantively, and consider whether the motion itself was interposed for an improper purpose — Rule 11 applies to sanctions motions, and courts have sanctioned movants.
• Notify your carrier. Professional liability policies frequently cover sanctions defense, and late notice is a coverage problem.
• Involve separate counsel where the attorney's and the client's interests diverge, which they do as soon as the question becomes who was responsible for the misrepresentation.

The point of all of it

Every one of these provisions is a compromise between two failure modes. A system with no sanctions authority invites filings that impose real costs on people who did nothing wrong. A system with aggressive sanctions authority chills the novel claim, the good-faith extension of law, and the plaintiff whose case looks weak until discovery is complete — and the second failure is worse, because most legal change begins as an argument that established authority forecloses.

The rules resolve that tension by making sanctions hard to obtain and modest when obtained, and by giving the accused a clean exit: withdraw the paper, and it is over. Courts take the safe harbor seriously for exactly that reason. The practitioner's job on both sides is to respect that design — to file papers you have actually verified, and to move for sanctions only when the conduct is genuinely outside the range of ordinary advocacy and you have followed the procedure to the letter.

Calculating and defending a fee award

When a sanction takes the form of fees, the amount is litigated separately and by rules of its own.

The lodestar. Reasonable hours multiplied by a reasonable hourly rate, with the rate set by the prevailing market rate in the relevant community for lawyers of comparable skill and experience. The movant bears the burden of documentation, and courts routinely reduce for:

• Block billing that prevents task-by-task evaluation.
• Vague entries — "attention to file," "review documents," "conference re case."
• Overstaffing, particularly multiple attorneys attending the same hearing or conference.
• Clerical work billed at attorney rates.
• Excessive hours relative to the complexity of the task.
• Unsuccessful or unrelated work, which after Fox v. Vice and Goodyear must be excluded.

Practical documentation habits. A party that expects to seek fees should, from the moment the misconduct is identified, maintain a separate matter number or task code for work caused by it. Reconstructing causation from a year of billing entries is expensive and produces exactly the block-billed petition courts cut.

Rate evidence. Declarations from local practitioners, fee surveys, prior awards in the district, and the movant's own actual billing rates. Courts are skeptical of national-firm rates in smaller markets absent a showing that comparable local counsel were unavailable.

Ability to pay. Because Rule 11 sanctions are limited to what suffices to deter, a respondent's financial circumstances are relevant, and courts have reduced awards substantially — sometimes to nominal amounts — on a showing of inability to pay. The respondent bears the burden of raising and substantiating it, and doing so requires disclosing financial information, which is a decision with its own consequences.

Allocation. Where multiple lawyers, a firm, and a client all bear some responsibility, courts allocate. Rule 11(c)(1)'s joint-firm-responsibility provision does most of the work on the firm side; as between attorney and client, the analysis turns on who supplied the false facts and who made the legal judgments.

Appeal

Sanctions orders are reviewed for abuse of discretion, a standard set in Cooter & Gell v. Hartmarx Corp., 496 U.S. 384 (1990), which applies the same deferential standard to the underlying legal conclusions embedded in the sanctions determination. Cooter & Gell also held that a voluntary dismissal does not divest the district court of jurisdiction to impose Rule 11 sanctions, and that the rule does not authorize an award of appellate fees for defending the sanction on appeal.

Two further jurisdictional points. Willy v. Coastal Corp., 503 U.S. 131 (1992), held that a district court may impose Rule 11 sanctions even in a case it ultimately determines it lacked subject-matter jurisdiction to hear — the sanction concerns the integrity of the proceeding rather than the merits. And a sanctions order against an attorney who is not a party raises appealability questions: an order imposing sanctions on counsel is generally appealable by counsel, but the timing depends on whether it is final and whether the underlying case has concluded, and counsel who wants to appeal must ordinarily be separately noticed and heard below.

Preserve the record. A respondent should insist on specific findings: which conduct violated which provision, what the state-of-mind finding is, and how the amount was calculated. Orders that recite conclusions without findings are the ones most often vacated, and the request for findings costs nothing.

Vexatious litigant orders and filing injunctions

At the far end of the spectrum sits the pre-filing injunction: an order barring a person from filing new actions without leave of court. Federal courts derive the authority from the All Writs Act, 28 U.S.C. § 1651, and from their inherent power, and most states have an analogous statute or rule.

Because such an order restricts access to the courts, the circuits have converged on a set of requirements:

• Notice and an opportunity to be heard before entry.
• An adequate record of the litigant's filings, usually an itemized list showing the number, the outcomes, and the repetition.
• Substantive findings that the filings are frivolous or harassing rather than merely numerous or unsuccessful.
• A narrowly tailored order — limited to the subject matter, the parties, or the court involved, rather than a blanket bar on all litigation.

These orders are entered against pro se litigants far more often than against represented parties, and courts are appropriately cautious: a litigant with a genuine grievance and no lawyer will often file badly, and volume alone is not vexatiousness. The workable version screens new filings through a magistrate judge rather than forbidding them, which preserves access while eliminating the burden on defendants of answering the twentieth complaint about the same events.

A word on removal, remand, and § 1447(c). One fee-shifting provision sits outside the sanctions framework but functions like one. When a case is remanded, 28 U.S.C. § 1447(c) permits an award of "just costs and any actual expenses, including attorney fees, incurred as a result of the removal." The Supreme Court held in Martin v. Franklin Capital Corp. that fees should ordinarily be awarded only where the removing party lacked an objectively reasonable basis for removal. No bad faith is required and no safe harbor applies, which makes it one of the more accessible fee remedies in federal practice — and a reason to research removal grounds with the same care Rule 11 demands of a complaint.

Related articles

• Hallucinated Citations, Rule 11, and Generative AI in Legal Filings — the AI cases in depth.
• Litigation Holds, Spoliation, and Rule 37(e) — the ESI-specific sanctions framework.
• A Practical Discovery Refresher — where Rule 26(g) and Rule 37 operate.
• Drafting a Complaint That Survives a Motion to Dismiss — the pre-filing inquiry in practice.
• Rule 37(c)(1) Preclusion of Undisclosed Evidence: A Practical Guide — the self-executing sanction.
• Federal Appellate Practice: Preserving Error, Standards of Review, and Briefs That Win — FRAP 38 and frivolous appeals.
• Rule 45 Subpoenas to Nonparties — the Rule 45(d)(1) duty and its sanction.
• Rule 11 Sanctions and Safe Harbor Checklist — the procedural worklist.
• Litigation Sanctions and Professional Responsibility Toolkit — the full roadmap.
• Evaluating a New Civil Case — the intake discipline that prevents most of this.

This article is provided for general informational purposes and does not constitute legal advice. Circuits differ on the standard for § 1927 and on several safe-harbor questions, state sanctions rules vary substantially from the federal rule, and individual judges' standing orders impose additional requirements. Consult qualified litigation counsel before filing or responding to a sanctions motion.