Rule 11.Signing of Pleadings, Motions, and Other Papers; Representations to the Court; Sanctions.
Last amended October 28, 2019 · Last verified July 3, 2026
Full Text of Rule 11
Amendment History
Amended July 26, 1990, effective September 1, 1990
further amended December 7, 1999, effective January 1, 2000
further amended September 17, 2019, effective September 17, 2019
further amended October 31, 2019, effective nunc pro tunc October 28, 2019
Plain-English Summary
Rule 11 requires every pleading, written motion, and other paper to be signed, by at least one attorney of record, or by the party if unrepresented, and it treats that signature, filing, or later advocacy as a certification. The signer represents that, after a reasonable inquiry, the filing isn't presented for an improper purpose like harassment or delay, that its legal contentions are warranted by existing law or a nonfrivolous argument to change it, and that its factual assertions and denials have or are likely to have evidentiary support.
When the court finds a violation after notice and a chance to respond, it may sanction the responsible attorneys, firms, or parties. A sanctions motion must be made separately, describe the violation, and go through a 21-day safe-harbor period before it can be filed, giving the other side a chance to withdraw or correct the challenged filing; the court can also raise the issue on its own initiative. Any sanction is limited to what deters repetition, monetary sanctions against a represented party are off the table for a violation of the legal-contentions certification, and Rule 11 does not reach discovery disclosures, requests, responses, or motions, which Rules 26 through 37 govern instead.
Frequently Asked Questions
What does signing a pleading or motion certify under Rule 11?
That after a reasonable inquiry, the filing isn't presented for an improper purpose, its legal contentions are warranted by existing law or a nonfrivolous argument to change it, and its factual assertions and denials have or are likely to have evidentiary support.
What is the "safe harbor" period before a Rule 11 sanctions motion can be filed?
Rule 11(c)(1)(A) requires the motion to be served on the other side first and gives them 21 days, or another period the court sets, to withdraw or correct the challenged filing before the motion can be filed with the court.
Does Rule 11 apply to discovery motions and responses?
No. Rule 11(d) excludes disclosures and discovery requests, responses, objections, and motions, which are instead governed by Rules 26 through 37.