(a) Signature. Every pleading, written motion, and other paper must be signed by at least one attorney of record licensed in the State of Idaho, in the individual attorney's name, or by a party personally if the party is unrepresented. The paper must state the signer's address, e-mail address, and telephone number. Unless a rule or statute specifically states otherwise, a pleading need not be verified or accompanied by an affidavit. The court must strike an unsigned paper unless the omission is promptly corrected after being called to the attorney's or party's attention.
Rule 11.Signing pleadings, motions, and other papers; representations to the court; sanctions
Title III: Pleadings; Motions; Scheduling · Last amended July 1, 2016 · Last verified July 14, 2026
In one sentenceRule 11 requires signed pleadings and motions, holds the signer to certifications about good faith and factual support, and authorizes sanctions when those certifications are violated.
Full Text of Rule 11
(b) Representations to the court. By presenting to the court a pleading, written motion, or other paper, whether by signing, filing, or 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.
(c) Sanctions.
(1) In general. If, after notice and a reasonable opportunity to respond, the court determines that Rule 11(b) has been violated, the court must impose an appropriate sanction on any attorney, law firm, or party that violated the rule or is responsible for the violation. A law firm may be held jointly responsible for a violation committed by its partner, associate, or employee.
(2) Motion for sanction. A motion for sanctions must be made separately from any other motion and must describe the specific conduct that allegedly violates Rule 11(b). The motion must be served under Rule 5, but it must not be filed or be presented to the court if the challenged paper, claim, defense, contention, or denial is withdrawn or appropriately corrected within 21 days after service or within another time the court sets. If warranted, the court may award to the prevailing party on the motion, reasonable expenses, including attorney's fees and costs incurred for the motion.
(3) On the court's initiative. On its own, the court may order an attorney, law firm, or party to show cause why conduct specifically described in the order has not violated Rule 11(b).
(4) Nature of the sanction. The sanction imposed under this rule may include an order to pay to the other party or parties the amount of the reasonable expenses incurred because of the filing of the pleading, motion, or other paper, including a reasonable attorney's fee. The sanction may also include nonmonetary directives.
(5) Vexatious litigant. In addition to any other sanction available under this rule, the court may also refer to the administrative district judge the question of whether to declare a person to be a vexatious litigant pursuant to Idaho Court Administrative Rule 59 and for relief under that rule.
(6) Requirements for an order. An order imposing a sanction must describe the sanctioned conduct and explain the basis for the sanction.
Amendment History
(Adopted March 1, 2016, effective July 1, 2016.)
Plain-English Summary
Every pleading, written motion, or other paper filed in a case needs a signature from a licensed attorney of record or, if the party has no lawyer, from the party personally. The signer also has to list an address, e-mail, and phone number. If a paper comes in unsigned, the court strikes it unless the problem gets fixed quickly once someone points it out.
Signing a paper is not just a formality. By signing, filing, or later standing behind a pleading or motion, the attorney or self-represented party is certifying that it was not filed to harass or run up costs, that the legal arguments have a genuine basis, and that the factual claims and denials are supported by evidence or a reasonable expectation of finding evidence. If that certification turns out to be false, Rule 11 lets the court impose sanctions, ranging from covering the other side's expenses to referring a repeat offender as a vexatious litigant. The rule spells out a notice-and-motion process for seeking sanctions, including a 21-day window to withdraw or correct the offending paper before a sanctions motion can be filed. Discovery papers are handled elsewhere and fall outside this rule.
Frequently Asked Questions
Who has to sign a pleading or motion under Rule 11?
An attorney of record licensed in Idaho signs on behalf of a represented party, in the attorney's own name. If a party has no lawyer, the party signs personally. Either way, the signature line must include an address, e-mail address, and phone number.
What am I certifying when I sign a pleading?
You are certifying that the paper is not being filed to harass anyone or drive up litigation costs, that its legal arguments are grounded in existing law or a good-faith argument to change the law, and that its factual assertions and denials have or will likely have evidentiary support.
Can I fix an unsigned paper instead of having it thrown out?
Yes. Rule 11 directs the court to strike an unsigned paper, but only if the missing signature is not promptly corrected once the attorney or party is notified of the omission.
How does someone ask for Rule 11 sanctions?
The request has to be its own separate motion, not folded into another motion, and it must describe the specific conduct that allegedly violates the rule. It must be served on the opposing side, and there is a 21-day safe harbor: if the challenged paper or position is withdrawn or corrected within that window, the motion cannot be filed with the court.
Does Rule 11 apply to discovery disputes?
No. The rule expressly excludes disclosures and discovery requests, responses, objections, and motions governed by Rules 26 through 37, which have their own certification and sanction provisions.
Source & verification. Rule text
are reproduced verbatim from the Idaho Rules of Civil Procedure, adopted by the
Supreme Court of Idaho. Last verified July 14, 2026. ·
Official source
Also known as: rule 11 sanctionssigning pleadings requirementfrivolous lawsuit sanctionsvexatious litigant Idahosafe harbor 21 daysattorney certification pleading