Filing a frivolous lawsuit in California carries real penalties: court-ordered fines paid to the court, mandatory or discretionary awards of the other side’s attorney fees, dismissal of the case or striking of the offending pleading, a possible vexatious litigant designation that blocks future self-represented filings, exposure to a malicious prosecution suit by the target, and, for attorneys, State Bar discipline. How severe the consequences get depends on which statute the court uses, whether the filing touched protected speech, and whether the person has done it before.
When a Lawsuit Counts as Frivolous
California Code of Civil Procedure Section 128.5 defines “frivolous” as “totally and completely without merit or for the sole purpose of harassing an opposing party.”1California Legislative Information. California Code CCP 128.5 The California Supreme Court in In re Marriage of Flaherty set the benchmark that still governs: a filing is frivolous “only when it is prosecuted for an improper motive — to harass the respondent or delay the effect of an adverse judgment — or when it indisputably has no merit — when any reasonable attorney would agree that the appeal is totally and completely without merit.”2Justia. In re Marriage of Flaherty
The “any reasonable attorney” phrase matters. A weak case, a long-shot theory, or a creative legal argument is not frivolous. Only claims with no arguable basis, or claims filed to harass or delay, meet the definition. That threshold shapes every penalty discussed below.
Monetary Fines Paid to the Court
Under CCP 128.7, a court can order a party or attorney to pay a penalty directly to the court. The statute caps any sanction at “what is sufficient to deter repetition of this conduct or comparable conduct by others similarly situated.”3California Legislative Information. California Code CCP 128.7 That deterrence standard gives judges wide discretion. A few hundred dollars may be enough to discipline a careless solo practitioner; a pattern of meritless motions from a well-resourced firm can justify substantially more.
CCP 128.7 sanctions the objective unreasonableness of a filing. Every time an attorney or self-represented party signs and submits a document, they certify that they conducted a reasonable inquiry and that the claims are supported by existing law or a good-faith argument to change it, and that the factual allegations have evidentiary support or are likely to after investigation.3California Legislative Information. California Code CCP 128.7 The court doesn’t need to find bad faith. It just needs to find that the filing was objectively unreasonable.
Paying the Other Side’s Attorney Fees
Fee-shifting is usually the most expensive part of a sanctions order. Both sanctions statutes authorize it.
CCP 128.5 lets a court order payment of the “reasonable expenses, including attorney’s fees” incurred as a result of the frivolous conduct.1California Legislative Information. California Code CCP 128.5 This statute requires bad faith in addition to frivolousness — the filer must have known, or should have known, the claim lacked merit and pressed on anyway. It’s harder to invoke than 128.7, but it directly targets deliberate misuse of the courts.
CCP 128.7 authorizes fee awards to the party bringing the sanctions motion when “warranted for effective deterrence.”3California Legislative Information. California Code CCP 128.7 Defending even a straightforward meritless motion can cost tens of thousands of dollars, and a filer who loses on sanctions may end up covering every billable hour of that defense.
Losing the Case Itself
Financial penalties are not the only tool. CCP 128.7 explicitly authorizes “directives of a nonmonetary nature.”3California Legislative Information. California Code CCP 128.7 In practice, that means a court can strike the offending pleading or dismiss the action entirely. A frivolous complaint that survives a demurrer might still be thrown out on a sanctions motion, ending the case before discovery even begins.
Mandatory Attorney Fees Under the Anti-SLAPP Statute
When a frivolous lawsuit targets someone’s constitutionally protected speech or petitioning activity, a separate and especially punishing consequence applies. Code of Civil Procedure Section 425.16, the anti-SLAPP statute, lets the defendant file a special motion to strike. If the defendant shows the lawsuit arises from protected activity and the plaintiff cannot demonstrate a probability of prevailing, the case is dismissed.4California Legislative Information. California Code CCP 425-16
The financial consequence is automatic. A prevailing defendant on an anti-SLAPP motion is entitled to recover attorney fees and costs. The statute uses “shall,” which courts read as mandatory: the judge has no discretion to deny fees, only to decide the reasonable amount.4California Legislative Information. California Code CCP 425-16 Someone who sues a critic, a journalist, a community activist, or a witness and loses an anti-SLAPP motion will be paying the other side’s lawyer.
Being Declared a Vexatious Litigant
For people who make frivolous filing a habit, California has one of the harshest civil consequences in American law: the vexatious litigant designation. Under CCP Section 391, a person can qualify in several ways, including:
- Starting at least five lawsuits as a self-represented party in the previous seven years that were decided against them or left inactive without going to trial for two years or more.
- Repeatedly trying to relitigate cases that have already been finally decided against them.
- Repeatedly filing meritless motions, pursuing unnecessary discovery, or using other delay tactics while self-represented.
- Already having been declared a vexatious litigant by any state or federal court based on similar facts.
The most serious restriction that follows is a prefiling order. A court can prohibit the vexatious litigant from filing any new lawsuit in California as a self-represented party without first getting permission from the presiding judge of the court where they want to file.6California Legislative Information. California Code CCP 391-7 The judge grants permission only if the proposed case appears to have merit and isn’t intended to harass or delay. Violating a prefiling order can be punished as contempt.
A court can also require a vexatious litigant to post a security bond for the defendant’s benefit. If the court finds no reasonable probability the litigant will prevail, it sets the bond amount, and the case cannot proceed until the money is posted.7California Legislative Information. California Code CCP 391-3 The Judicial Council keeps a public list of individuals subject to prefiling orders, and court clerks statewide must check it before accepting filings.
Being Sued for Malicious Prosecution
Sanctions punish the filer and can partially reimburse the target, but they rarely cover the full damage a frivolous case causes. The target has a separate remedy: a malicious prosecution lawsuit for damages.
A malicious prosecution plaintiff must prove three things: the original lawsuit was brought by or at the direction of the defendant and ended in the plaintiff’s favor; it was brought without probable cause; and the defendant acted with malice.8Justia. CACI No 1501 Wrongful Use of Civil Proceedings
The California Supreme Court in Sheldon Appel Co. v. Albert & Oliker held that probable cause is an objective question for the judge. The court asks whether, on the facts known to the defendant, the original lawsuit was “legally tenable.”9Justia Law. Sheldon Appel Co v Albert and Oliker If the underlying case had any reasonable legal basis, the malicious prosecution claim fails, regardless of the attorney’s actual state of mind. If it was objectively untenable, the attorney’s sincere belief in it doesn’t save them.
Two practical points limit these claims. First, you can’t bring one until the underlying case has ended in your favor on the merits. A voluntary dismissal under ambiguous circumstances may not qualify. Second, if the original plaintiff won on even one of their claims, the favorable termination requirement is not satisfied.
State Bar Discipline for Attorneys
For lawyers, the consequences of a frivolous filing can outlast the case. The State Bar can investigate attorneys who repeatedly file baseless actions, and a pattern of sanctions may lead to discipline ranging from a formal reprimand to suspension of the attorney’s license. A single sanctions order is embarrassing; a documented history of them is a career problem.
The 21-Day Safe Harbor
Sanctions under either CCP 128.5 or CCP 128.7 aren’t automatic. Both statutes include a 21-day safe harbor. The party seeking sanctions must first serve the motion on the other side, and the motion cannot be filed with the court if the challenged filing is withdrawn or corrected within 21 days.1California Legislative Information. California Code CCP 128.53California Legislative Information. California Code CCP 128.7 Someone who receives a sanctions motion and pulls the offending pleading within that window avoids the penalty entirely. Someone who ignores the warning and keeps the filing in place forfeits that protection.