What Is California Code of Civil Procedure § 431.30?

California Code of Civil Procedure Section 431.30 is the statute that tells a defendant what has to go inside an answer to a civil complaint. It controls two things: how you deny the plaintiff’s allegations, and how you plead any affirmative defenses. The core rule is simple to state and easy to get wrong. If the complaint is unverified (or the case is a limited civil action under California’s economic litigation procedures), you may answer with a general denial. If the complaint is verified, you must deny the allegations specifically, paragraph by paragraph.¹

What Section 431.30 Covers

The statute governs the content of the answer itself. It does not set your deadline (that comes from the summons and Section 412.20, which gives you 30 days after service) and it does not describe alternatives to answering such as demurrers or motions to strike. It tells you, once you have decided to file an answer, what that answer must look like to be legally sufficient.²

Two kinds of content belong in the answer under 431.30: denials of the complaint’s material allegations, and any new matter constituting a defense. Each has its own rules.

When a General Denial Is Allowed

Under Section 431.30(d), a general denial is sufficient only when the complaint is unverified or when the case falls under California’s economic litigation procedures for limited civil cases.¹ An unverified complaint is one the plaintiff did not sign under oath. Most California complaints are unverified, which is why general denials show up so often.

A general denial contests every material allegation in a single sweeping statement. It takes little time to draft and forces the plaintiff to prove every element of every cause of action. One limit worth understanding: the denial only puts the complaint’s material allegations in issue. Procedural facts like jurisdiction are not treated as material in this context, so a general denial does not automatically challenge everything on the page.

When Specific Denials Are Required

If the plaintiff verified the complaint by signing it under oath, a general denial will not do. You have to deny each allegation specifically, either positively or on information and belief, and your answer itself must be verified to match.³

The consequences of ignoring this rule are harsh. Any allegation you fail to deny is taken as true for purposes of the case.⁴ A self-represented defendant who answers a verified complaint with a single general denial, or who files an unverified answer, can effectively concede the plaintiff’s case without ever reaching trial.

The Forms a Specific Denial Can Take

Section 431.30(f) gives you several ways to respond to individual allegations. You can deny particular paragraphs by number. You can admit some allegations and generally deny the rest. You can deny based on a lack of information or belief sufficient to answer.¹

The information-and-belief denial is useful when the plaintiff alleges facts you genuinely cannot confirm or deny, such as details about their own medical treatment or internal records you have never seen. You state that you lack enough information to respond, and the court treats that as a denial. It is honest, permissible, and avoids the risk of making a flat denial that later turns out to be wrong.

Beyond compliance, specific denials carry a strategic benefit. Admitting the parts of the complaint that are genuinely undisputed (dates, the existence of a contract, the identity of the parties) and denying only what matters narrows the issues for trial and signals that you are engaging seriously with the case.

Affirmative Defenses as New Matter

Section 431.30 also requires that any affirmative defense be pleaded in the answer as “new matter constituting a defense.”¹ A defense is different from a denial. A denial says “that did not happen.” An affirmative defense says “even if it did happen, there is a legal reason I am not liable.” Each defense should be separately stated and tied to the cause of action it addresses.

The California Courts list defenses that commonly appear in civil answers:⁵

Statute of limitations: the plaintiff waited too long to file.
Failure to state a cause of action: even taking the complaint as true, the facts do not add up to a valid legal claim.
Lack of standing: the person suing was not the one actually harmed.
Res judicata: a court already decided this same dispute between the same parties.
Laches: the plaintiff’s unreasonable delay in filing prejudiced your ability to defend.
Failure to mitigate damages: the plaintiff could have reduced losses by reasonable steps and chose not to.
Offset: the plaintiff owes you money or failed to credit a payment you made.

If you omit an affirmative defense from your answer, you generally waive it. There is one procedural convenience built into California practice: once you plead new matter, the law automatically treats the plaintiff as having denied it, so the plaintiff does not file a separate response to your defenses.⁴

What Happens When the Answer Does Not Comply

Two separate risks follow a defective answer. The first is the admissions problem already described: allegations you fail to deny properly are deemed true.⁴ The second is more structural. If the answer is improper enough to be struck under Section 436 and you do not file a corrected version in the time the court allows, you are treated as if you never answered at all, which opens the door to a default judgment.⁶

Default itself is a steep consequence. Once the clerk enters your default, you lose the ability to participate in the case. In a straightforward contract or debt action for a sum certain, the clerk can enter judgment immediately for the full amount demanded plus interest and costs. In other cases, the plaintiff proves up damages before a judge, and you are not there to contest the evidence.⁷

How 431.30 Fits With Your Response Deadline

Section 431.30 tells you what belongs in the answer. Section 412.20 and the summons tell you when it is due: 30 days after service.² The parties can agree to a single 15-day extension without court approval; anything longer needs a judge’s permission.

Before you draft, check the first page of the complaint for a verification. That one detail decides whether a general denial is enough or whether you must go through the complaint paragraph by paragraph and verify your answer. Then list every affirmative defense that applies and plead it as new matter. An answer that handles both pieces correctly is what Section 431.30 requires. Anything less puts the case at risk before the facts are ever heard.

1
California Legislative Information. California Code of Civil Procedure CCP 431.30
2
California Legislative Information. California Code of Civil Procedure CCP 412.20
3
California Legislative Information. California Code of Civil Procedure CCP 446
4
California Legislative Information. California Code of Civil Procedure 431.20
5
California Courts | Self Help Guide. Using Affirmative Defenses If You’re Sued
6
California Legislative Information. California Code of Civil Procedure 436
7
California Legislative Information. California Code of Civil Procedure 585