SUBJECT: The Rule on ‘The Answer’ and the Effects of Failure to Plead Defenses

I. Introduction

This memorandum exhaustively examines the rule governing the Answer in Philippine civil procedure and the consequential effects of failing to plead defenses. The Answer is the responsive pleading wherein a defendant admits or denies the material allegations of the complaint and sets forth their affirmative defenses and compulsory counterclaims. The failure to plead certain defenses within this pleading can result in their waiver, making this rule a cornerstone of the adversarial system and the principle of procedural due process. This analysis will cover the governing rules, requisite contents, specific timing, and the critical distinction between waivable and non-waivable defenses.

II. Governing Rules and Definition of the Answer

The primary rule governing the Answer is found in the 1997 Rules of Civil Procedure, specifically Rules 6, 9, and 11. An Answer is a pleading that serves as the defendant’s opportunity to contest the claims asserted against them. It performs three essential functions: (1) it specifically denies the material allegations in the complaint the truth of which the defendant does not admit, (2) it sets forth affirmative defenses, and (3) it states any compulsory counterclaims the defendant may have against the plaintiff. The filing of an Answer prevents the plaintiff from obtaining a default judgment and moves the case towards the pre-trial and trial stages.

III. Contents of the Answer

The Answer must contain the following:

Specific denial: Allegations not specifically denied are deemed admitted. A specific denial requires the defendant to specify each material allegation of fact the truth of which they do not admit and, whenever practicable, to set forth the substance of the matters upon which they rely for such denial. A general denial, or a denial for lack of knowledge or information sufficient to form a belief, is treated as an admission unless it relates to a fact that is plainly and necessarily within the defendant’s knowledge.

Affirmative defenses: These are allegations of new matters which, while hypothetically admitting the material allegations of the complaint, would nevertheless prevent or bar recovery. They include facts like prescription, res judicata, statute of frauds, illegality of the cause of action, and lack of jurisdiction over the subject matter (though this last is a special defense).

Counterclaims: These are any claims which the defendant may have against the plaintiff. They are classified as either compulsory (arising out of or connected with the same transaction or occurrence as the plaintiff’s claim) or permissive (not so arising). Compulsory counterclaims not asserted in the Answer are barred.

Cross-claim: If applicable, a claim against a co-party.

IV. Period to File an Answer

The reglementary period to file an Answer is typically fifteen (15) days from service of the summons, unless a different period is fixed by the court or by the rules (e.g., in cases against an overseas absentee defendant). This period may be extended by a motion for extension of time to file a responsive pleading, filed before the expiration of the original period, and granted upon valid grounds. Failure to file an Answer within the allowed period may result in the defendant being declared in default.

V. The Concept of Waiver of Defenses under Rule 9

Rule 9, Section 1 of the Rules of Civil Procedure is pivotal: “Defenses and objections not pleaded either in a motion to dismiss or in the Answer are deemed waived. However, when it appears from the pleadings or the evidence on record that the court has no jurisdiction over the subject matter, that there is another action pending between the same parties for the same cause, or that the action is barred by a prior judgment or by statute of limitations, the court shall dismiss the claim.”
This rule underscores the mandatory nature of pleading defenses. The only exceptions to this waiver are the defenses of (a) lack of jurisdiction over the subject matter, (b) litis pendentia, (c) res judicata, and (d) prescription. These may be asserted at any time, even on appeal or after a judgment on the merits, as they are not waivable.

VI. Effects of Failure to Plead Defenses

Waiver: The general effect of failing to plead a defense (affirmative or otherwise) in either a motion to dismiss or the Answer is that it is deemed irrevocably waived. The defendant cannot raise it in a subsequent pleading, a motion for judgment on the pleadings, at pre-trial, or during trial. For example, failure to plead the defense of lack of capacity to sue or the statute of frauds results in waiver.

Default: If a defendant fails to file an Answer within the prescribed period, they may be declared in default. Upon motion of the plaintiff and proof of such failure, the court may render a judgment by default. The defendant in default is entitled to notice of subsequent proceedings but loses the right to present evidence, participate in the trial, or object to the plaintiff’s evidence, except to object to the jurisdiction over the subject matter.

Judgment on the Pleadings: Under Rule 34, if an Answer fails to tender an issue or admits the material allegations of the complaint, the plaintiff may move for a judgment on the pleadings. This is proper when the Answer does not raise a genuine issue of fact because defenses were not properly pleaded or were insufficient in law.

VII. Comparative Analysis: Waivable vs. Non-Waivable Defenses

The following table delineates the key defenses and their susceptibility to waiver, based on Rule 9, Section 1 and jurisprudence.

Defense	Nature (Waivable / Non-Waivable)	When It May Be Raised	Rationale / Basis
Lack of jurisdiction over the subject matter	Non-Waivable	At any time, even for the first time on appeal or after a judgment on the merits.	Jurisdiction is conferred by law and cannot be conferred by the parties’ acquiescence. It is a matter of public policy.
Litis pendentia	Non-Waivable	At any time, during trial or on appeal.	To prevent multiplicity of suits and conflicting judgments. Considered by the court motu proprio.
Res judicata	Non-Waivable	At any time, during trial or on appeal.	For the stability of judgments and to prevent endless litigation. Considered by the court motu proprio.
Prescription	Non-Waivable	At any time before a judgment on the merits, even on appeal.	Although waivable in a strict sense, the rules treat it as non-waivable if apparent from the pleadings. The court may dismiss the claim sua sponte.
Lack of jurisdiction over the person of the defendant	Waivable	Must be raised in a motion to dismiss or, if no such motion is filed, in the Answer. Otherwise, it is waived.	Acquired through voluntary appearance or proper service of summons. A general appearance waives this defense.
Improper venue	Waivable	Must be raised in a motion to dismiss or, if no such motion is filed, in the Answer. Otherwise, it is waived.	Deemed a personal privilege which the defendant may waive.
Lack of capacity to sue	Waivable	Must be set forth as an affirmative defense in the Answer.	Considered a defect in the party’s legal personality to institute the suit, which is waivable if not timely pleaded.
Statute of Frauds	Waivable	Must be set forth as an affirmative defense in the Answer.	The defense is personal to the party and intended to prevent fraud, not to encourage it. It is not a rule of jurisdiction.
Illegality of the cause of action	Waivable	Must be set forth as an affirmative defense in the Answer.	While involving public interest, it is generally treated as an affirmative defense that must be pleaded.
Failure to state a cause of action	Waivable	Must be raised in a motion to dismiss or, if no such motion is filed, in the Answer. Otherwise, it is waived.	This defense tests the sufficiency of the complaint on its face. If not timely challenged, the defect is cured.

VIII. Exceptions and Related Doctrines

Liberal Construction for Lack of Jurisdiction over the Subject Matter: Courts may consider this defense sua sponte at any stage. A judgment rendered by a court without jurisdiction over the subject matter is void.

Prescription as Apparent from the Pleadings: While prescription is generally an affirmative defense that must be pleaded, if the complaint itself shows that the action has prescribed, the court may dismiss it on that ground, as it is deemed incorporated in the motion to dismiss or Answer by implication.

Amendment to Conform to Evidence: Under Rule 10, Section 5, issues not raised in the pleadings may be tried by express or implied consent of the parties. They shall be treated in all respects as if they had been raised in the pleadings. However, this applies to issues, not to defenses that are deemed waived under Rule 9.

Rule on Default and Relief Therefrom: A defendant declared in default may file a verified motion under oath to set aside the order of default upon showing of (a) fraud, accident, mistake, or excusable negligence, and (b) a meritorious defense. This is a limited opportunity to cure the failure to plead.

IX. Practical Implications and Strategic Considerations

Meticulous Drafting: Counsel must meticulously review the complaint and ensure all available defenses, especially waivable ones, are properly and specifically pleaded in the Answer or a prior motion to dismiss.

Choice between Motion to Dismiss and Answer: Certain defenses (e.g., lack of jurisdiction over the person, improper venue, failure to state a cause of action) can be raised in a motion to dismiss before filing an Answer. This can terminate the case early but risks waiver if the motion is denied and the defense is not subsequently pleaded in the Answer.

Pre-trial and the Pre-trial Order: Under the rule of pre-trial, defenses and claims not included in the pre-trial order are generally deemed waived. Therefore, all defenses from the Answer must be carried over and specified in the pre-trial brief and order.

X. Conclusion

The rule on the Answer and the waiver of defenses is a critical procedural mechanism designed to enforce order, clarity, and fairness in litigation. It compels parties to lay all cards on the table at the earliest opportunity, preventing trial by ambush. The distinction between waivable and non-waivable defenses is paramount. Defenses such as lack of jurisdiction over the subject matter, litis pendentia, res judicata, and prescription enjoy a unique status and can be raised at any time. All other defenses, including but not limited to lack of jurisdiction over the person, improper venue, and substantive affirmative defenses, are irretrievably lost if not pleaded in a motion to dismiss or the Answer. Failure to comply with this rule can lead to waiver, default, or an adverse judgment on the pleadings, thereby potentially deciding the case on procedural rather than substantive grounds.