A Philippine Legal Article

I. Introduction

In the Philippines, an adultery case is a criminal case. It is not merely a private marital dispute, although it arises from the marital relationship. A person charged with adultery may face criminal prosecution, reputational harm, family consequences, employment consequences, immigration or travel complications, and related civil or domestic disputes.

At the preliminary investigation stage, the respondent is usually required to submit a counter-affidavit and supporting evidence. This document is extremely important because it is the respondent’s first formal opportunity to answer the complaint, deny the allegations, present defenses, submit documentary proof, identify witnesses, and ask the prosecutor to dismiss the case for lack of probable cause.

A counter-affidavit is not a casual explanation. It is a sworn legal document. It must be truthful, precise, organized, and supported by evidence. Poorly prepared counter-affidavits can damage the defense, create admissions, expose the respondent to perjury or falsification issues, or make it easier for the prosecution to find probable cause.

This article discusses how to prepare a counter-affidavit in an adultery case under Philippine law.

II. What Is Adultery Under Philippine Law?

Adultery is punished under the Revised Penal Code.

In general, adultery is committed by a married woman who has sexual intercourse with a man who is not her husband, and by the man who has carnal knowledge of her, knowing that she is married, even if the marriage is later declared void.

The crime has two accused in the usual case:

the married woman; and
the man who had sexual intercourse with her, if he knew she was married.

The offended party is the husband of the married woman.

This is different from concubinage, which is the offense commonly charged against a married man under different circumstances and with different legal elements.

III. Elements of Adultery

A counter-affidavit must address the elements of the offense. In an adultery case, the prosecution generally needs to show:

The woman was married at the time of the alleged acts;
She had sexual intercourse with a man not her husband;
The man knew that she was married, if the man is also charged; and
The complaint was filed by the offended spouse, generally the husband, and the legal requirements for prosecution were complied with.

Each act of sexual intercourse may constitute a separate count of adultery. Therefore, dates, places, and specific acts matter.

IV. Preliminary Investigation and the Role of the Counter-Affidavit

A counter-affidavit is usually submitted during preliminary investigation before the prosecutor.

The prosecutor does not decide guilt beyond reasonable doubt at this stage. The prosecutor determines whether there is probable cause to file an Information in court. Probable cause means there is enough basis to believe that a crime was committed and that the respondent is probably guilty of it.

The counter-affidavit should therefore focus on showing that probable cause is lacking because:

an element of adultery is absent;
the complaint is procedurally defective;
the evidence is hearsay, speculative, illegally obtained, unreliable, or insufficient;
the complainant has no legal personality to prosecute;
the complainant consented to or pardoned the alleged offense;
the allegation is physically, factually, or legally impossible;
the respondent is wrongly identified;
the dates or places alleged are false;
there is no proof of sexual intercourse;
the complaint was filed out of malice, retaliation, custody conflict, property conflict, or harassment.

V. Importance of Legal Counsel

A respondent should strongly consider engaging a lawyer before preparing or filing a counter-affidavit. Adultery cases involve criminal liability, marital status, evidence rules, and procedural requirements. A sworn statement may be used later in court.

A lawyer can help ensure that the counter-affidavit:

does not contain unnecessary admissions;
does not unintentionally confirm damaging facts;
preserves defenses;
raises procedural objections on time;
attaches proper evidence;
avoids inflammatory or irrelevant statements;
is consistent with possible trial strategy;
protects the respondent from perjury or self-incrimination issues.

VI. Deadline to File the Counter-Affidavit

The subpoena from the prosecutor usually states the deadline for submission of the counter-affidavit and supporting documents. The respondent must carefully read the subpoena and comply within the stated period.

Failure to file may result in the prosecutor resolving the complaint based only on the complainant’s evidence. A respondent who needs more time should file a proper motion for extension before the deadline, if allowed.

The counter-affidavit should not be filed late without explanation. Delay may prejudice the defense.

VII. First Step: Read the Complaint Carefully

Before drafting, the respondent should carefully review:

complaint-affidavit of the complainant;
affidavits of witnesses;
photographs;
screenshots;
chat messages;
hotel receipts;
condominium records;
barangay blotters;
police reports;
private investigator reports;
birth certificates;
marriage certificates;
documents showing alleged relationship;
any other attachments.

The defense should identify what the complainant actually claims, and what the evidence actually proves.

Common weaknesses include:

no specific date of sexual intercourse;
no specific place of sexual intercourse;
no proof that the accused were together privately;
no proof of sexual intercourse;
only rumors or hearsay;
only photographs showing friendship or companionship;
screenshots without authentication;
edited or incomplete conversations;
evidence obtained through hacking or unauthorized access;
assumptions based on jealousy;
allegations made by persons without personal knowledge;
inconsistent dates or impossible timelines.

VIII. Determine the Theory of Defense

A counter-affidavit should have a clear theory. It should not be a scattered denial.

Possible defense theories include:

No sexual intercourse occurred.
The complainant has no personal knowledge of the alleged acts.
The evidence only shows association, not adultery.
The accused were not together at the alleged time or place.
The alleged date is impossible because the respondent was elsewhere.
The woman was not legally married at the time.
The marriage was void or legally nonexistent, subject to the rule that adultery may still have complications where the marriage is later declared void.
The male respondent did not know the woman was married.
The husband consented to or pardoned the alleged offense.
The complaint was filed only after reconciliation, forgiveness, or condonation.
The case is retaliatory or malicious.
The evidence was fabricated, altered, or taken out of context.
The alleged acts are outside the prescriptive period.
The complaint violates procedural requirements.

The counter-affidavit should be built around the strongest available theory.

IX. Essential Parts of a Counter-Affidavit

A counter-affidavit in an adultery case usually contains the following:

caption;
title;
personal circumstances of the respondent;
statement that the affidavit is being submitted in response to the complaint;
admissions, if any, limited to harmless facts;
specific denials of material allegations;
affirmative defenses;
factual narrative;
discussion of complainant’s lack of evidence;
explanation of attached documents;
prayer for dismissal;
jurat;
signature of respondent;
notarization;
attachments and witness affidavits.

X. Caption

The caption should identify the office handling the preliminary investigation.

Example:

Republic of the Philippines Department of Justice Office of the City Prosecutor City of ________

[Name of Complainant], Complainant,

-versus-

[Name of Respondent/s], Respondent/s.

For: Adultery

The case number or NPS docket number should be included if available.

XI. Title

The document should be titled:

COUNTER-AFFIDAVIT

If there are several respondents, each respondent may submit a separate counter-affidavit, or they may submit separate affidavits with a common defense, depending on strategy.

It is often safer for each respondent to submit a separate sworn statement because their defenses may differ. For example, the married woman may deny sexual intercourse, while the male respondent may additionally deny knowledge of marriage.

XII. Personal Circumstances

The counter-affidavit should begin with the respondent’s personal details:

full name;
age;
civil status;
nationality;
residence address;
occupation;
government-issued ID details for notarization;
statement of competence to testify.

Example:

“I, Juan Dela Cruz, Filipino, of legal age, single, and residing at __________, after having been duly sworn, state as follows:”

The statement should be accurate. Do not misstate civil status, address, or identity.

XIII. Opening Statement

The counter-affidavit should state that the respondent is answering the complaint for adultery and denying the allegations.

Example:

“I submit this Counter-Affidavit in response to the Complaint-Affidavit filed by __________ charging me with adultery. I respectfully deny the accusation. The complaint is based on suspicion, conjecture, and unsupported conclusions, and it fails to establish probable cause.”

The opening should be firm but restrained. Avoid insults, threats, or emotional attacks.

XIV. Admissions and Denials

The respondent should decide carefully what to admit and what to deny.

Possible harmless admissions

Depending on the case, the respondent may admit:

identity;
residence;
employment;
acquaintance with another respondent;
existence of a workplace or social connection;
receipt of subpoena.

Dangerous admissions

The respondent should be very careful before admitting:

romantic relationship;
cohabitation;
overnight stays;
hotel meetings;
private travel;
sexually suggestive messages;
knowledge of marriage;
dates and places of meetings;
pregnancy or paternity;
forgiveness by complainant;
confrontation details.

A counter-affidavit should not volunteer unnecessary facts. Every admission should be reviewed for legal effect.

XV. Denying Sexual Intercourse

Because adultery requires sexual intercourse, a common defense is that the complaint fails to prove it.

The counter-affidavit may state:

the respondent did not have sexual intercourse with the co-respondent;
the complainant did not personally witness any act of intercourse;
the evidence does not prove sexual intercourse;
photographs, messages, or sightings do not establish the required act;
being friends, co-workers, companions, or acquaintances is not adultery;
suspicion is not probable cause.

However, the denial must be truthful. A false denial under oath may create additional legal risk.

XVI. Addressing Circumstantial Evidence

Adultery is often alleged through circumstantial evidence because direct proof is rare. The complainant may rely on messages, photographs, travel records, overnight stays, or conduct suggesting intimacy.

The counter-affidavit should address each item of evidence.

A. Photographs

The respondent may explain:

where the photo was taken;
who else was present;
why the parties were together;
whether the photo was cropped or misleading;
whether it proves only presence, not sexual intercourse.

B. Screenshots

The respondent may question:

authenticity;
completeness;
context;
source;
whether messages were edited;
whether the account actually belonged to the respondent;
whether the messages show sexual intercourse or only conversation;
whether they were obtained unlawfully.

C. Hotel or travel records

The respondent may explain:

the legitimate purpose of travel;
separate accommodations;
presence of other companions;
work-related reasons;
impossibility of the alleged act;
lack of proof that both parties occupied the same room;
absence of proof of sexual intercourse.

D. Birth of a child

If the complaint relies on pregnancy or childbirth, the defense becomes more sensitive. Paternity evidence may be relevant. The respondent should avoid unsupported claims and should seek legal advice before discussing paternity, DNA testing, or intimate facts.

XVII. Defense of Lack of Knowledge of Marriage

The male respondent may have a distinct defense: he did not know that the woman was married.

Adultery liability of the man requires that he knew the woman was married. Therefore, the counter-affidavit may state facts showing lack of knowledge, such as:

the woman represented herself as single, separated, annulled, widowed, or unmarried;
she did not use her married surname;
she did not wear a wedding ring;
she never introduced a husband;
her social media showed no marriage;
public records or common acquaintances did not disclose the marriage;
the respondent had no reason to know;
the complainant and woman were already living separately, if relevant.

This defense must be factual. A bare statement of “I did not know she was married” may be weak unless supported by surrounding circumstances.

XVIII. Defense Based on Consent or Pardon

Adultery is considered a private crime in the sense that prosecution generally requires a complaint by the offended spouse. The law also recognizes the significance of consent or pardon by the offended spouse.

The counter-affidavit may raise:

the complainant consented to the alleged relationship;
the complainant knowingly allowed or tolerated the relationship;
the complainant later forgave the alleged offense;
the complainant reconciled or resumed marital relations after knowing the facts;
the complaint was filed only after a later dispute;
the complainant is legally barred by his own conduct.

This defense requires careful handling. Alleging pardon or consent may imply that an act occurred. The wording must be precise. A respondent may argue in the alternative, but should avoid unnecessary admissions.

Example:

“Without admitting the alleged acts, the complaint is also defective because the complainant’s own conduct shows prior consent or, at the very least, subsequent pardon.”

Alternative defenses should be drafted with caution.

XIX. Requirement That Both Guilty Parties Be Included

In prosecutions for adultery, the offended spouse is generally required to include both guilty parties if both are alive. The reason is to prevent selective prosecution and misuse of the criminal process.

A counter-affidavit may challenge the complaint if:

only one alleged participant was charged despite the other being known and available;
the complainant selectively charged one person while excluding the other;
the omission violates the legal requirement for prosecution;
the complainant pardoned or protected one alleged participant.

This issue depends heavily on the facts and procedural posture.

XX. Prescription

Adultery cases are subject to prescriptive periods. The applicable prescriptive period depends on the penalty and relevant penal law rules.

A counter-affidavit may raise prescription if the complaint was filed too late. The respondent should examine:

date of the alleged act;
date of discovery by the offended spouse;
date of filing of the complaint;
whether multiple acts are alleged;
whether any alleged act remains within the prescriptive period;
whether prescription was interrupted.

If the complaint alleges old acts but gives no specific date, the counter-affidavit should point out the vagueness and inability to determine whether the case has prescribed.

XXI. Challenging the Complainant’s Personality to File

The offended party in adultery is generally the husband of the married woman. The counter-affidavit may question personality to file if:

the complainant is not legally married to the woman;
the marriage alleged by complainant is not proven;
the complainant lacks the required status;
the complaint was filed by a person not authorized by law;
the complaint lacks the required sworn statement;
the complainant did not include both alleged guilty parties where required.

However, this defense must be grounded in evidence. It is not enough to speculate.

XXII. Marriage Issues

The prosecution usually attaches a marriage certificate. The counter-affidavit should examine whether:

the marriage certificate is authentic;
the parties identified are the same persons involved;
the marriage existed at the time of the alleged act;
there was a prior judicial declaration of nullity;
the marriage record has defects;
the complainant and accused were legally married under Philippine law.

A warning is necessary: even where a marriage is later declared void, adultery law may still treat certain circumstances differently. The respondent should not casually rely on “void marriage” arguments without legal advice.

XXIII. Alibi or Physical Impossibility

If the respondent was elsewhere at the alleged time, alibi may be raised. The defense should be specific and supported by evidence.

Useful evidence may include:

time records;
employment logs;
travel records;
boarding passes;
immigration stamps;
CCTV records;
toll records;
GPS or ride-hailing records;
receipts;
photographs with metadata;
hospital records;
school or work attendance records;
witness affidavits.

A strong alibi shows not merely that the respondent was elsewhere, but that it was physically impossible or highly improbable for the alleged act to have occurred.

XXIV. Attacking Hearsay

Many adultery complaints are based on statements from neighbors, relatives, friends, or private investigators. The counter-affidavit should identify hearsay.

A witness affidavit is weak if the witness only says:

“I heard they were having an affair.”
“People in the barangay said they were lovers.”
“Someone told me they checked into a hotel.”
“I believe they had sexual relations.”
“They looked intimate.”

The counter-affidavit may state that such claims are hearsay, speculative, and insufficient to establish probable cause.

XXV. Illegally Obtained Evidence

Adultery complaints may rely on private messages, emails, photos, phone contents, location logs, or social media accounts obtained without consent.

The defense may challenge evidence obtained through:

hacking;
unauthorized access to email or social media;
secretly opening private messages;
taking screenshots from a locked phone;
installing spyware;
recording private communications without consent;
using stolen devices;
coercing passwords;
violating privacy laws.

The counter-affidavit may argue that the evidence is inadmissible, unreliable, incomplete, or unlawfully obtained. It may also reserve the right to file separate complaints for cybercrime, data privacy violations, or other offenses, depending on the facts.

XXVI. Digital Evidence and Authentication

If the complaint relies on screenshots, the counter-affidavit should examine whether the complainant established authenticity.

Potential objections include:

no proof who created the account;
no proof who sent the message;
no full conversation thread;
screenshots are cropped;
timestamps are missing;
metadata is absent;
messages could have been altered;
phone number ownership is not proven;
account was shared or hacked;
no chain of custody;
no affidavit from the person who captured the screenshots;
no explanation of how the evidence was obtained.

Screenshots may be persuasive if uncontested, so the respondent should specifically address them where possible.

XXVII. Avoiding Self-Incrimination

A counter-affidavit is voluntary in the sense that the respondent is given the opportunity to submit one, but it is also a sworn statement that may be used later. The respondent should not include statements that unnecessarily expose them to criminal liability.

For example, avoid:

admitting sexual intercourse unless strategically necessary and legally advised;
admitting knowledge of marriage if contestable;
admitting falsification of documents;
admitting threats or violence;
admitting hacking or unauthorized access;
admitting obstruction, bribery, or intimidation;
making accusations without evidence.

The affidavit should answer the complaint, not confess to other offenses.

XXVIII. Tone and Style

The counter-affidavit should be:

factual;
chronological;
respectful;
direct;
evidence-based;
free from insults;
free from irrelevant marital drama;
free from exaggerated statements;
clear enough for the prosecutor to follow.

Avoid statements like:

“The complainant is crazy.”
“Everyone knows he is a bad husband.”
“This case is nonsense.”
“They are just jealous.”
“I will sue everyone.”

Instead, use legal and factual language:

“The allegation is unsupported by personal knowledge.”
“The attached messages do not prove sexual intercourse.”
“The complainant’s timeline is impossible because I was abroad on the alleged date.”
“The complaint fails to establish an essential element of adultery.”

XXIX. Organizing the Facts

A useful structure is:

background facts;
relationship between the parties;
response to each allegation;
affirmative defenses;
discussion of evidence;
conclusion and prayer.

For example:

A. Background

Explain who the respondent is and how the respondent knows the co-respondent, if at all.

B. Specific denials

Address each allegation by date, place, and event.

C. Evidence

Refer to attached documents and witness affidavits.

D. Legal defects

Explain why the complaint fails to establish probable cause.

E. Prayer

Ask for dismissal.

XXX. Supporting Affidavits

A counter-affidavit may be supported by affidavits of witnesses. These may include:

co-workers;
relatives;
friends;
hotel or building personnel, where appropriate;
persons present during alleged meetings;
persons who can confirm the respondent was elsewhere;
persons who can authenticate documents;
persons who can explain context for photographs or messages.

Witness affidavits should be based on personal knowledge. Avoid affidavits filled with opinions, gossip, or character attacks.

XXXI. Documentary Evidence

Useful documentary evidence may include:

marriage certificate or proof disputing marriage;
birth certificate;
employment records;
attendance records;
travel records;
boarding passes;
passport stamps;
hotel records;
receipts;
CCTV certification;
screenshots with full context;
phone records;
barangay records;
court records;
prior complaints;
messages showing complainant’s consent or pardon;
messages showing no romantic or sexual relationship;
documents proving the male respondent did not know of the marriage;
proof of separation, if relevant;
affidavits from persons with personal knowledge.

Each attachment should be labeled clearly, such as:

Annex “A” – Copy of passport pages showing respondent was abroad;
Annex “B” – Certificate of Employment;
Annex “C” – Affidavit of Maria Santos;
Annex “D” – Full conversation thread dated ________;
Annex “E” – Copy of complainant’s message dated ________ showing prior knowledge.

XXXII. How to Refer to Attachments

The affidavit should refer to attachments in the body.

Example:

“On 15 March 2024, I was in Singapore for work and could not have been at the alleged location in Quezon City. Attached as Annex ‘A’ is a copy of my passport page showing my departure from the Philippines on 10 March 2024 and return on 20 March 2024. Attached as Annex ‘B’ is my airline itinerary.”

Do not attach documents without explaining their relevance.

XXXIII. Responding to a Complaint Based on Messages

If the complaint relies on romantic or sexual messages, possible responses include:

the messages are fabricated;
the messages are incomplete;
the messages are jokes or taken out of context;
the messages do not prove sexual intercourse;
the account was not controlled by the respondent;
the phone was accessed unlawfully;
the messages were sent after the relevant date;
the complainant omitted messages showing innocent context.

However, if messages are genuine and damaging, the affidavit must be drafted carefully. A blanket denial may be risky if the messages can be authenticated later.

XXXIV. Responding to a Complaint Based on Hotel Evidence

If hotel records are alleged, the counter-affidavit may address:

whether the respondent actually checked in;
whether both parties were present;
whether the record identifies the parties;
whether another person used the respondent’s name;
whether the visit was for a legitimate purpose;
whether there were other companions;
whether the room was actually occupied;
whether sexual intercourse is merely assumed.

The defense should avoid implausible explanations. Prosecutors can detect evasive or artificial narratives.

XXXV. Responding to a Complaint Based on “Caught in the Act” Allegations

If the complainant claims to have caught the respondents together, the affidavit must address:

where exactly the parties were found;
what they were doing;
who was present;
whether they were clothed;
whether the complainant personally saw sexual intercourse;
whether police or barangay officials were called;
whether a blotter was made;
whether photographs or videos exist;
whether the incident was staged, misinterpreted, or exaggerated.

Being found together is not automatically proof of adultery, but compromising circumstances may create probable cause if not adequately explained.

XXXVI. Responding to Pregnancy or DNA Allegations

If the complainant alleges that pregnancy or a child proves adultery, legal counsel is especially important. The counter-affidavit may need to address:

dates of conception;
access by the husband;
medical records;
paternity presumptions;
DNA testing issues;
privacy of the child;
admissibility of evidence;
whether the alleged father is actually proven.

The respondent should not make reckless statements about the child’s legitimacy or paternity. Such statements can affect the child and other legal proceedings.

XXXVII. Prayer for Dismissal

The counter-affidavit should end with a clear request.

Example:

“WHEREFORE, premises considered, I respectfully pray that the complaint for adultery be dismissed for lack of probable cause. I further pray for such other reliefs as are just and equitable.”

The prayer should be concise.

XXXVIII. Jurat and Notarization

The counter-affidavit must be signed and sworn before an authorized officer, usually a notary public or prosecutor authorized to administer oaths.

The jurat typically states that the affiant personally appeared, was identified through competent evidence of identity, and swore to the truth of the affidavit.

An unsigned or unnotarized counter-affidavit may be treated as defective.

XXXIX. Verification of Truth

Because the counter-affidavit is sworn, the respondent must ensure every statement is true based on personal knowledge or supported by documents.

Avoid:

exaggerations;
invented alibis;
fake screenshots;
altered documents;
false witness affidavits;
forged signatures;
notarization without personal appearance;
backdated documents.

These can lead to criminal liability and destroy credibility.

XL. Sample Counter-Affidavit Format

Below is a general format. It must be adapted to the facts of the case.

Republic of the Philippines Department of Justice Office of the City Prosecutor City of __________

[NAME OF COMPLAINANT], Complainant,

-versus-

[NAME OF RESPONDENT], Respondent.

NPS Docket No.: __________ For: Adultery

COUNTER-AFFIDAVIT

I, [Name of Respondent], Filipino, of legal age, [civil status], residing at [address], after having been duly sworn, state:

I am the respondent in the above-captioned complaint for adultery.
I respectfully deny the accusation against me. The complaint is based on suspicion, unsupported conclusions, and evidence that does not establish the elements of adultery.
I know [name of co-respondent] because [briefly explain relationship, if appropriate, such as co-worker, acquaintance, business contact, etc.].
I specifically deny that I had sexual intercourse with [name] on [date], at [place], or at any other time alleged in the complaint.
The complainant did not personally witness any act of sexual intercourse. His allegation is based only on [screenshots/photos/rumors/suspicions], which do not prove adultery.
The photograph attached to the complaint as Annex “__” merely shows [explanation]. It does not show any sexual act or any circumstance proving sexual intercourse.
The screenshots attached to the complaint are incomplete and taken out of context. They do not prove the commission of adultery. In any event, I reserve the right to question their authenticity, source, completeness, and admissibility.
On [date alleged by complainant], I was at [place], as shown by [document], attached as Annex “A.” It was therefore impossible for me to have committed the act alleged.
[If male respondent and applicable:] I did not know that [name of woman] was married. She represented herself to me as [single/separated/annulled/etc.], and I had no reason to believe otherwise. Attached as Annex “B” are [documents/messages] showing such representation.
[If applicable, carefully worded:] Without admitting the alleged acts, the complaint is also defective because the complainant’s conduct shows consent, tolerance, or pardon. [State facts and attach proof.]
The complaint fails to establish probable cause because an essential element of adultery is absent. At most, the evidence shows [friendship/communication/association], which is not the same as proof of sexual intercourse.
I am executing this Counter-Affidavit to attest to the truth of the foregoing and to respectfully request the dismissal of the complaint.

WHEREFORE, I respectfully pray that the complaint for adultery be dismissed for lack of probable cause.

IN WITNESS WHEREOF, I have signed this Counter-Affidavit this ___ day of __________ 20__, in __________, Philippines.

[Signature] [Name of Respondent] Affiant

SUBSCRIBED AND SWORN to before me this ___ day of __________ 20__, affiant exhibiting to me competent evidence of identity: [ID details].

Notary Public / Prosecutor Administering Oath

XLI. Sample Supporting Witness Affidavit

A supporting witness affidavit may look like this:

AFFIDAVIT

I, [Name], Filipino, of legal age, residing at [address], after having been duly sworn, state:

I know respondent [name] because [relationship].
On [date], I was with respondent at [place] from [time] to [time].
During that period, respondent could not have been at [place alleged in complaint].
Attached as Annex “A” is [document/photo/record] supporting my statement.
I am executing this affidavit to attest to the truth of the foregoing.

[Signature]

Witness affidavits should be factual and based on personal knowledge.

XLII. Common Mistakes in Counter-Affidavits

Avoid these mistakes:

filing without reading all complaint attachments;
submitting a general denial only;
failing to address specific dates and evidence;
admitting a romantic or sexual relationship unnecessarily;
attacking the complainant’s character instead of the evidence;
failing to attach supporting documents;
attaching documents without explanation;
using fake or altered documents;
submitting affidavits from witnesses with no personal knowledge;
ignoring prescription;
ignoring consent or pardon issues;
ignoring the male respondent’s knowledge defense;
failing to question digital evidence;
filing late;
submitting an unnotarized affidavit;
copying a template without adapting facts;
making statements inconsistent with future court defenses.

XLIII. Strategic Considerations

A counter-affidavit should not reveal every possible defense if doing so unnecessarily helps the complainant repair weaknesses. However, it must provide enough facts and evidence to persuade the prosecutor that probable cause is lacking.

The defense should consider:

whether to submit a detailed denial or a limited procedural challenge;
whether to attach sensitive documents;
whether to challenge digital evidence immediately;
whether to raise consent or pardon without implying admission;
whether to file countercharges for harassment, unjust vexation, violence, cybercrime, data privacy violations, or falsification, where appropriate;
whether there are related cases involving custody, support, violence against women, property, or annulment;
whether settlement discussions are legally and ethically appropriate.

Because adultery is a criminal matter, strategy should be coordinated with counsel.

XLIV. Possible Counterclaims or Related Remedies

Depending on the facts, the respondent may have remedies against the complainant or others, such as:

complaint for cybercrime-related offenses if accounts were hacked;
data privacy complaint for unauthorized disclosure or processing of personal information;
complaint for grave coercion or threats;
complaint for unjust vexation or harassment;
civil action for damages;
complaint for falsification if documents were fabricated;
administrative complaint if public officers abused authority;
protective remedies if violence, stalking, or intimidation is involved.

These should not be filed impulsively. Weak countercharges may appear retaliatory.

XLV. What Happens After Filing the Counter-Affidavit?

After the respondent files a counter-affidavit, the prosecutor may:

require the complainant to submit a reply-affidavit;
allow the respondent to submit a rejoinder, if permitted;
conduct clarificatory hearing, in some cases;
resolve the complaint;
dismiss the complaint for lack of probable cause;
file an Information in court if probable cause is found.

If the complaint is dismissed, the complainant may seek reconsideration or review, depending on procedure. If an Information is filed in court, the respondent becomes an accused and must address arraignment, bail where applicable, pre-trial, and trial.

XLVI. If the Prosecutor Finds Probable Cause

If the prosecutor finds probable cause, the respondent may consider remedies such as:

motion for reconsideration before the prosecutor, if procedurally available;
petition for review with the Department of Justice, where applicable;
motion to quash in court, if there are legal grounds;
judicial remedies for grave abuse of discretion in exceptional cases;
trial defenses.

The best remedy depends on the stage of the case and the grounds available.

XLVII. Ethical and Practical Considerations

Adultery cases are emotionally charged. The respondent should avoid:

contacting or threatening the complainant;
pressuring witnesses;
deleting evidence;
fabricating documents;
posting about the case on social media;
humiliating the complainant or co-respondent online;
violating privacy laws;
discussing legal strategy through unsecured channels;
ignoring subpoenas;
assuming the case will disappear.

Everything said or done after receiving the complaint can become evidence.

XLVIII. Checklist for Preparing the Counter-Affidavit

Before filing, check the following:

Have you read the complaint and all attachments?
Do you know the exact allegations by date and place?
Have you identified the elements of adultery being alleged?
Is there proof of marriage?
Is there proof of sexual intercourse?
Is the complainant the proper offended spouse?
Were both alleged guilty parties included?
Is prescription an issue?
Is there evidence of consent or pardon?
Does the male respondent have a lack-of-knowledge defense?
Are screenshots authentic and complete?
Were private messages lawfully obtained?
Do you have alibi or impossibility evidence?
Are your witness affidavits based on personal knowledge?
Are all annexes labeled?
Is the affidavit notarized?
Was it filed on time?
Did you keep receiving copies and proof of filing?

XLIX. Conclusion

Preparing a counter-affidavit in a Philippine adultery case requires more than denying the accusation. The respondent must address the legal elements of adultery, the sufficiency of the complainant’s evidence, the credibility of witnesses, procedural requirements, possible defenses such as lack of sexual intercourse, lack of knowledge of marriage, consent, pardon, prescription, and defects in digital or circumstantial evidence.

The strongest counter-affidavits are factual, specific, organized, and supported by documents and witness affidavits. They avoid emotional attacks and unnecessary admissions. They focus on why the prosecutor should find no probable cause.

Because a counter-affidavit is sworn and may shape the entire criminal defense, it should be prepared carefully, preferably with the assistance of counsel. In adultery cases, one careless sentence can become an admission, while one well-supported fact can be enough to prevent the filing of a criminal case.