I. Introduction
In the Philippines, a criminal complaint may begin before the police, the National Bureau of Investigation, the prosecutor’s office, or another law enforcement or regulatory agency with investigative authority. When the National Bureau of Investigation becomes involved, one of the most common documents a person may receive is an NBI subpoena requiring appearance, submission of documents, or participation in an investigation.
An NBI subpoena is often issued during the fact-finding or complaint-building stage. It may be sent to a complainant, respondent, witness, company officer, platform representative, records custodian, bank officer, employer, internet service provider, or any person believed to have relevant information. The subpoena may require a person to appear at a specific NBI office, give a statement, submit documents, explain a transaction, or respond to allegations.
Affidavits are equally important. Philippine criminal complaints are generally built on sworn written statements, including the complaint-affidavit, counter-affidavit, witness affidavits, reply-affidavit, and supporting documents. These affidavits form the factual foundation for law enforcement evaluation, prosecutor review, preliminary investigation, and possible filing of criminal information in court.
This article discusses the legal and practical aspects of NBI subpoenas and affidavit requirements in Philippine criminal complaints, including the role of the NBI, what a subpoena means, how to respond, what affidavits should contain, common mistakes, rights of complainants and respondents, documentary evidence, notarization, deadlines, non-appearance, and the transition from NBI investigation to prosecution.
II. The Role of the NBI in Criminal Complaints
The National Bureau of Investigation is a national investigative agency under the Department of Justice. It investigates crimes, gathers evidence, assists in law enforcement, conducts forensic examinations, receives complaints, and prepares cases for possible prosecution.
The NBI may handle many kinds of cases, including:
- Cybercrime.
- Estafa and fraud.
- Identity theft.
- Falsification.
- Libel and cyberlibel.
- Threats and harassment.
- Human trafficking.
- Illegal recruitment.
- Investment scams.
- Online scams.
- Data breaches.
- Public corruption.
- Serious physical crimes.
- Financial crimes.
- Intellectual property violations.
- Document fraud.
- Cases referred by the Department of Justice or other agencies.
The NBI does not usually decide guilt or innocence. Its role is investigative. If the NBI finds sufficient basis, the matter may be referred to the prosecutor’s office for preliminary investigation or inquest, depending on the circumstances.
III. What Is an NBI Subpoena?
An NBI subpoena is a written directive issued by the NBI requiring a person to appear, provide information, produce documents, or otherwise participate in an investigation.
It may be addressed to:
- A complainant.
- A respondent.
- A witness.
- A corporate officer.
- A records custodian.
- An employer.
- A bank.
- A telecommunications provider.
- A government office.
- A digital platform representative.
- Any person believed to possess relevant information.
An NBI subpoena usually states:
- The name of the person summoned.
- The NBI office or division handling the matter.
- The date, time, and place of appearance.
- The name of the complainant or subject matter, if disclosed.
- The nature of the complaint or investigation, if stated.
- The investigator or agent assigned.
- Documents or items required to be brought.
- Warning regarding failure to appear, if included.
- Contact details or reference number, if provided.
Receiving an NBI subpoena does not automatically mean that a criminal case has already been filed in court. It often means that the NBI is investigating a complaint or gathering evidence.
IV. Types of Subpoena in Criminal Investigation
1. Subpoena Ad Testificandum
This requires a person to appear and testify or give a statement. In NBI practice, this may mean appearing before an investigator for questioning, clarification, or affidavit-taking.
2. Subpoena Duces Tecum
This requires a person to produce documents, records, objects, electronic files, or other evidence. It may require the production of contracts, receipts, bank records, screenshots, emails, employment records, corporate documents, identification documents, or transaction records.
3. Combined Subpoena
A subpoena may require both personal appearance and production of documents.
4. Invitation Letter Versus Subpoena
Sometimes a person receives a letter or notice inviting them to appear. This may be less formal than a subpoena, but it should still be taken seriously. A formal subpoena usually carries stronger legal significance and may contain specific warnings.
V. Is an NBI Subpoena the Same as a Court Subpoena?
No. An NBI subpoena is issued in connection with an investigation. A court subpoena is issued in a judicial proceeding. A prosecutor may also issue subpoenas during preliminary investigation.
The differences matter:
| Matter |
NBI Subpoena |
Prosecutor’s Subpoena |
Court Subpoena |
| Issuing authority |
NBI |
Prosecutor’s office |
Court |
| Stage |
Investigation or complaint-building |
Preliminary investigation |
Court case |
| Purpose |
Gather facts and evidence |
Determine probable cause |
Require testimony or evidence at trial/hearing |
| Result |
Possible referral to prosecutor |
Dismissal or filing in court |
Evidence presentation in pending case |
A person who receives any of these should respond carefully, but the rights, consequences, deadlines, and strategy may differ.
VI. Does Receiving an NBI Subpoena Mean You Are Already Charged?
Not necessarily. A subpoena may be issued because:
- You are a complainant.
- You are a witness.
- You are a respondent.
- Your name appears in documents.
- You control relevant records.
- You are an officer of a company involved.
- You are a custodian of electronic evidence.
- The NBI wants clarification.
- The NBI is verifying a complaint before referral.
However, if the subpoena identifies you as a respondent or asks you to explain allegations, you should treat the matter seriously and seek legal advice before giving statements.
VII. What Should a Person Do Upon Receiving an NBI Subpoena?
A person who receives an NBI subpoena should take the following steps:
Read the subpoena carefully. Check the date, time, office, assigned agent, case reference, and documents required.
Confirm authenticity. If there is doubt, verify directly with the NBI office using official contact channels.
Identify your role. Determine whether you are being summoned as complainant, respondent, witness, records custodian, or representative.
Preserve evidence. Do not delete messages, emails, files, posts, documents, devices, or transaction records.
Consult counsel. This is especially important if you are a respondent or if your statement may expose you to liability.
Prepare documents. Bring only relevant documents and keep copies.
Avoid informal admissions. Anything said may influence the investigation.
Ask for time if needed. If you need more time to secure counsel or documents, a written request for resetting may be appropriate.
Appear respectfully and on time. Non-appearance can escalate the matter.
Document your compliance. Keep copies of submissions, receiving stamps, emails, and acknowledgment receipts.
VIII. Rights of a Person Summoned by the NBI
A person summoned by the NBI has rights, especially if they may be treated as a suspect or respondent.
These include:
- Right to counsel.
- Right to remain silent when answers may incriminate them.
- Right against self-incrimination.
- Right to due process.
- Right to be informed of the nature of the allegations, where applicable.
- Right not to be compelled to sign a statement they do not understand or agree with.
- Right to read documents before signing.
- Right to request copies of documents submitted or signed.
- Right to refuse unlawful searches or seizures.
- Right to request reasonable time to consult counsel.
- Right to submit a written statement instead of making careless oral explanations, depending on the situation.
A person should never sign an affidavit, sworn statement, acknowledgment, waiver, or confession without reading and understanding it fully.
IX. Can a Lawyer Attend the NBI Hearing or Appearance?
Yes. A person summoned by the NBI may appear with a lawyer. This is especially advisable if the person is a respondent, possible suspect, company officer, or holder of sensitive documents.
Counsel may help by:
- Clarifying the purpose of the subpoena.
- Advising whether to answer questions.
- Preventing self-incrimination.
- Reviewing affidavits before signing.
- Requesting copies.
- Asking for time to submit documents.
- Ensuring the record is accurate.
- Preparing a counter-affidavit or position paper.
- Coordinating with the investigator.
Having a lawyer does not imply guilt. It is a protective step.
X. Can a Person Ignore an NBI Subpoena?
Ignoring an NBI subpoena is risky. It may result in:
- The investigation proceeding without your side.
- Adverse inference by the complainant or investigator.
- Issuance of another subpoena.
- Referral to the prosecutor based only on available evidence.
- Possible contempt-related or obstruction-related issues depending on circumstances.
- Loss of opportunity to clarify facts early.
- Escalation of the complaint.
If attendance is impossible, the better approach is usually to send a written explanation, request resetting, or appear through counsel where allowed.
XI. Valid Reasons to Request Postponement or Resetting
A summoned person may request a new date for valid reasons, such as:
- Need to secure counsel.
- Medical emergency.
- Prior court hearing.
- Travel abroad or out of town.
- Late receipt of subpoena.
- Need to gather voluminous documents.
- Need to obtain corporate authorization.
- Need for translation or authentication of documents.
- Conflict with work obligations.
- Lack of clarity regarding required documents.
The request should be made promptly, in writing, and with supporting proof if available. Silence is worse than a timely request.
XII. NBI Investigation Versus Preliminary Investigation
An NBI investigation is usually a fact-finding process. A preliminary investigation is a proceeding before the prosecutor to determine whether probable cause exists to file a criminal case in court.
NBI Investigation
The NBI may:
- Receive complaints.
- Interview witnesses.
- Issue subpoenas.
- Collect documents.
- Conduct forensic examinations.
- Coordinate with cybercrime units.
- Prepare reports.
- Refer cases to prosecutors.
Preliminary Investigation
The prosecutor may:
- Require complaint-affidavits.
- Issue subpoenas to respondents.
- Require counter-affidavits.
- Evaluate evidence.
- Determine probable cause.
- Dismiss the complaint or file information in court.
The NBI may assist in preparing the case, but the prosecutor generally decides whether the evidence supports filing a criminal case.
XIII. What Is an Affidavit in a Criminal Complaint?
An affidavit is a written statement of facts sworn under oath before a notary public, prosecutor, consular officer, or other authorized officer.
In criminal complaints, affidavits are used because the preliminary investigation process is largely document-based. The prosecutor often relies on affidavits and supporting evidence rather than live testimony at the initial stage.
Common affidavits include:
- Complaint-affidavit.
- Witness affidavit.
- Counter-affidavit.
- Reply-affidavit.
- Rejoinder-affidavit.
- Supplemental affidavit.
- Affidavit of desistance.
- Affidavit of loss.
- Affidavit of authenticity.
- Affidavit of service.
- Affidavit of arrest, in certain cases.
- Joint affidavit.
XIV. Complaint-Affidavit
A complaint-affidavit is the sworn statement of the complainant describing the alleged crime and supporting facts.
It should answer:
- Who committed the act?
- What exactly happened?
- When did it happen?
- Where did it happen?
- How was it committed?
- Why is it criminal?
- What evidence supports the accusation?
- Who witnessed it?
- What damage or injury resulted?
The complaint-affidavit should be factual, chronological, specific, and supported by evidence.
Essential Contents
A complaint-affidavit should usually contain:
- Name, age, citizenship, civil status, address, and contact details of the complainant.
- Identity of the respondent.
- Relationship between the parties.
- Clear narration of facts.
- Specific acts attributed to each respondent.
- Dates, places, amounts, documents, communications, and witnesses.
- Explanation of how the elements of the crime are present.
- List and description of supporting documents.
- Statement that the affidavit is made to charge the respondent with a specific offense.
- Jurat or oath before an authorized officer.
- Signature of the affiant.
- Competent evidence of identity.
XV. Witness Affidavit
A witness affidavit is a sworn statement from a person who personally knows relevant facts.
It should state:
- How the witness knows the parties.
- What the witness personally saw, heard, received, or did.
- The date, time, and place of the relevant events.
- Documents or messages the witness can authenticate.
- How the witness can identify the respondent or complainant.
- That the statement is based on personal knowledge.
A witness affidavit should avoid hearsay. Statements such as “I heard from another person that…” are usually weak unless offered for a specific legal purpose.
XVI. Counter-Affidavit
A counter-affidavit is the respondent’s sworn answer to the complaint.
It may:
- Deny the allegations.
- Admit some facts but explain them.
- Present defenses.
- Attach supporting documents.
- Show lack of probable cause.
- Challenge the elements of the offense.
- Argue prescription, venue, jurisdiction, or insufficiency of evidence.
- Present witnesses.
- Explain why the complaint is malicious, false, exaggerated, or civil in nature.
A counter-affidavit is critical because failure to submit one may result in the prosecutor resolving the case based only on the complainant’s evidence.
XVII. Reply-Affidavit and Rejoinder-Affidavit
A reply-affidavit responds to the respondent’s counter-affidavit. A rejoinder-affidavit responds to the reply-affidavit.
These are not always required or allowed, depending on the prosecutor or investigating authority. They should be concise and limited to new matters, clarifications, or rebuttal evidence.
XVIII. Supplemental Affidavit
A supplemental affidavit may be submitted when additional facts, documents, witnesses, or clarifications become available after the original affidavit.
It should not contradict the original affidavit unless there is a clear explanation. Contradictions can damage credibility.
XIX. Affidavit of Desistance
An affidavit of desistance is a sworn statement by a complainant expressing lack of interest in pursuing the case or stating that they are withdrawing the complaint.
However, in criminal cases, the offense is generally against the State. An affidavit of desistance does not automatically dismiss the case. The prosecutor or court may still proceed if there is sufficient evidence.
Affidavits of desistance are treated cautiously because they may be affected by pressure, settlement, fear, or compromise.
XX. Affidavit Requirements in NBI Proceedings
During NBI investigation, the investigator may require:
- Complaint-affidavit.
- Witness affidavits.
- Sworn statement.
- Verification affidavit.
- Affidavit authenticating screenshots.
- Affidavit explaining documents.
- Supplemental affidavit.
- Counter-statement from the respondent.
- Corporate representative affidavit.
- Records custodian affidavit.
The NBI may help reduce statements into affidavit form, but the affiant should carefully review the final document before signing.
Before Signing an NBI-Prepared Affidavit
The affiant should verify:
- Every statement is accurate.
- Dates and names are correct.
- Legal conclusions do not distort facts.
- No facts were added without consent.
- No important facts were omitted.
- The affiant understands the language used.
- Attachments are correctly marked.
- The oath is properly administered.
- The affiant has a copy.
XXI. Format of an Affidavit
A criminal complaint affidavit usually follows this structure:
- Caption or title.
- Personal circumstances of the affiant.
- Statement of capacity or personal knowledge.
- Chronological narration of facts.
- Identification of respondent.
- Description of offense.
- Identification of evidence and annexes.
- Statement of damage or injury.
- Prayer or request for filing of charges.
- Oath clause.
- Signature.
- Jurat.
- Notarial details.
- Competent evidence of identity.
XXII. Personal Knowledge Requirement
Affidavits should be based on personal knowledge. This means the affiant should state only facts personally observed, experienced, received, created, or verified.
Weak affidavit language includes:
- “I was told that…”
- “People say that…”
- “I believe he is guilty…”
- “It seems obvious that…”
- “Someone informed me but I cannot remember who…”
- “I assume that…”
Stronger affidavit language includes:
- “I personally saw…”
- “I received the message on…”
- “I paid the amount through…”
- “Attached is a copy of the receipt…”
- “I heard respondent say…”
- “I took the screenshot on…”
- “I was present when…”
XXIII. Specificity Requirement
Affidavits should be specific. General accusations are weak.
Weak Statement
“Respondent scammed me many times and caused me damage.”
Stronger Statement
“On 15 March 2026, respondent told me through Messenger that she could process my employment documents for Canada if I paid ₱80,000. On 16 March 2026, I transferred ₱50,000 to her GCash account ending in 1234. A copy of the transfer receipt is attached as Annex ‘A.’ After receiving the money, respondent blocked me and did not provide any receipt, contract, or application status.”
Specific facts help investigators and prosecutors determine whether the legal elements of an offense are present.
XXIV. Documentary Evidence Attached to Affidavits
Affidavits should attach relevant documents. These may include:
- Contracts.
- Receipts.
- Bank transfer records.
- GCash or Maya transaction records.
- Screenshots.
- Emails.
- Text messages.
- Chat logs.
- Photographs.
- Videos.
- Medical certificates.
- Barangay blotters.
- Police reports.
- Demand letters.
- Corporate records.
- IDs.
- CCTV footage.
- Employment documents.
- Official certifications.
- Expert reports.
- NBI cybercrime reports.
- Device extraction reports.
Each attachment should be marked as an annex and referred to in the affidavit.
XXV. How to Mark Annexes
Documents are commonly marked as:
- Annex “A”
- Annex “B”
- Annex “C”
- Annex “A-1”
- Annex “A-2”
- Annex “B-1”
The affidavit should clearly describe each annex.
Example:
“Attached as Annex ‘A’ is a screenshot of respondent’s Facebook post dated 10 April 2026. Attached as Annex ‘B’ is the Messenger conversation where respondent admitted receiving the amount of ₱50,000. Attached as Annex ‘C’ is the bank transfer receipt dated 16 March 2026.”
Proper annexing helps the investigator and prosecutor follow the evidence.
XXVI. Notarization and Oath
An affidavit must be sworn before an authorized officer. In the Philippines, this is commonly done before a notary public or prosecutor.
The affiant must personally appear and present competent evidence of identity. The notary or officer verifies identity and administers the oath.
A notarized affidavit becomes a public document, but notarization does not automatically prove that the statements are true. It only confirms that the affiant swore to the statement before an authorized officer.
False statements in an affidavit may expose the affiant to perjury or other liability.
XXVII. Affidavits Executed Abroad
If the complainant, respondent, or witness is abroad, the affidavit may need to be:
- Notarized before a Philippine Embassy or Consulate.
- Apostilled in a country that is part of the Apostille Convention.
- Consularized or authenticated, where required.
- Accompanied by certified translation if not in English or Filipino.
For OFWs, foreign residents, foreign witnesses, and overseas corporate officers, authentication requirements should be checked before submission.
An affidavit executed abroad without proper authentication may be challenged or rejected.
XXVIII. Language of Affidavits
Affidavits may be in English or Filipino. They may also include statements in local languages where appropriate.
The affiant should understand the language used. If the affiant is not fluent in the language of the affidavit, a translation or interpreter’s certification may be necessary.
A person should not sign an affidavit written in legal English if they do not understand it. They should ask for an explanation or translation.
XXIX. Electronic Evidence in NBI Complaints
Many NBI complaints involve electronic evidence. This is common in cybercrime, online scams, libel, threats, identity theft, hacking, and digital fraud.
Electronic evidence may include:
- Screenshots.
- URLs.
- Social media posts.
- Emails.
- IP logs.
- Chat messages.
- Digital receipts.
- Online marketplace listings.
- Device contents.
- Metadata.
- Videos.
- Audio recordings.
- Cloud files.
- Platform records.
- Transaction histories.
- Login records.
The affidavit should explain how the electronic evidence was obtained, when it was captured, who captured it, and why it is authentic.
XXX. Screenshots as Evidence
Screenshots are commonly used but may be challenged. To strengthen screenshots:
- Capture the full screen, including URL, date, profile name, and context.
- Take multiple screenshots showing the sequence of messages.
- Use screen recording to show navigation to the post or conversation.
- Save the original files.
- Avoid editing, cropping, filtering, or annotating the original evidence.
- Record the date, time, and timezone.
- Identify the device used.
- Ask witnesses to execute affidavits.
- Preserve the original account or device.
- Submit printed and digital copies where required.
A screenshot should be supported by an affidavit of the person who captured or received it.
XXXI. Chain of Custody
For physical or digital evidence, chain of custody may matter. Chain of custody refers to the documentation of who collected, handled, stored, transferred, examined, and submitted evidence.
This is especially important for:
- Drugs.
- Weapons.
- Devices.
- Hard drives.
- Phones.
- CCTV files.
- Original documents.
- Forensic images.
- Digital extractions.
- Audio or video recordings.
Weak chain of custody may allow a respondent to question authenticity, tampering, or reliability.
XXXII. Sworn Statement Versus Affidavit
In practice, a sworn statement taken by an investigator may function like an affidavit if it is signed under oath. However, a formal affidavit prepared by counsel may be more organized and strategic.
A sworn statement may be question-and-answer style. A complaint-affidavit is usually narrative style. Both can be used, but clarity and accuracy are crucial.
XXXIII. Position Paper
Sometimes a person may submit a position paper to explain legal arguments along with affidavits and documents. A position paper is not a substitute for sworn factual statements unless it is verified or supported by affidavits.
A position paper may discuss:
- Elements of the offense.
- Probable cause.
- Defenses.
- Lack of jurisdiction.
- Lack of evidence.
- Prescription.
- Civil nature of the dispute.
- Privileged communication.
- Good faith.
- Documentary inconsistencies.
XXXIV. Complaint-Affidavit Versus Police Blotter
A police blotter is not the same as a complaint-affidavit. A blotter is a record of a report made to law enforcement. It may support a complaint but usually does not by itself establish the full elements of a crime.
A complaint-affidavit should still be prepared if the matter will be pursued criminally.
XXXV. NBI Clearance Hit Versus NBI Subpoena
An NBI clearance “hit” is different from an NBI subpoena.
A “hit” during NBI clearance processing may mean that the applicant’s name matches or resembles a name in a record. It does not always mean there is a pending criminal case.
An NBI subpoena, on the other hand, is a directive to appear or produce information in an investigation.
The two should not be confused.
XXXVI. Corporate Respondents and Company Officers
If a subpoena is addressed to a company or corporate officer, special preparation is needed.
A company should determine:
- Who is authorized to appear.
- Whether a board resolution or secretary’s certificate is needed.
- What records are requested.
- Whether the records contain confidential or personal data.
- Whether the company is a complainant, respondent, witness, or records custodian.
- Whether counsel should attend.
- Whether documents should be certified true copies.
- Whether privileged communications are involved.
- Whether disclosure may violate privacy or contractual obligations.
Company officers should avoid making personal admissions beyond their authority.
XXXVII. Bank, Telecom, Employer, and Platform Records
The NBI may seek records from institutions. However, special laws may protect certain records.
Examples include:
- Bank secrecy rules.
- Data privacy rules.
- Telecommunications privacy.
- Employment confidentiality.
- Corporate confidentiality.
- Attorney-client privilege.
- Trade secrets.
- Platform terms and legal process requirements.
A subpoena for sensitive records should be reviewed carefully. The recipient may need to comply, object, request clarification, or require a court order depending on the nature of the records.
XXXVIII. Data Privacy Considerations
Submitting documents to the NBI may involve personal information. A party should submit only relevant personal data and avoid unnecessary disclosure.
For example, when submitting screenshots or records, consider whether unrelated personal details should be redacted, subject to investigator acceptance.
However, a person should not alter evidence in a way that misleads the investigator. Redactions should be identified and explained.
XXXIX. Privileged Communications
Certain communications may be protected from disclosure, including attorney-client communications and legal advice. If an NBI subpoena requests privileged materials, counsel should be consulted before producing them.
Privilege may also arise in official proceedings, settlement communications, or confidential professional relationships, depending on the facts.
XL. Perjury Risks in Affidavits
Affidavits are sworn statements. A person who knowingly makes false statements under oath may face perjury or other criminal liability.
Perjury risk arises when a person:
- Lies about material facts.
- Fabricates documents.
- Alters screenshots.
- Falsely identifies a respondent.
- Conceals payments.
- Invents witnesses.
- Misstates dates.
- Signs an affidavit they did not read.
- Swears to facts outside personal knowledge as if personally known.
- Submits forged documents.
A person should correct mistakes promptly and avoid exaggeration.
XLI. False Complaints and Malicious Prosecution
Filing a false criminal complaint may expose the complainant to counterclaims or criminal liability.
Possible consequences include:
- Perjury.
- Unjust vexation.
- Malicious prosecution.
- Damages.
- Counter-affidavit allegations.
- Administrative complaints.
- Loss of credibility.
- Dismissal of complaint.
- Possible prosecution if evidence was fabricated.
A complainant should file only when there is a good-faith factual and legal basis.
XLII. Self-Incrimination and the Counter-Affidavit
A respondent has the right against self-incrimination. However, in preliminary investigation, failure to submit a counter-affidavit may allow the prosecutor to resolve based on the complaint.
The respondent must balance:
- Right to remain silent.
- Need to rebut allegations.
- Risk of admissions.
- Availability of documentary defenses.
- Possibility of settlement.
- Exposure to related offenses.
A carefully drafted counter-affidavit can deny or explain allegations without unnecessary admissions.
XLIII. Should a Respondent Give an Oral Explanation at the NBI?
A respondent should be cautious. Oral explanations may be misunderstood, summarized inaccurately, or used against the respondent.
A safer approach may be:
- Appear with counsel.
- Ask for a copy of the complaint or allegations.
- Request time to submit a written counter-affidavit.
- Avoid signing an incomplete statement.
- Do not speculate.
- Do not answer questions without understanding them.
- Do not provide passwords or devices without legal advice.
- Do not consent to searches without understanding the consequences.
XLIV. Search, Seizure, and Devices
In cybercrime and fraud investigations, the NBI may be interested in phones, laptops, hard drives, SIM cards, or online accounts.
A subpoena is not necessarily the same as a search warrant. A person should distinguish between:
- Voluntary submission of documents.
- Voluntary surrender of device.
- Request for inspection.
- Search warrant issued by a court.
- Warrantless search exceptions.
- Consent search.
Before surrendering a device or giving passwords, legal advice is strongly recommended. Devices may contain private, privileged, unrelated, or sensitive information.
XLV. Deadlines for Submission
The subpoena may state a date for appearance or submission. In preliminary investigation, the prosecutor may provide a period for filing counter-affidavits. NBI deadlines may be more flexible during investigation, but non-compliance can still have consequences.
If more time is needed, request an extension promptly and explain why.
XLVI. Service of NBI Subpoena
An NBI subpoena may be served personally, by mail, courier, email, or through other means depending on practice and circumstances.
A person should record:
- Date and time received.
- Manner of service.
- Person who received it.
- Documents attached.
- Deadline stated.
- Contact details of investigator.
Late receipt may be a valid reason to request resetting.
XLVII. If the Person Is Abroad
If the person summoned is abroad, practical issues arise.
Possible steps include:
- Informing the investigator in writing.
- Providing proof of overseas residence or travel.
- Asking whether appearance through counsel is acceptable.
- Requesting remote participation if allowed.
- Submitting a consularized or apostilled affidavit.
- Authorizing a lawyer or representative.
- Coordinating submission of documents electronically and by courier.
- Monitoring whether the matter is later referred to a prosecutor.
Being abroad does not make the subpoena irrelevant, especially if the person plans to return to the Philippines or if the complaint may proceed to court.
XLVIII. If the Subpoena Is Vague
Some subpoenas provide limited details. If the subpoena does not clearly state the allegations or documents required, a recipient may ask for clarification.
A written clarification request may ask:
- What is the nature of the complaint?
- Am I summoned as respondent, witness, or complainant?
- What documents are required?
- May I obtain a copy of the complaint?
- May I appear through counsel?
- May I request resetting to prepare?
However, the request should be respectful and should not appear evasive.
XLIX. If the Subpoena Is Fake or Suspicious
Fake subpoenas or scam notices may exist. Warning signs include:
- Demand for payment to “settle” immediately.
- Threats of arrest unless money is sent.
- Unofficial email addresses.
- Poor formatting.
- No case reference or office.
- Refusal to allow verification.
- Instructions to send money to a personal account.
- Suspicious links or attachments.
- Pressure to communicate only through private messaging apps.
Verify directly with the NBI office before sending money, personal data, passwords, or documents.
L. Arrest and NBI Subpoena
A subpoena is not the same as a warrant of arrest. Receiving a subpoena does not automatically mean the person will be arrested upon appearance.
However, if there is an existing warrant, separate legal consequences may apply. A person who fears arrest should verify case status through counsel.
In cases involving warrantless arrest, inquest, or ongoing operations, the situation is different from ordinary subpoena compliance.
LI. Inquest Versus Preliminary Investigation
If a person is arrested without warrant under circumstances allowed by law, the case may proceed through inquest. In that situation, affidavits may include arrest affidavits, complaint-affidavits, witness affidavits, and other urgent documents.
If there is no warrantless arrest, the case usually proceeds through regular preliminary investigation when the offense requires it.
The NBI may be involved in either scenario.
LII. Probable Cause
The purpose of the complaint-building and preliminary investigation process is to determine whether there is probable cause.
Probable cause does not require proof beyond reasonable doubt. It means there are facts and circumstances sufficient to engender a well-founded belief that a crime has been committed and that the respondent is probably guilty.
Affidavits and evidence should therefore focus on the elements of the offense and the respondent’s participation.
LIII. Burden of Proof at Different Stages
Different stages require different levels of proof.
| Stage |
Standard or Focus |
| NBI investigation |
Is there enough basis to investigate or refer? |
| Preliminary investigation |
Is there probable cause? |
| Trial |
Proof beyond reasonable doubt |
| Civil damages |
Preponderance of evidence |
A complaint may survive investigation but still fail at trial. Conversely, a complaint may be dismissed early if affidavits are vague, unsupported, or legally insufficient.
LIV. Common Affidavit Mistakes by Complainants
Complainants often weaken their case by:
- Using general accusations.
- Failing to identify exact dates.
- Failing to attach proof.
- Not explaining the respondent’s participation.
- Submitting hearsay.
- Omitting important documents.
- Exaggerating damages.
- Mislabeling a civil dispute as a crime without showing criminal intent.
- Failing to authenticate screenshots.
- Submitting cropped or edited evidence.
- Failing to identify witnesses.
- Using emotional language instead of facts.
- Filing in the wrong office.
- Waiting too long.
- Not signing or notarizing properly.
LV. Common Affidavit Mistakes by Respondents
Respondents often make mistakes such as:
- Ignoring the subpoena.
- Submitting bare denials.
- Making unnecessary admissions.
- Attacking the complainant personally instead of addressing elements.
- Failing to attach documents.
- Contradicting prior messages.
- Submitting fake evidence.
- Failing to raise prescription or venue issues.
- Failing to challenge authenticity.
- Signing a statement without reading it.
- Giving oral explanations without counsel.
- Deleting relevant evidence.
- Contacting the complainant in a threatening way.
- Missing deadlines.
- Assuming the case is not serious because it is “only at the NBI.”
LVI. Special Considerations by Type of Offense
Estafa
Affidavits should show deceit, damage, reliance, transaction details, and intent. Attach receipts, messages, contracts, and payment records.
Cyberlibel
Affidavits should show defamatory statement, publication, identification, malice, screenshots, URLs, witnesses, and damage.
Threats
Affidavits should quote the exact threat, explain context, identify the recipient, attach messages or recordings, and show fear or seriousness.
Falsification
Affidavits should identify the false document, false entry, author, use, damage, and comparison documents.
Illegal Recruitment
Affidavits should show recruitment acts, lack of authority, payments, promises of deployment, documents, witnesses, and agency involvement.
Online Scam
Affidavits should show identity of account, transaction flow, misrepresentation, payment, failure to deliver, and digital evidence.
Identity Theft
Affidavits should show unauthorized use of personal information, account records, screenshots, damage, and links to respondent.
Data Privacy-Related Complaints
Affidavits should show personal data involved, unauthorized processing or disclosure, harm, and evidence of publication or misuse.
LVII. Role of the Prosecutor After NBI Referral
If the NBI believes a complaint has basis, it may refer the case to the prosecutor. The prosecutor may then conduct preliminary investigation.
The prosecutor is not bound to adopt the NBI’s recommendation. The prosecutor independently evaluates whether probable cause exists.
The prosecutor may:
- Dismiss the complaint.
- Require additional evidence.
- Conduct clarificatory hearings.
- File an information in court.
- Recommend further investigation.
- Include or exclude respondents.
- Modify the offense charged.
LVIII. What Happens If Probable Cause Is Found?
If probable cause is found, the prosecutor files an information in court. The case then becomes a criminal court case.
The court may:
- Evaluate probable cause.
- Issue a warrant or summons.
- Require arraignment.
- Set pre-trial.
- Proceed to trial.
- Decide guilt or innocence.
At trial, affidavits alone may not be enough. Witnesses may need to testify and be cross-examined.
LIX. What Happens If the Complaint Is Dismissed?
If the complaint is dismissed, the complainant may have remedies, such as:
- Motion for reconsideration.
- Petition for review with the Department of Justice, where applicable.
- Filing a new complaint if dismissal was without prejudice and additional evidence exists.
- Civil action, if appropriate.
- Administrative complaint, if applicable.
A dismissal at the prosecutor level does not always mean the incident never happened; it may mean probable cause was not sufficiently shown.
LX. Practical Checklist for a Complainant Preparing for NBI Filing
A complainant should prepare:
- Valid ID.
- Chronology of events.
- Names and addresses of respondents.
- Complaint-affidavit.
- Witness affidavits.
- Supporting documents.
- Screenshots and URLs.
- Receipts and transaction records.
- Demand letters, if any.
- Proof of damage.
- Contact details of witnesses.
- Copies for NBI, prosecutor, respondents, and personal file.
- Digital backup of evidence.
- Certification or authentication for electronic evidence, where available.
LXI. Practical Checklist for a Respondent Who Received an NBI Subpoena
A respondent should prepare:
- Copy of subpoena.
- Timeline of events.
- Copy of complaint, if available.
- Relevant communications.
- Contracts, receipts, and records.
- Evidence of payment, delivery, performance, or good faith.
- Witness affidavits.
- Valid ID.
- Counsel authorization, if appearing through lawyer.
- Written request for resetting, if needed.
- Counter-affidavit or position paper, if appropriate.
- Proof of inability to attend, if applicable.
LXII. How to Draft a Strong Complaint-Affidavit
A strong complaint-affidavit should:
- Be chronological.
- Use clear dates and places.
- Identify each respondent’s specific act.
- Attach proof for every major claim.
- Avoid speculation.
- Explain why the act is criminal.
- Identify witnesses.
- Explain damages.
- Authenticate documents.
- Be truthful and consistent.
The affidavit should not merely say that a crime was committed. It should narrate facts showing the elements of the crime.
LXIII. How to Draft a Strong Counter-Affidavit
A strong counter-affidavit should:
- Respond point by point.
- Avoid emotional attacks.
- Attach documents.
- Explain context.
- Challenge missing elements.
- Raise procedural defenses.
- Deny false allegations specifically.
- Admit only what is true and harmless.
- Preserve the right against self-incrimination.
- Be consistent with existing records.
Bare denial is usually weak. Documentary evidence is often decisive.
LXIV. Sample Structure of a Complaint-Affidavit
A complaint-affidavit may follow this structure:
- Personal circumstances of complainant.
- Identification of respondent.
- Background of relationship.
- First relevant event.
- Subsequent events in order.
- Specific unlawful act.
- Evidence supporting each act.
- Damage suffered.
- Witnesses.
- Request for investigation and filing of charges.
- Oath and signature.
LXV. Sample Structure of a Counter-Affidavit
A counter-affidavit may follow this structure:
- Personal circumstances of respondent.
- General denial only if supported by specific facts.
- Admissions of undisputed facts.
- Specific responses to allegations.
- Documentary evidence.
- Legal defenses.
- Explanation of good faith.
- Challenge to probable cause.
- Request for dismissal.
- Oath and signature.
LXVI. Should Evidence Be Submitted in Original or Copies?
Usually, copies are submitted while originals are preserved for verification. However, the NBI or prosecutor may require originals for inspection.
Best practice:
- Submit clear photocopies or printouts.
- Bring originals for comparison.
- Keep original receipts and documents safe.
- Do not surrender original devices without legal advice or proper receipt.
- Ask for acknowledgment of documents submitted.
- Keep a complete duplicate set.
LXVII. Receiving Stamp and Proof of Filing
Whenever documents are submitted, request a receiving stamp or acknowledgment showing:
- Date of submission.
- Office receiving.
- Name or signature of receiving personnel.
- List of documents submitted.
- Case reference, if available.
This prevents later disputes about whether documents were filed on time.
LXVIII. Settlement During NBI Investigation
Parties may settle during investigation. Settlement may include:
- Payment.
- Return of property.
- Apology.
- Retraction.
- Undertaking.
- Withdrawal of complaint.
- Affidavit of desistance.
- Compromise agreement.
- Non-disparagement clause.
- Confidentiality clause.
However, settlement does not automatically terminate criminal liability, especially for public offenses. The NBI or prosecutor may still act if the evidence supports prosecution. Settlement is more effective in certain private or property-related disputes but should be handled carefully.
LXIX. Affidavit of Undertaking
An affidavit of undertaking may be used when a party promises to do or refrain from doing something, such as pay an amount, return property, delete posts, stop contacting a person, or submit documents.
It should be clear, voluntary, and specific. Vague undertakings are hard to enforce.
LXX. Demand Letters and NBI Complaints
A demand letter may be relevant evidence, especially in estafa, collection-related disputes, cyberlibel, threats, and breach of agreement cases.
A demand letter can show:
- The complainant sought resolution.
- The respondent was notified.
- The respondent refused or failed to comply.
- The respondent gave admissions.
- The timeline of dispute.
However, demand letters should avoid threats, defamatory accusations, or language that may create counterclaims.
LXXI. Barangay Proceedings and NBI Complaints
Some disputes may require barangay conciliation before court action, depending on the parties’ residences and the nature of the offense. However, many serious criminal complaints, cybercrime complaints, offenses punishable above certain thresholds, or disputes involving parties in different localities may not require barangay conciliation.
The NBI may still receive complaints, but the prosecutor may consider whether barangay conciliation is required in certain cases.
LXXII. NBI Cybercrime Complaints
For cybercrime complaints, the NBI may require more technical evidence.
Complainants should prepare:
- URLs.
- Screenshots.
- Account profile links.
- Date and time of access.
- Device used.
- Email headers, if relevant.
- Phone numbers.
- Transaction records.
- IP-related information, if available.
- Platform usernames.
- Screen recordings.
- Witness affidavits.
- Proof of account ownership or identification.
- Preservation request, where appropriate.
Cybercrime evidence can disappear quickly. Prompt preservation is important.
LXXIII. Digital Forensics
The NBI may conduct or request digital forensic examination in cases involving:
- Hacking.
- Unauthorized access.
- Identity theft.
- Online scams.
- Child exploitation.
- Threats.
- Cyberlibel.
- Data theft.
- Device tampering.
- Malware.
- Fake accounts.
Digital forensic handling should be done carefully to avoid compromising evidence.
LXXIV. Red Flags in Criminal Complaints
A complaint may be weak if:
- It is based only on suspicion.
- There is no identified respondent.
- Evidence is hearsay.
- Documents are incomplete.
- Dates are inconsistent.
- The matter is purely contractual with no criminal intent.
- Screenshots are cropped or unauthenticated.
- The complainant delayed unreasonably without explanation.
- The affidavit exaggerates facts.
- Witnesses contradict each other.
- The alleged act does not match the offense charged.
LXXV. Red Flags in a Respondent’s Defense
A defense may be weak if:
- It is a bare denial.
- It contradicts written messages.
- It ignores receipts or records.
- It relies only on character attacks.
- It admits receiving money but gives no credible explanation.
- It admits posting statements but claims “freedom of speech” without basis.
- It attacks technicalities but ignores strong evidence.
- It provides fake or altered documents.
- It fails to explain account ownership.
- It misses deadlines.
LXXVI. Practical Tips for NBI Appearance
When appearing at the NBI:
- Dress appropriately.
- Arrive early.
- Bring valid ID.
- Bring the subpoena.
- Bring counsel if needed.
- Bring copies, not just originals.
- Keep a file folder of documents.
- Stay calm and respectful.
- Do not argue with the investigator.
- Do not volunteer unnecessary information.
- Ask for clarification if confused.
- Read before signing.
- Request copies of anything signed.
- Keep proof of submission.
- Avoid discussing the case publicly afterward.
LXXVII. What Not to Do After Receiving an NBI Subpoena
Do not:
- Ignore it.
- Panic and contact the complainant aggressively.
- Destroy documents.
- Delete messages.
- Wipe devices.
- Fabricate evidence.
- Ask witnesses to lie.
- Post about the case online.
- Threaten the complainant.
- Sign documents without reading.
- Go alone if you are a respondent in a serious case.
- Give passwords or surrender devices without advice.
- Pay anyone claiming they can “fix” the case.
- Assume the matter is harmless because it is not yet in court.
LXXVIII. Overseas Parties and Remote Affidavit Preparation
If a complainant, respondent, or witness is outside the Philippines, the affidavit should be planned carefully.
Steps may include:
- Draft affidavit based on personal knowledge.
- Attach evidence.
- Execute before a Philippine consular officer or local notary with apostille, as needed.
- Send original authenticated documents to the Philippines.
- Provide scanned copies for initial review.
- Coordinate with counsel for filing.
- Confirm whether remote appearance is allowed.
- Monitor notices and deadlines.
For overseas Filipinos and foreign witnesses, document authentication can affect timing.
LXXIX. Interaction with Immigration, Employment, and Clearances
An NBI investigation does not always appear as a criminal conviction or pending court case. However, if the matter progresses to a filed criminal case or warrant, it may affect:
- NBI clearance.
- Employment background checks.
- Professional licensing.
- Overseas deployment.
- Immigration documents.
- Travel plans.
- Government clearances.
The specific effect depends on the status of the case and the records involved.
LXXX. Legal Representation
Legal representation is advisable when:
- You are named as respondent.
- The offense is serious.
- You are asked to sign a statement.
- You are asked to surrender documents or devices.
- The complaint involves cybercrime.
- The complaint involves money, fraud, or falsification.
- You are a corporate officer.
- You are abroad.
- You need to file a counter-affidavit.
- You received a prosecutor’s subpoena after NBI proceedings.
- There is risk of arrest, warrant, or public exposure.
Counsel can help prevent early mistakes that may be difficult to correct later.
LXXXI. Conclusion
An NBI subpoena in a criminal complaint is a serious legal document that should not be ignored. It may be part of an investigation before a case is referred to the prosecutor, but what happens at this stage can strongly influence whether the matter is dismissed, settled, expanded, or formally prosecuted.
Affidavits are central to Philippine criminal complaint practice. A complaint-affidavit must clearly narrate the facts, identify the respondent, attach evidence, and show the elements of the offense. A counter-affidavit must answer the allegations, raise defenses, and present supporting proof. Witness affidavits, documentary evidence, electronic evidence, and proper authentication can determine the strength of the case.
For complainants, the key is to file a truthful, specific, evidence-supported complaint. For respondents, the key is to respond carefully, preserve rights, avoid self-incrimination, and submit a well-prepared counter-affidavit when appropriate. For witnesses and records custodians, the key is to comply properly while protecting privileged, confidential, and irrelevant information.
The NBI stage is not merely informal. Statements made, documents submitted, and affidavits signed may shape the entire criminal process. Careful preparation, accurate affidavits, proper evidence handling, and timely legal advice are essential.