Introduction

Filing a complaint with the National Bureau of Investigation, commonly known as the NBI, is one of the formal ways a person in the Philippines may seek government investigation of a suspected crime. The NBI is a national investigative agency under the Department of Justice. It handles criminal complaints, conducts investigations, gathers evidence, assists in case build-up, and may recommend the filing of criminal charges before the proper prosecutor’s office.

A complaint filed with the NBI is not the same as directly filing a criminal case in court. In most situations, the NBI investigates first. After investigation, if the evidence appears sufficient, the matter may be endorsed to the prosecutor for preliminary investigation, inquest, or other appropriate action.

This article explains, in the Philippine legal context, what the NBI does, when a person may file a complaint, what documents are usually needed, how the complaint process works, what happens after filing, and what rights and responsibilities complainants should understand.

I. What the NBI Is

The National Bureau of Investigation is a national law enforcement and investigative agency of the Philippine government. It is often compared to a central investigative body because it has authority to investigate crimes, assist prosecutors, conduct forensic examinations, serve warrants when properly authorized, and coordinate with other government agencies.

The NBI is distinct from the Philippine National Police. The PNP is the country’s primary police force, while the NBI is a national investigative bureau with specialized divisions and forensic capabilities. In practice, both may investigate criminal matters, depending on the nature of the complaint.

The NBI may become involved when a case involves complex evidence, cybercrime, fraud, public interest, cross-border elements, public officials, organized criminal activity, threats, missing persons, falsified documents, or matters requiring specialized investigation.

II. When a Complaint May Be Filed With the NBI

A person may consider filing a complaint with the NBI when they believe a crime has been committed and they need assistance in investigation, evidence preservation, identification of suspects, or preparation of a criminal complaint.

Common matters brought to the NBI include:

Cybercrime

Examples include online scams, hacking, identity theft, phishing, unauthorized access, online threats, cyber libel, sextortion, online blackmail, fake accounts, investment scams conducted online, and misuse of personal information.
Estafa and fraud

These include investment schemes, fake transactions, bogus sellers, falsified receipts, fraudulent loans, business scams, and misappropriation of money or property.
Threats, coercion, harassment, and blackmail

Complaints may involve text threats, online threats, intimidation, extortion, or coercive demands.
Falsification and use of fake documents

Examples include falsified public documents, fake IDs, forged signatures, altered contracts, fake certificates, fraudulent land documents, and falsified receipts.
Identity theft

This may involve another person using someone’s name, photographs, personal data, identification documents, bank details, or online accounts without authority.
Human trafficking and exploitation

The NBI may investigate suspected trafficking, illegal recruitment, online sexual exploitation, and related offenses.
Violence, abuse, or exploitation

Certain complaints involving women, children, or vulnerable persons may be handled by specialized offices or coordinated with other agencies.
Missing persons

A missing person report may be referred to appropriate law enforcement offices, including the NBI, especially where foul play, trafficking, or abduction is suspected.
Public corruption or misconduct

Some complaints involving public officers may be investigated by the NBI, though other agencies such as the Ombudsman may also have jurisdiction depending on the facts.
Other criminal offenses

The NBI may act on many types of complaints if investigation is warranted and the matter falls within its authority.

III. NBI Complaint vs. Police Blotter vs. Prosecutor’s Complaint

It is important to distinguish between related but different remedies.

1. Police blotter

A police blotter is an official police record of an incident. It does not automatically create a criminal case. It is useful for documenting that an event was reported at a particular time and place.

2. NBI complaint

An NBI complaint asks the NBI to investigate. The NBI may gather evidence, interview witnesses, conduct forensic examination, issue subpoenas where legally available, coordinate with service providers or agencies, and prepare a report or endorsement.

3. Complaint-affidavit before the prosecutor

A criminal complaint before the prosecutor begins the process of determining whether there is probable cause to charge a respondent in court. A complainant may file directly with the prosecutor, or the NBI may refer the case after investigation.

4. Court case

A criminal case is filed in court only after the prosecutor files an information, except in situations governed by specific procedures.

IV. Who May File a Complaint

A complaint may generally be filed by:

The victim of the alleged crime;
A parent, guardian, or legal representative of a minor or incapacitated person;
An authorized representative of a corporation, partnership, association, or organization;
A person with direct knowledge of the offense;
A government agency or official, in appropriate cases.

For corporate complainants, the NBI may require proof of authority, such as a board resolution, secretary’s certificate, special power of attorney, or written authorization.

For minors, a parent or guardian usually assists. In sensitive cases, such as abuse, trafficking, or exploitation, special handling and coordination with child-protection authorities may apply.

V. Where to File a Complaint

A complaint may be filed at the NBI main office or at an NBI regional, district, or satellite office that receives complaints. The appropriate office may depend on the complainant’s location, the place where the offense occurred, the type of crime, or the division that handles the subject matter.

For cybercrime matters, complaints are commonly directed to the NBI Cybercrime Division or the relevant cybercrime unit in an NBI regional office. For document examination, forensic issues, or specialized crimes, the complaint may be referred internally to the proper division.

A complainant should bring original documents and photocopies. Some offices may require initial screening before accepting a complaint.

VI. Types of Complaints Commonly Handled by Specialized NBI Units

Although internal structures may change, NBI complaints are often assigned according to subject matter. The following are common categories:

1. Cybercrime complaints

These include online scams, social media impersonation, hacking, online libel, phishing, unauthorized account access, online threats, sextortion, and digital blackmail.

The complainant should preserve screenshots, URLs, user profiles, transaction records, chat logs, emails, IP-related information if available, and device details.

2. Anti-fraud complaints

These may involve estafa, investment fraud, fake sellers, unauthorized transactions, forged receipts, and deceptive business schemes.

Documents usually include contracts, receipts, proof of payment, bank transfer records, demand letters, chat messages, and identification of suspects.

3. Falsification complaints

These may require original documents or certified copies. The NBI may conduct or request forensic document examination where necessary.

4. Threat and extortion complaints

The complainant should preserve messages, call logs, recordings where lawfully obtained, screenshots, account details, demand messages, and proof of payment if money was extorted.

5. Identity theft complaints

Evidence may include fake profiles, unauthorized account activity, government IDs used without consent, bank notices, screenshots, affidavits, and correspondence with platforms or institutions.

6. Trafficking, exploitation, and abuse complaints

These are sensitive matters. The complainant should provide details carefully, and the NBI may coordinate with social workers, prosecutors, the Department of Justice, local government units, or other agencies.

VII. Documents Usually Needed

The exact requirements depend on the complaint, but complainants should usually prepare the following:

1. Valid government-issued identification

Bring at least one valid ID, and preferably more than one. Examples include a passport, driver’s license, UMID, PhilID, voter’s ID, PRC ID, SSS ID, GSIS ID, postal ID, or other accepted government ID.

2. Complaint-affidavit or written narrative

The complaint should state the facts clearly. It should identify:

The complainant;
The respondent or suspect, if known;
The acts complained of;
Dates, times, and places;
The manner by which the offense was committed;
The damage suffered;
The evidence available;
The witnesses, if any;
The relief or action requested.

Some complainants prepare a notarized complaint-affidavit before going to the NBI. Others submit an initial narrative and are later guided on affidavit requirements.

3. Evidence

Evidence may include:

Screenshots;
Chat logs;
Emails;
Receipts;
Bank transfer records;
GCash, Maya, bank, or remittance transaction details;
Contracts;
Promissory notes;
Demand letters;
Photographs;
Videos;
Audio recordings, if lawfully obtained;
Certificates;
Government documents;
Business records;
Medical records, where relevant;
Police blotter entries;
Prior complaints;
Witness statements.

4. Original documents and copies

Bring originals for comparison, but submit photocopies unless the NBI specifically requires originals. For electronic evidence, printouts are helpful, but digital copies should also be preserved.

5. Authorization documents

If filing for another person or entity, bring proof of authority, such as:

Special power of attorney;
Board resolution;
Secretary’s certificate;
Authorization letter;
Proof of guardianship;
Birth certificate for minors, where relevant.

6. Contact information

Provide accurate phone numbers, email addresses, physical address, and other contact details. The NBI may need to reach the complainant for interviews, clarifications, hearings, or additional evidence.

VIII. Preparing a Strong Complaint-Affidavit

A complaint-affidavit is a sworn statement of facts. It is one of the most important documents in a criminal complaint.

A good complaint-affidavit should be factual, chronological, specific, and supported by evidence. It should avoid exaggerations, conclusions without basis, and irrelevant accusations.

Essential parts of a complaint-affidavit

Personal circumstances of the complainant

State the full name, age, citizenship, civil status, address, and other identifying details.
Identity of the respondent

If known, state the respondent’s full name, address, contact details, social media profile, business name, or other identifying information.
Chronological narration

Present the events in order. Include dates, times, places, and persons involved.
Specific acts complained of

Describe exactly what the respondent did or failed to do.
Evidence

Refer to attached documents as annexes. For example, screenshots may be marked as Annex “A,” proof of payment as Annex “B,” and chat messages as Annex “C.”
Damage suffered

Explain financial loss, reputational harm, emotional distress, threats, injury, or other consequences.
Prayer or request

State that the complainant is requesting investigation and appropriate legal action.
Signature and jurat

The affidavit should be signed and sworn before a notary public or an officer authorized to administer oaths.

IX. Sample Format of a Complaint-Affidavit

The following is a general format only and should be adapted to the facts of the case.

REPUBLIC OF THE PHILIPPINES CITY/MUNICIPALITY OF __________ ) S.S.

COMPLAINT-AFFIDAVIT

I, [Name of Complainant], of legal age, Filipino, single/married, and residing at [address], after having been duly sworn in accordance with law, state:

I am the complainant in this case.
I am filing this complaint against [Name of Respondent], whose address/contact details/social media account are [details, if known].
On or about [date], at [place or online platform], the respondent [describe the act complained of].
The following facts show how the offense was committed: [state the detailed chronological facts].
As a result, I suffered [state damage, loss, injury, threat, or prejudice].
Attached to this Complaint-Affidavit are copies of the following evidence:
- Annex “A” — [description]
- Annex “B” — [description]
- Annex “C” — [description]
I am executing this affidavit to request the National Bureau of Investigation to investigate this matter and to take appropriate legal action against the respondent.

IN WITNESS WHEREOF, I have signed this affidavit this ___ day of __________ 20___ in [place].

[Signature] [Name of Complainant]

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

X. How to File a Complaint With the NBI

The process may vary depending on the office and the nature of the complaint, but the usual steps are as follows.

Step 1: Identify the nature of the complaint

Before going to the NBI, determine what type of offense may be involved. For example, an online investment scam may involve estafa and cybercrime. A fake Facebook account may involve identity theft, cyber libel, or unjust vexation depending on the content and acts. Forged signatures may involve falsification.

The complainant does not need to know the exact criminal provision with certainty, but it helps to describe the facts clearly.

Step 2: Gather and preserve evidence

Evidence should be collected before it disappears. This is especially important in cybercrime cases because posts, accounts, messages, and websites may be deleted.

For digital evidence, preserve:

Screenshots showing full context;
URLs;
Account names and profile links;
Date and time stamps;
Transaction numbers;
Email headers, if available;
Device information;
Original files;
Backup copies.

Avoid editing screenshots. Keep original files. Do not delete messages. Do not engage further with suspects if doing so may endanger you or compromise the investigation.

Step 3: Prepare a written narrative or complaint-affidavit

Write a clear account of what happened. The narrative should answer:

Who was involved?
What happened?
When did it happen?
Where did it happen?
How did it happen?
What evidence supports it?
What damage resulted?

Step 4: Go to the appropriate NBI office

Bring identification, evidence, copies, and the complaint-affidavit or written narrative. At the NBI office, the complaint may undergo intake or screening. The complainant may be directed to a specific division or investigator.

Step 5: Submit the complaint and supporting documents

The complainant may be asked to submit copies of evidence, sign forms, provide contact information, and answer initial questions. The NBI may require a sworn affidavit or additional documents.

Step 6: Interview and case evaluation

An investigator may interview the complainant to clarify facts, identify possible offenses, determine available evidence, and assess whether further investigation is needed.

Step 7: Assignment to an investigator or division

If the matter is accepted for investigation, it may be assigned to an investigator or specialized unit. The complainant should keep the assigned investigator’s contact details and reference information.

Step 8: Further investigation

The NBI may conduct further investigation, which may include:

Taking statements from witnesses;
Examining documents;
Conducting surveillance, where legally appropriate;
Coordinating with banks, platforms, telecommunications providers, or agencies;
Conducting forensic analysis;
Inviting or subpoenaing persons;
Preparing reports;
Coordinating with prosecutors.

Step 9: Referral to prosecutor

If the NBI finds sufficient basis, it may prepare a referral or complaint for filing before the prosecutor’s office. The prosecutor then determines whether probable cause exists.

Step 10: Prosecutorial proceedings

The prosecutor may require counter-affidavits from respondents, reply-affidavits from complainants, clarificatory hearings, or additional evidence. If probable cause is found, an information may be filed in court.

XI. Filing a Cybercrime Complaint With the NBI

Cybercrime complaints are among the most common complaints filed with the NBI.

Common cybercrime complaints

These include:

Online scams;
Hacking;
Unauthorized access to accounts;
Identity theft;
Cyber libel;
Online threats;
Sextortion;
Phishing;
Fake online stores;
Investment scams;
Unauthorized use of photos;
Data privacy-related misuse;
Online harassment.

Evidence for cybercrime complaints

For cybercrime matters, the complainant should prepare:

Screenshots of conversations, posts, comments, profiles, and pages;
URLs of social media accounts, websites, posts, or listings;
Date and time of each relevant act;
Names, aliases, usernames, phone numbers, email addresses, and account links;
Proof of payment or transfer;
Bank, e-wallet, or remittance transaction records;
Device information, where relevant;
Emails with headers, where relevant;
Copies of demand messages or threats;
Any prior reports to the platform, bank, or police.

Preservation of digital evidence

Digital evidence should be preserved in its original form whenever possible. Screenshots are useful, but the original messages, files, metadata, URLs, and devices may be more valuable. Do not alter, crop, or manipulate evidence in a way that may cast doubt on authenticity.

Cyber libel complaints

For cyber libel, the complainant should preserve the allegedly defamatory post, the profile or page where it appeared, date and time of publication, URL, screenshots, comments, shares, and evidence showing identification of the complainant. The complaint should explain why the statement is false, defamatory, malicious, public, and identifiable as referring to the complainant.

Because cyber libel involves free speech issues and legal technicalities, complainants should be careful to distinguish criticism, opinion, insult, and actionable defamatory imputation.

Online scam complaints

For online scams, evidence usually includes proof of payment, seller’s account, transaction messages, item listing, delivery details, receipts, tracking information, and attempts to demand refund or performance.

Sextortion and blackmail

Victims should avoid paying further demands if possible and should preserve all threats and communications. Sensitive material should be handled carefully. The complainant may request privacy-sensitive handling, especially where sexual images, minors, or exploitation are involved.

XII. Filing a Complaint for Estafa or Fraud

Estafa generally involves deceit, abuse of confidence, or fraudulent means causing damage. Complaints involving money or property often require clear proof of transaction and misrepresentation.

Evidence commonly needed

Written agreements;
Receipts;
Bank statements;
Proof of transfer;
Chat messages;
Demand letters;
Acknowledgments of debt;
Promissory notes;
Advertisements or representations;
Witness statements;
Proof of failure or refusal to comply.

Demand letter

In many fraud-related complaints, a prior demand letter may help show that the respondent failed or refused to return money, deliver goods, or comply with obligations. A demand letter is not always required for every case, but it can strengthen the factual record.

Civil liability vs. criminal liability

Not every unpaid debt is estafa. A simple failure to pay a debt may be civil in nature. Criminal fraud usually requires deceit, misappropriation, abuse of confidence, or another criminal element. The facts must show more than breach of contract.

XIII. Filing a Complaint for Threats, Harassment, or Extortion

Complaints involving threats should state the exact words used, the medium of communication, the date and time, the identity of the sender, and the reason the complainant fears harm.

Evidence may include:

Text messages;
Chat screenshots;
Call logs;
Voice recordings, if lawfully obtained;
Witness affidavits;
CCTV footage;
Photographs;
Demand messages;
Proof of payment in extortion cases;
Police blotter.

If there is immediate danger, the complainant should seek urgent police assistance and not rely solely on later NBI investigation.

XIV. Filing a Complaint for Falsification

Falsification cases often require careful examination of documents.

Common examples

Forged signatures;
Altered dates or amounts;
Fake notarization;
Fake certificates;
Fake IDs;
False statements in public documents;
Fabricated contracts;
Spurious land documents.

Evidence may include:

Original document;
Certified true copy;
Specimen signatures;
Related correspondence;
Notarial records;
Registry records;
Witness affidavits;
Prior authentic documents for comparison.

The NBI may refer the document for examination, but the availability and process may depend on the office and case requirements.

XV. Filing a Complaint for Identity Theft

Identity theft may involve unauthorized use of another person’s identity, documents, image, or personal information.

Examples

Fake social media account using your name and photos;
Use of your ID to borrow money;
SIM registration using your identity;
Opening accounts under your name;
Impersonation for scams;
Unauthorized use of personal data.

Evidence

Screenshots of fake accounts;
URLs;
Copies of unauthorized transactions;
Notices from banks or platforms;
Copies of IDs misused;
Affidavit denying authorization;
Reports made to platforms or institutions.

Identity theft may also raise data privacy issues. Depending on the facts, a complaint may also be filed with the National Privacy Commission.

XVI. What Happens After Filing

After a complaint is filed, several outcomes are possible.

1. The complaint may be accepted for investigation

The NBI may assign an investigator, request further documents, interview witnesses, and begin case build-up.

2. The complainant may be asked to submit additional evidence

If documents are incomplete, the NBI may ask for more proof, clearer screenshots, original records, notarized affidavits, or witness statements.

3. The complaint may be referred to another agency

Some matters may be better handled by the police, prosecutor’s office, barangay, Ombudsman, Department of Labor and Employment, National Privacy Commission, Securities and Exchange Commission, or another agency.

4. The NBI may invite or subpoena the respondent

Depending on the case, the NBI may call persons for questioning or require documents. A person receiving an NBI invitation or subpoena should treat it seriously.

5. The NBI may recommend filing before the prosecutor

If the evidence supports a criminal complaint, the NBI may endorse the matter to the prosecutor.

6. The case may not proceed

If evidence is insufficient, the facts do not show a crime, the matter is civil in nature, or the respondent cannot be identified, the case may not proceed unless additional evidence is obtained.

XVII. Does Filing With the NBI Automatically Mean a Case Will Be Filed in Court?

No. Filing with the NBI does not automatically mean a criminal case will be filed in court. The NBI investigates and may recommend prosecution, but the prosecutor determines whether there is probable cause to file charges in court.

A complainant should understand the stages:

Incident occurs;
Complaint is filed with NBI;
NBI investigates;
NBI may refer the case to the prosecutor;
Prosecutor conducts preliminary investigation, if required;
Prosecutor determines probable cause;
Information is filed in court;
Court proceedings begin.

XVIII. Preliminary Investigation After NBI Referral

For offenses requiring preliminary investigation, the prosecutor evaluates whether there is probable cause. The respondent is usually given a chance to submit a counter-affidavit. The complainant may submit a reply-affidavit. The prosecutor may require clarificatory hearings.

If probable cause is found, the prosecutor may file an information in court. If not, the complaint may be dismissed. A dismissal may sometimes be challenged through appropriate remedies, depending on the circumstances and procedural rules.

XIX. Inquest Proceedings

If a suspect is lawfully arrested without a warrant under circumstances allowed by law, the case may undergo inquest instead of ordinary preliminary investigation. Inquest is a faster prosecutor-level proceeding to determine whether the person should remain in custody and be charged in court.

The NBI may participate in arrests and inquest proceedings where legally appropriate, particularly in entrapment operations or cases involving ongoing offenses.

XX. Entrapment Operations

In some cases, especially extortion, online exploitation, trafficking, or illegal transactions, law enforcement may conduct an entrapment operation.

Entrapment is different from instigation. In entrapment, law enforcement catches a person already engaged in criminal activity. In instigation, law enforcement induces a person to commit a crime they otherwise would not have committed, which may be legally improper.

A complainant should not conduct a private entrapment operation without law enforcement guidance. Doing so may create safety risks and evidentiary problems.

XXI. Fees and Costs

Filing a complaint with the NBI generally should not require payment of illegal or unofficial fees. However, complainants may incur legitimate costs for:

Photocopying;
Printing;
Notarization;
Certification of documents;
Transportation;
Legal assistance;
Forensic or documentary requirements, if applicable.

Complainants should ask for official receipts for any official payments and should avoid fixers.

XXII. How Long the Process Takes

There is no single fixed timeline. The length of an NBI investigation depends on:

Complexity of the case;
Availability of evidence;
Number of respondents;
Need for forensic examination;
Cooperation of platforms, banks, or agencies;
Location of suspects;
Workload of the assigned office;
Whether the matter requires prosecutor action;
Whether additional witnesses must be interviewed.

Simple complaints may be evaluated quickly. Complex cybercrime, fraud, or document cases may take longer.

XXIII. Rights of the Complainant

A complainant generally has the right to:

File a complaint and submit evidence;
Be treated with dignity and respect;
Ask about the status of the complaint;
Submit supplemental evidence;
Be informed of required documents;
Request privacy in sensitive matters;
Seek legal counsel;
File directly with the prosecutor if appropriate;
Pursue civil remedies when available;
Seek protection from immediate threats through proper authorities.

Victims of certain offenses may have additional rights under special laws, such as laws protecting women, children, trafficking victims, or victims of sexual offenses.

XXIV. Responsibilities of the Complainant

A complainant should:

Tell the truth;
Submit authentic evidence;
Avoid fabricating or altering documents;
Preserve original evidence;
Cooperate with investigators;
Attend scheduled interviews or proceedings;
Provide updated contact details;
Avoid public posts that may prejudice the case;
Avoid threatening or harassing the respondent;
Understand that false accusations may have legal consequences.

Filing a knowingly false complaint can expose the complainant to criminal, civil, or administrative liability.

XXV. Rights of the Respondent

A respondent also has rights. The justice system requires fairness to both sides.

A respondent may have the right to:

Be informed of the accusation;
Remain silent in appropriate situations;
Consult counsel;
Submit a counter-affidavit during preliminary investigation;
Present evidence;
Be presumed innocent unless proven guilty beyond reasonable doubt in court;
Challenge unlawful arrests, searches, or seizures;
Contest the admissibility of evidence.

A complainant should therefore focus on evidence and lawful procedures rather than public shaming or harassment.

XXVI. Evidence Rules and Practical Considerations

1. Screenshots are useful but not always enough

Screenshots can support a complaint, but investigators and prosecutors may ask for additional proof, such as URLs, metadata, device access, certifications, platform records, or corroborating evidence.

2. Preserve the original source

Keep the phone, computer, account, email, or storage device containing the original messages or files. Do not delete relevant conversations.

3. Chain of custody matters

For evidence, especially digital evidence, the manner of collection, storage, and presentation matters. Altered or incomplete evidence may be challenged.

4. Witness affidavits strengthen a complaint

If other persons saw the incident, received the same messages, joined the transaction, or can identify the respondent, their affidavits may help.

5. Documentary consistency matters

Dates, names, amounts, account numbers, and narratives should be consistent across the affidavit, annexes, demand letters, and other submissions.

XXVII. Common Mistakes When Filing an NBI Complaint

1. Filing with incomplete evidence

A bare accusation without documents, witnesses, or details may be difficult to investigate.

2. Not preserving digital evidence

Many complainants lose evidence because they delete conversations, block accounts, change phones, or fail to capture URLs.

3. Confusing civil disputes with crimes

Not all breaches of contract, unpaid debts, failed relationships, or business disagreements are criminal offenses.

4. Posting accusations online

Public accusations may expose the complainant to counterclaims, including defamation or cyber libel complaints.

5. Relying only on verbal claims

Oral statements should be supported by documents, messages, witnesses, or other corroboration.

6. Not following up

Complainants should keep records and follow up respectfully. They should note the assigned investigator, reference number, and dates of submission.

7. Paying fixers

Complainants should avoid anyone promising special treatment or guaranteed results in exchange for unofficial payment.

XXVIII. Filing Through a Lawyer

A lawyer is not always required to file an NBI complaint, but legal assistance may be valuable, especially in complex cases.

A lawyer can help:

Identify the correct offense;
Draft the complaint-affidavit;
Organize evidence;
Prepare witnesses;
Communicate with investigators;
File directly with the prosecutor;
Protect the complainant from counterclaims;
Coordinate civil, criminal, and administrative remedies.

For serious offenses, large financial losses, cyber libel, corporate fraud, public official involvement, or cases involving minors, legal counsel is strongly advisable.

XXIX. May a Complaint Be Filed Without Knowing the Suspect’s Real Name?

Yes, in some situations. A complainant may file based on aliases, usernames, phone numbers, account names, email addresses, wallet numbers, bank accounts, IP-related details, or other identifiers. The NBI may attempt to identify the suspect through investigation.

However, identifying the respondent is often necessary before prosecution can move forward. The more identifying information the complainant provides, the stronger the case build-up may be.

Useful identifiers include:

Full name;
Alias;
Mobile number;
Email address;
Social media URL;
Username;
Bank account name and number;
E-wallet number;
Remittance claim details;
Delivery address;
Vehicle plate number;
Business registration;
IP-related information, where available;
Photos or videos;
Known associates.

XXX. May OFWs or Persons Abroad File a Complaint?

Filipinos abroad or victims located outside the Philippines may still report crimes connected to the Philippines, Filipino suspects, Philippine-based transactions, or online offenses affecting them. They may need assistance from a representative in the Philippines, a lawyer, or Philippine consular officials.

Documents executed abroad may need consular acknowledgment, apostille, notarization, or authentication depending on the intended use. The practical procedure depends on the country, the document, and the receiving office.

XXXI. Complaints Involving Minors

When the victim is a minor, special care is required. A parent, guardian, social worker, or authorized representative may assist. Cases involving child abuse, exploitation, online sexual abuse, trafficking, or sexual offenses should be handled sensitively and may involve coordination with child-protection units, prosecutors, social welfare officers, and courts.

The identity and privacy of minors should be protected. Complainants should avoid posting details online.

XXXII. Complaints Involving Violence Against Women and Children

Complaints involving violence against women and children may be brought to police women and children protection desks, prosecutors, courts, barangays for certain protective remedies, or the NBI depending on the facts.

If there is immediate danger, urgent protective action should be sought from law enforcement, the barangay, courts, or appropriate agencies. NBI investigation may supplement but should not delay emergency protection.

XXXIII. Complaints Involving Data Privacy

Some complaints involving unauthorized use, disclosure, processing, or exposure of personal information may fall under data privacy laws. Depending on the facts, a complainant may consider remedies before the National Privacy Commission in addition to criminal remedies.

Examples include unauthorized disclosure of personal data, misuse of IDs, data breach-related harm, and unauthorized processing by companies or individuals.

XXXIV. Complaints Involving Investment Scams

Investment scams may involve estafa, securities violations, cybercrime, syndicated activity, or other offenses.

Complainants should gather:

Investment solicitations;
Promised returns;
Contracts;
Receipts;
Proof of payment;
Names of recruiters;
Bank or e-wallet details;
Group chat records;
Promotional materials;
SEC-related documents or lack thereof;
Demand letters;
List of other victims, if available.

Investment-related complaints may also be relevant to the Securities and Exchange Commission, especially when the activity involves unauthorized solicitation of investments.

XXXV. Complaints Involving Banks and E-Wallets

When money is sent through a bank, remittance center, or e-wallet, the complainant should immediately preserve transaction records and report the suspected fraud to the financial institution.

Useful documents include:

Transaction reference number;
Account name;
Account number or wallet number;
Date and time of transfer;
Amount;
Confirmation receipt;
Chat messages leading to payment;
Any report made to the bank or e-wallet provider.

The NBI may require these details to trace transactions or support a fraud complaint.

XXXVI. Complaints Involving Social Media Platforms

For complaints involving Facebook, Instagram, TikTok, X, YouTube, Telegram, WhatsApp, Viber, dating apps, or other platforms, the complainant should preserve:

Profile URL;
Username;
Display name;
User ID, if visible;
Screenshots;
Post URLs;
Comments;
Messages;
Date and time stamps;
Group or page names;
Admin details, where relevant;
Reports made to the platform.

Do not rely only on the displayed name, because accounts may change names or be deleted.

XXXVII. The Role of Barangay Proceedings

Some disputes must pass through barangay conciliation before court action if the parties reside in the same city or municipality and the matter is covered by the Katarungang Pambarangay system. However, many criminal complaints, urgent matters, offenses above certain penalties, cases involving parties from different localities, and cases requiring immediate law enforcement action may fall outside barangay conciliation requirements.

For NBI complaints, barangay proceedings may or may not be relevant depending on the offense and parties. A barangay blotter or certification may help document prior incidents, but it does not replace criminal investigation.

XXXVIII. Confidentiality and Privacy

Complainants should be careful with sensitive information. NBI complaints may involve private data, sexual content, financial records, minors, medical records, trade secrets, or reputational issues.

Practical precautions include:

Submit only relevant personal data;
Mark sensitive documents clearly;
Avoid unnecessary public disclosure;
Keep copies secure;
Do not post complaint documents online;
Ask how sensitive evidence will be handled;
Use sealed envelopes or digital storage where appropriate.

XXXIX. Can a Complaint Be Withdrawn?

A complainant may express a desire to withdraw a complaint, but criminal offenses are generally considered offenses against the State. Once authorities have acted, withdrawal does not always automatically terminate the case.

For some offenses, settlement, desistance, compromise, or affidavit of desistance may affect proceedings, but it does not always bind the prosecutor or court. In serious offenses, the State may proceed despite the complainant’s change of position.

XL. Settlement and Compromise

Settlement may resolve civil liability, but it does not automatically erase criminal liability. In some cases, payment, restitution, apology, or compromise may affect the complainant’s interest or the prosecutor’s evaluation. In other cases, especially serious crimes, prosecution may continue.

Complainants should be cautious in signing quitclaims, waivers, affidavits of desistance, or settlement agreements without understanding their legal consequences.

XLI. What to Do Before Going to the NBI

Before filing, prepare a folder containing:

Valid ID;
Complaint-affidavit or written narrative;
Timeline of events;
List of witnesses;
Printed evidence;
Digital copies of evidence;
Original documents, where available;
Proof of payment or loss;
Police blotter, if any;
Demand letter, if any;
Contact details of suspects;
Authorization documents, if filing for another person or company.

A clear timeline is especially helpful. It allows the investigator to understand the case quickly.

XLII. Practical Timeline Template

A complainant may prepare a simple timeline like this:

Date	Event	Evidence
January 3, 20__	Respondent offered investment through Messenger	Annex A screenshots
January 5, 20__	Complainant sent ₱50,000 through bank transfer	Annex B receipt
January 20, 20__	Respondent promised return of ₱60,000	Annex C chat
February 1, 20__	Respondent stopped replying	Annex D screenshots
February 10, 20__	Demand letter sent	Annex E demand letter

XLIII. Checklist for Cybercrime Complaints

Before filing a cybercrime complaint, prepare:

Full screenshots;
URLs;
Usernames and profile links;
Phone numbers and emails;
Dates and times;
Proof of transaction;
Device used;
Original messages;
Backup files;
Platform reports;
Bank or e-wallet reports;
Written narrative;
Valid ID;
Witness affidavits, if any.

XLIV. Checklist for Fraud or Estafa Complaints

Prepare:

Complaint-affidavit;
Proof of payment;
Contracts or agreements;
Receipts;
Chat logs;
Demand letter;
Respondent’s identity details;
Witness affidavits;
Proof of damage;
Bank or e-wallet records;
Any advertisement or representation made by the respondent.

XLV. Checklist for Threat Complaints

Prepare:

Screenshots of threats;
Call logs;
Recordings, if lawfully obtained;
Witnesses;
Police blotter, if any;
Details of prior incidents;
Identity or contact details of the person making threats;
Explanation of why the threat is serious;
Any evidence of weapons, stalking, or prior violence.

For immediate danger, contact emergency law enforcement services.

XLVI. Checklist for Falsification Complaints

Prepare:

Original or certified document;
Comparison documents;
Specimen signatures;
Notarial details;
Registry or official records;
Witness affidavits;
Explanation of how the document is false;
Evidence of use or damage caused by the falsified document.

XLVII. How to Follow Up on an NBI Complaint

After filing, keep:

Receiving copy;
Reference number;
Name of assigned investigator;
Division or office handling the case;
Date of filing;
List of submitted documents;
Dates of follow-up;
Copies of additional submissions.

Follow up respectfully and periodically. Bring identification and reference details when returning to the NBI office.

XLVIII. When to File Directly With the Prosecutor Instead

A complainant may consider filing directly with the prosecutor when evidence is already complete and the respondent is identifiable. Direct filing may be appropriate when there is no need for further investigation by the NBI.

However, NBI assistance may be useful when:

The suspect is unknown;
Evidence must be traced;
Digital evidence must be preserved;
Forensic analysis is needed;
Multiple victims are involved;
The case involves organized activity;
Law enforcement coordination is needed.

XLIX. When to Go to the Police Instead

Immediate police assistance may be more appropriate when:

A crime is happening now;
There is immediate danger;
The suspect is nearby;
A police blotter is needed urgently;
A warrantless arrest situation exists;
Physical protection is needed;
Domestic violence or threats require immediate response.

The NBI is important for investigation, but it is not always the fastest emergency response option.

L. Possible Legal Remedies Aside From NBI Complaint

Depending on the facts, a complainant may also consider:

Filing with the prosecutor’s office;
Reporting to the PNP;
Filing a barangay complaint, where applicable;
Filing a civil case;
Filing an administrative complaint;
Reporting to the National Privacy Commission;
Reporting to the Securities and Exchange Commission;
Reporting to the Department of Trade and Industry;
Reporting to the Bangko Sentral ng Pilipinas for financial institution issues;
Seeking protection orders in proper cases;
Reporting to social welfare authorities for child or abuse cases.

The appropriate remedy depends on the facts, parties, evidence, and legal objective.

LI. Important Legal Concepts

1. Probable cause

Probable cause means there are facts and circumstances sufficient to lead a reasonable person to believe that a crime was committed and that the respondent is probably guilty. The prosecutor determines probable cause for filing in court.

2. Proof beyond reasonable doubt

This is the standard required for conviction in a criminal case. It is higher than probable cause.

3. Civil liability

Even in criminal cases, the offender may be ordered to pay restitution, damages, or other civil liability if proven.

4. Affidavit

An affidavit is a sworn written statement. False statements in an affidavit may expose the affiant to liability.

5. Subpoena

A subpoena is a legal process requiring a person to appear or produce documents. Ignoring a subpoena may have consequences.

6. Warrant

A warrant is generally issued by a judge upon a finding of probable cause. Searches, seizures, and arrests must comply with constitutional and procedural rules.

LII. Practical Tips for a Strong NBI Complaint

Make a clear timeline.
Organize evidence by date.
Label annexes properly.
Bring originals and copies.
Preserve digital evidence.
Identify the suspect as much as possible.
List witnesses.
Avoid emotional exaggeration.
Focus on facts and documents.
Keep all communication records.
Follow up respectfully.
Consult counsel for complex or serious cases.

LIII. Example: Online Scam Complaint

A complainant bought a phone from a social media seller. The seller requested payment through an e-wallet. After payment, the seller blocked the complainant and deleted the listing.

Relevant evidence may include:

Screenshot of the listing;
Seller’s profile URL;
Chat conversation;
Payment receipt;
E-wallet number;
Delivery promises;
Proof that the complainant was blocked;
Demand message;
Written narrative.

Possible offenses may include estafa and cybercrime-related violations depending on the facts.

LIV. Example: Fake Account and Identity Theft

A person discovers that someone created a social media account using their name and photos to solicit money from friends.

Relevant evidence may include:

URL of the fake account;
Screenshots of the profile;
Screenshots of messages sent by the fake account;
Affidavits from friends who received messages;
Proof of the complainant’s real identity;
Platform report;
Any payment records from victims.

Possible issues may include identity theft, computer-related fraud, or other offenses depending on the specific acts.

LV. Example: Threats Through Text Messages

A complainant receives repeated text messages threatening physical harm unless money is paid.

Relevant evidence may include:

Screenshots of text messages;
Sender’s number;
Dates and times;
Call logs;
Proof of payment, if any;
Police blotter;
Witnesses who saw or heard the threats;
Any prior incidents.

Possible offenses may include grave threats, coercion, robbery/extortion-related offenses, or cybercrime-related offenses if electronic systems are involved.

LVI. Frequently Asked Questions

1. Do I need a lawyer to file with the NBI?

Not always. A complainant may file personally. However, a lawyer is helpful for serious, complex, high-value, corporate, cyber libel, or sensitive cases.

2. Can I file even if I only know the suspect’s online name?

Yes, but provide as many identifiers as possible, such as profile URL, username, phone number, email, bank account, e-wallet number, screenshots, and transaction details.

3. Is a screenshot enough?

Sometimes it helps, but screenshots alone may not be enough. Preserve the original messages, URLs, devices, files, receipts, and account details.

4. Can the NBI arrest someone immediately?

Usually, arrest requires a warrant, unless a lawful warrantless arrest situation exists. The NBI may investigate first and coordinate with prosecutors and courts.

5. Can I file an anonymous complaint?

Anonymous tips may be received in some situations, but a formal complaint usually requires an identified complainant, especially if prosecution will depend on testimony and evidence.

6. Can I file a complaint for unpaid debt?

Possibly, but not every unpaid debt is a crime. If there was fraud, deceit, misappropriation, or abuse of confidence, a criminal complaint may be considered. Otherwise, the remedy may be civil.

7. Can I file for cyber libel over a Facebook post?

Possibly, if the post contains defamatory imputation, identifies the complainant, is published, and meets the legal requirements. Legal advice is strongly recommended because speech-related cases are fact-sensitive.

8. What if the suspect is abroad?

The NBI may still investigate Philippine connections, but cross-border cases are more complex and may require coordination with other agencies.

9. What if I already filed with the police?

You may still seek NBI assistance in appropriate cases, but disclose the prior report to avoid duplication and confusion.

10. What if the NBI says the case is civil?

You may consult a lawyer about civil remedies or direct filing with the prosecutor if you believe criminal elements exist.

LVII. Legal and Practical Cautions

Filing a complaint is a serious legal act. A complainant should avoid making false statements, suppressing relevant facts, fabricating evidence, or using the complaint process to harass another person.

A criminal complaint should be based on truthful facts and good-faith belief that an offense was committed. Misuse of the criminal process may lead to counterclaims or liability.

Complainants should also avoid posting the complaint, evidence, or accusations online while investigation is pending. Public disclosure may affect privacy, evidence, witness credibility, and possible liability.

LVIII. Conclusion

Filing a complaint with the NBI in the Philippines is a formal step toward government investigation of a suspected crime. The process requires preparation, clear facts, organized evidence, and cooperation with investigators. The NBI may investigate, gather evidence, identify suspects, and refer the matter to the prosecutor, but it does not automatically mean a criminal case will be filed in court.

The strongest complaints are those supported by specific facts, authentic documents, preserved digital evidence, witness statements, and a coherent timeline. Complainants should understand the difference between NBI investigation, prosecutor proceedings, and court action. They should also recognize that not every dispute is criminal and that other remedies may be more appropriate depending on the case.

For urgent danger, immediate police or protective assistance should be sought. For complex, sensitive, or high-stakes matters, legal counsel is advisable.