How to File a Cyber Crime & Online Defamation Complaint in Bangladesh (2026)

Social media, messaging apps, websites, online marketplaces, and digital banking have made communication easier, but they have also created new ways for people to become victims of cybercrime. Hacking, online fraud, identity misuse, blackmailing, revenge porn, fake accounts, digital harassment, and other forms of online abuse can cause serious financial, personal, and reputational harm.

Online defamation is another common concern. A false statement, post, video, image, or other publication can potentially damage someone’s reputation, business, or professional standing. However, cybercrime and online defamation are not always handled under the same law in Bangladesh.

As of 2026, Bangladesh’s main cybercrime legislation is the Cyber Security Act, 2026, while criminal defamation continues to be addressed under the Penal Code, 1860. Understanding this distinction is important before filing a complaint.

What Counts as Cybercrime in Bangladesh?

Cybercrime generally involves unlawful conduct involving computers, digital devices, networks, online platforms, or cyberspace.

The Cyber Security Act, 2026 covers a range of conduct, including unauthorized access or hacking, damage to computer systems, malware-related activity, cyber forgery, cyber fraud, unauthorized electronic transactions, cyber terrorism, and certain forms of sexual harassment, blackmailing, revenge porn, and sextortion through digital means.

For example, if someone gains unauthorized access to your Facebook account, steals digital information, uses technology to commit fraud, or threatens to publish intimate material to obtain money or another benefit, the circumstances may potentially fall within the cybercrime framework.

The exact legal provision depends on what happened, how it happened, the evidence available, and the person’s intention.

Is Online Defamation a Cybercrime in Bangladesh in 2026?

The current Cyber Security Act, 2026 does not contain the previous standalone cyber-defamation provision found in earlier cyber legislation. Therefore, simply describing something as “online defamation” does not automatically make it a case under the current Cyber Security Act.

Criminal defamation remains addressed under sections 499 and 500 of the Penal Code, 1860. Section 499 defines defamation, subject to its exceptions, while section 500 provides the punishment for defamation.

This means that a defamatory Facebook post, YouTube video, website article, online review, or other digital publication may need to be considered under the ordinary law of defamation rather than automatically being filed as a Cyber Security Act case.

Because the legal route depends heavily on the facts, it is sensible to have the content reviewed before deciding which type of complaint or case should be filed.

Step 1: Preserve the Digital Evidence Immediately

If you have become a victim of cybercrime or online defamation, preserving evidence should be one of your first priorities.

Do not assume that a social media post will remain online permanently. An account owner can delete a post, change a username, deactivate an account, or edit content.

Save screenshots showing the complete post, profile name, username, URL, date, time, comments, messages, and other relevant information. Where possible, preserve the original electronic files rather than relying only on screenshots.

For videos or audio recordings, keep the original file and record where it was published. Since courts have specific formatting and authenticity requirements for such material, our guide on submitting video evidence in court explains what to keep in mind. For threatening messages, retain the complete conversation rather than only saving one or two selected messages.

If the matter involves financial fraud, preserve transaction IDs, bank records, mobile financial service information, payment receipts, phone numbers, account details, and communications with the suspected person.

The more complete the evidence, the easier it can be for investigators or a lawyer to understand what actually happened.

Step 2: Do Not Edit or Manipulate the Evidence

A common mistake is to crop, alter, annotate, or otherwise modify digital evidence before submitting it.

Keep the original files safely stored and make separate copies for reference. If you need to highlight something for your lawyer, keep the original version untouched.

Digital evidence can involve metadata, timestamps, URLs, account identifiers, device information, and other details that may become relevant during an investigation.

For serious cases, a lawyer may also advise you on preserving evidence in a manner that can later support legal proceedings.

Step 3: Prepare a Written Complaint

A clear written complaint should explain what happened without unnecessary exaggeration.

Include your full name and contact information, a description of the incident, the date and approximate time, the platform or service involved, the identity or account details of the suspected person if known, and the harm caused.

You should also identify the evidence you have available.

For example, instead of writing that someone “destroyed my reputation online,” explain what was published, where it was published, who published it if known, when it appeared, what statements you believe are false or defamatory, and how you can prove the publication occurred.

Step 4: Report Cybercrime to the Appropriate Authority

For an offence falling within the Cyber Security Act, 2026, the law provides for investigation by police or an investigator designated under the relevant chapter.

Bangladesh Police also provides an online complaint submission facility, while the National Cyber Security Agency provides cyber-security assistance and reporting resources.

The NCSA currently lists 333 (8) and 104 as cyber-security help channels and also directs people to its reporting platform for matters such as hacking, information leaks, blackmail, sexual harassment, cyberbullying, and certain other online harms.

The appropriate reporting route can depend on the nature of the incident. A lawyer can help determine which authority and procedure are most appropriate for the particular facts.

Step 5: Understand the Cybercrime Complaint Process

The Cyber Security Act, 2026 contains a specific procedure for bringing cases under the Act.

Under section 40, a person affected by a cyber offence may file a case directly or through a person authorized in writing, while law-enforcement personnel may also initiate proceedings according to the law.

Importantly, if an affected person approaches the police to have a complaint accepted and is unsuccessful, the Act provides a route to submit a written complaint to the Cyber Tribunal with an affidavit explaining that the request to the police failed. If the Tribunal is satisfied after examining the complainant, it can direct the police to investigate.

Cyber Security Act offences are investigated by police, and cases under the Act are tried by the Cyber Tribunal. The law also provides for the use of digital forensic evidence in proceedings. An experienced litigation lawyer in Bangladesh can help you prepare the complaint, affidavit, and supporting evidence correctly at every stage of this process.

Step 6: Filing an Online Defamation Complaint

Online defamation follows a different legal route.

Section 499 of the Penal Code defines defamation, while section 500 provides the punishment for a person who commits defamation. The law also contains exceptions, meaning that not every negative statement, criticism, allegation, or unpleasant online comment automatically amounts to criminal defamation.

The context matters.

For example, a complaint may need to consider whether the statement was factual, whether it was published with the relevant intention or knowledge, whether an exception applies, and whether the material actually concerns the complainant’s reputation in the legal sense.

Under section 198 of the Code of Criminal Procedure, a court generally cannot take cognizance of an offence under Chapter XXI of the Penal Code, which covers defamation, unless a complaint is made by a person aggrieved by the offence.

This makes the identity and legal standing of the complainant particularly important in a defamation case.

What Evidence Is Useful in an Online Defamation Case?

Evidence can make or break a defamation complaint.

Useful material may include screenshots, URLs, downloaded copies of posts or videos, social media profile information, publication dates, comments and shares, messages, witness information, and evidence showing the connection between the publication and the person who allegedly made it.

You should also preserve evidence showing the effect of the publication where relevant. Depending on the circumstances, this could include business communications, professional correspondence, customer messages, or other records showing reputational consequences.

However, reputational harm alone does not automatically prove criminal defamation. The legal requirements of the offence still have to be established.

What If Someone Uses a Fake Account to Defame You?

Fake accounts can make online disputes more complicated because identifying the actual person behind an account may require investigation.

Do not attempt to hack the account or threaten the suspected person in response.

Instead, preserve the profile URL, username, screenshots, messages, posts, and any information connecting the account to the suspected individual.

Where the conduct also involves unauthorized access, fraud, identity misuse, threats, blackmailing, or another specific offence, the facts may potentially raise issues beyond defamation.

A lawyer can help separate the different legal issues instead of treating every fake-account case as a simple defamation complaint. Reading about the role of a civil litigation lawyer can help you understand what to expect from this process.

What If Someone Is Blackmailing You Online?

Blackmailing should be treated seriously, particularly when someone threatens to publish private photographs, videos, messages, or other sensitive information.

Under section 25 of the Cyber Security Act, 2026, certain forms of blackmailing, sexual harassment, revenge porn, sextortion, and related digital publication or threats are criminal offences.

If you are facing this type of situation, preserve the messages and do not delete the conversation. Avoid sending additional money or material simply because the person is threatening you, unless you have received specific legal or law-enforcement advice about what to do.

If there is an immediate threat to your physical safety, contact the appropriate emergency or law-enforcement service immediately.

Can a Cybercrime Complaint Be Filed Online?

Bangladesh Police has an online complaint submission facility, and the National Cyber Security Agency provides cyber-security reporting and assistance channels.

However, an online complaint should not automatically be treated as the same thing as a formally instituted criminal case. The appropriate legal procedure depends on the offence and the authority handling it.

For serious matters, keep a copy of everything submitted and record any complaint reference or acknowledgement you receive.

When Should You Contact a Lawyer?

Legal advice can be particularly useful when the incident involves multiple issues, such as cybercrime combined with defamation, financial loss, blackmailing, threats, identity misuse, or significant business or professional damage.

A lawyer can review the evidence, identify potentially applicable laws, prepare or review the complaint, advise on jurisdiction and procedure, and help you avoid mistakes that could weaken your case.

For individuals and businesses dealing with online disputes in Bangladesh, Legal Advice BD, a trusted Law Firm in Bangladesh, can assist in assessing the facts and determining the appropriate legal route based on the nature of the incident. You can learn more about our team on the About page, explore our full range of legal services, or contact us directly to discuss your situation.

Common Mistakes to Avoid

One of the biggest mistakes is deleting the original evidence after reporting a post to a social media platform.

Another is publicly confronting the accused person and turning the dispute into a larger online argument. This can create additional statements or material that may complicate the situation.

Do not fabricate screenshots, create fake accounts to gather evidence unlawfully, edit conversations to make them appear different, or make unsupported allegations against someone publicly.

Most importantly, do not file a false complaint simply to pressure another person. The Cyber Security Act, 2026 contains a specific offence concerning false cases or complaints filed without lawful or reasonable grounds with the intention of causing harm. If you believe you are facing a false or malicious complaint, it is worth understanding the process to file for anticipatory bail in Bangladesh so you know your options in advance.

Frequently Asked Questions

How do I file a cybercrime complaint in Bangladesh?

Start by preserving the available digital evidence and preparing a clear written description of the incident. You can approach the appropriate police authority or use available official cyber-reporting channels. Depending on the offence, the Cyber Security Act, 2026 provides procedures involving police investigation and the Cyber Tribunal.

Is online defamation a cybercrime in Bangladesh?

Not automatically. As of September 2026, the standalone online-defamation offence from earlier cyber legislation is not part of the current Cyber Security Act, 2026. Criminal defamation remains addressed under sections 499 and 500 of the Penal Code, subject to the law’s definitions and exceptions.

Can I file a defamation complaint for a Facebook post?

Potentially, yes, if the publication satisfies the legal requirements for defamation. The fact that something was posted on Facebook or another online platform does not by itself establish criminal defamation.

What evidence should I collect for online defamation?

Preserve screenshots, URLs, profile information, original files, publication dates, messages, comments, videos, and other material that establishes what was published and who published it. Keep the original evidence unchanged whenever possible.

Can I report cybercrime online in Bangladesh?

Yes. Bangladesh Police provides an online complaint facility, and the National Cyber Security Agency provides cyber-security reporting resources and assistance channels. The exact procedure after reporting depends on the nature of the alleged offence.

What should I do if someone threatens to publish my private photos?

Preserve the threats and original messages, avoid deleting evidence, and seek help promptly. Certain forms of blackmailing, revenge porn, sexual harassment, and sextortion are covered by the Cyber Security Act, 2026.

Do I need a lawyer to file a cybercrime complaint?

You are not necessarily required to have a lawyer for every complaint. However, legal assistance can be valuable when the facts are complicated, significant financial or reputational harm is involved, multiple laws may apply, or you need to pursue proceedings before a court or tribunal.

Final Thoughts

Cybercrime and online defamation require careful handling because digital evidence can disappear quickly and the correct legal route depends on what actually happened.

The first priorities are usually to preserve the evidence, document the incident accurately, avoid escalating the dispute online, and identify the law that applies to the conduct.

In Bangladesh, the distinction between a cybercrime complaint under the Cyber Security Act, 2026 and an online defamation complaint under the Penal Code is particularly important in 2026. Choosing the correct procedure can help prevent unnecessary delays and confusion.

If you are unsure whether an incident amounts to hacking, cyber fraud, blackmailing, online harassment, identity misuse, or defamation, obtaining advice from a qualified legal professional before filing can help you understand your available options.