What is a National Central Bureau (NCB)?

Most people encounter the term "National Central Bureau" only when something has already gone wrong. A border officer finds a hit. A bank account is frozen without explanation. A visa application is declined and no reason is given. Behind each of these moments, an NCB is almost always part of the chain.

A National Central Bureau (NCB) is the designated national contact point through which a member country communicates with INTERPOL's General Secretariat and with the NCBs of other member states. Every INTERPOL member country operates one. The NCB is the mechanism by which a state requests, receives and acts upon INTERPOL notices and diffusions – including Red Notices. It is not a court, not a prosecutor, and not an independent body. It is an administrative gateway, staffed and controlled by the requesting state's own authorities.

This page explains what an NCB does, how it connects to Red Notices and diffusions, and why the distinction matters if you are facing one. As of mid-2025, the NCB system remains the primary channel through which national law enforcement engages with INTERPOL's data infrastructure.

What does a National Central Bureau actually do?

The NCB sits at the junction between a member state's domestic law enforcement and INTERPOL's global communications network. It receives requests from national prosecutors and police, assesses them against INTERPOL's rules, and submits the approved data to the General Secretariat for circulation. Equally, it receives incoming alerts from other NCBs and communicates them to the relevant domestic authority.

In practice, an NCB performs several distinct functions. It submits and manages requests for Red Notices and other notice types on behalf of its state. It issues diffusions – direct, bureau-to-bureau alerts that circulate outside the formal notice system. It acts as the recipient when a foreign NCB reports that the subject of a notice has been located. And it receives the response when INTERPOL or the CCF takes a decision on a file.

The quality of the data an NCB submits is a live legal question. INTERPOL's Rules on the Processing of Data (the RPD) impose data-accuracy and data-quality conditions on the information member states provide. Where those conditions are not met, the CCF can direct a correction or deletion. In our data practice, we regularly see files where the underlying information submitted by the requesting NCB contains material errors – errors the CCF has jurisdiction to address.

How does the NCB connect to a Red Notice?

A Red Notice does not originate from INTERPOL itself. It originates from an NCB, which requests that the General Secretariat publish the notice and circulate it to all other member states. The General Secretariat applies a compliance review before publication, but the substantive case – the allegations, the evidence – comes from the requesting state's NCB.

This point carries real weight. A Red Notice is not an arrest warrant and not a judicial decision. It is a request to locate and provisionally detain a person with a view to extradition. No country is obliged to arrest on the basis of a notice alone; each state decides under its own national law. But the notice, once published, affects travel, banking and a range of other practical freedoms – often severely.

Diffusions operate through the same NCB infrastructure but outside the formal notice channel. An NCB issues a diffusion directly to selected bureaus without going through the General Secretariat's publication process. Diffusions are less visible but can be just as disruptive, and they are equally challengeable before the CCF.

In a recent matter (a MENA-origin notice, winter 2024), we identified that the requesting NCB had submitted data that contradicted publicly available court records in the country of origin. That factual discrepancy formed the core of a successful CCF deletion request. The NCB had, in effect, submitted a file that did not survive scrutiny against its own domestic record.

Why does the NCB's role matter for a challenge?

Understanding that a notice originates from a specific NCB – and not from INTERPOL as an institution – shapes the entire defensive strategy. INTERPOL does not prosecute. It processes data on behalf of member states. That means the attack on a notice is, at its core, an attack on the data the NCB provided.

The CCF reviews that data against the RPD's accuracy and quality requirements, against the data-processing conditions the RPD sets out, and against the constitutional limits in Article 2 and Article 3 of INTERPOL's Constitution. Article 3 bars processing connected to offences of a political, military, religious or racial character. Article 2 requires INTERPOL's activity to respect human rights, in the spirit of the Universal Declaration of Human Rights.

Where the requesting NCB has acted for political reasons, or has submitted data that is false, incomplete or procedurally flawed, those are the grounds the CCF can act on. A deletion or correction request to the CCF is, under the applicable rules, to be decided within nine months of the request being found admissible. There is no appeal against a CCF decision. A weak first file is a real cost.

The steps below are the general picture. Your situation turns on the specific file, the requesting NCB and what data it submitted. That is precisely what an early assessment maps.

To understand whether there are grounds to challenge the data your NCB submitted, or to find out whether INTERPOL holds data about you at all, write to us at info@northlarkfirm.com. The first assessment is confidential.

What is the difference between a notice and a diffusion?

A Red Notice is published by the General Secretariat and circulated to all member states. A diffusion is sent directly by one NCB to one or more other NCBs, without going through formal publication. The distinction matters procedurally but not in terms of the consequences for the individual – both can trigger border stops, banking problems and visa refusals.

In our practice, we see diffusions used where a requesting state wants to move faster than the notice process allows, or where the file would not survive the General Secretariat's compliance review. Both instruments are subject to CCF oversight. The RPD's data-accuracy and data-retention conditions apply equally to diffusion data.

In a cross-border matter involving a CIS-origin diffusion (spring 2025), the requesting NCB had issued the alert after domestic proceedings had already been discontinued. The CCF found the data lacked a valid legal basis. The diffusion was withdrawn. That outcome required evidence – not argument alone – showing the domestic proceedings had closed.

If a prior CCF request was refused, or an earlier defence produced a refusal, a careful second reading can identify what was missed and whether new elements exist. There is no appeal against a CCF decision, so any review must be built on genuinely new material.

For an honest view of whether there are grounds to challenge a notice or diffusion – whether at first instance or on review – reach us through our secure channel. We are available on Signal, Telegram or WhatsApp, and the enquiry form on our site does not require your real name.

Related

• Data Check – find out what INTERPOL holds about you before you travel
• Red Notice Removal – grounds-based CCF challenge to delete or correct a notice
• Article 3 – Political Character – the constitutional bar on politically motivated notices

Frequently Asked Questions

Is this the same as an arrest warrant?

No. A Red Notice is not an arrest warrant and not a judicial decision. It is a request, transmitted through the NCB system, to locate and provisionally detain a person with a view to extradition. No country is legally obliged to arrest on the basis of a Red Notice alone – each state decides under its own domestic law. The confusion between a notice and a warrant is common, and it is a misconception that can lead people to make decisions that are not in their interest.

Who decides the outcome?

For a CCF challenge to the underlying data, the Commission for the Control of INTERPOL's Files decides. It is independent of both INTERPOL's General Secretariat and the requesting state's NCB. It applies the RPD's data-accuracy and processing conditions, and the limits in INTERPOL's Constitution. Its decision is final – there is no appeal – which is why the quality of the file submitted matters enormously. For extradition itself, the courts of the requested state decide under their own national law.

What should I do with this information?

The first step is to know what data INTERPOL holds about you. An access request through the CCF – which is to be answered within four months – tells you whether a notice or diffusion exists and, to the extent disclosed, what it contains. That information shapes every subsequent decision: whether to challenge the notice, how to sequence a CCF request alongside extradition proceedings, and how to address banking or travel consequences. Acting without that baseline is always a disadvantage.

About NORTHLARK

NORTHLARK is an independent international boutique acting for individuals against INTERPOL notices, diffusions and related extradition proceedings before the CCF and in the courts of the requested state. We work in the language of the file and the requesting state. We are not affiliated with any domestic firm, network or parent organisation – a feature that matters directly when the requesting state is one where independence cannot otherwise be guaranteed.

We act only on lawful mandates. We do not help anyone evade legitimate justice, and we take on a matter only where we see genuine grounds.

The first assessment is confidential. Our enquiry form does not require your real name, and you can reach us through a secure channel – Signal, Telegram or WhatsApp – or by writing directly to info@northlarkfirm.com.