An Interpol diffusion is a request one country’s police send directly to other countries through Interpol’s network, asking them to locate, arrest, or gather information on a named person. It is sent by the requesting country’s National Central Bureau straight to the bureaus of other member states, before Interpol’s General Secretariat has reviewed it.1INTERPOL. About Notices That immediacy is what makes a diffusion useful to investigators and dangerous to the person named in one. Interpol has 195 member countries, and a diffusion can reach any or all of them within minutes.
Diffusion vs. Red Notice
A Red Notice is published by Interpol’s General Secretariat only after its Notices and Diffusions Task Force has reviewed and authorized the request. Until that review is complete, a pending Red Notice is not visible to member countries and cannot be searched.2INTERPOL. Compliance and Review
Diffusions run the other direction. The requesting country’s bureau transmits the diffusion directly, and other bureaus receive it by email right away. Those emails carry a warning that the diffusion is still subject to legal review and has not yet been authorized by the General Secretariat.2INTERPOL. Compliance and Review In practical terms, a diffusion is active in the field before anyone at Interpol headquarters has confirmed it meets the rules.
There is also a difference in thresholds. Under Article 83 of Interpol’s Rules on the Processing of Data, a Red Notice cannot be published to enforce a sentence of less than six months, and it cannot be issued for prosecution unless the offense carries at least two years of potential imprisonment. Diffusions have no equivalent codified minimum, which is one reason requesting countries sometimes choose a diffusion over a Red Notice.
What a Diffusion Can and Cannot Do
A diffusion is not an international arrest warrant. It carries no independent legal authority to arrest, detain, or deport anyone.3U.S. Immigration and Customs Enforcement. INTERPOL Red Notices and Wanted Person Diffusions Whether a country takes any action on a diffusion is governed entirely by that country’s own laws.
Interpol’s General Assembly has called on all member countries to treat both Red Notices and wanted persons diffusions as valid requests for provisional arrest pending extradition, to the extent their national laws allow.4INTERPOL. Resolution No. 10 – Red Notices and Wanted Person Diffusions and Their Use for Provisional Arrest Pending Extradition The resolution expressly leaves each country full discretion over whether and how to act. Some states treat a diffusion much like a Red Notice for arrest purposes; others require additional paperwork before doing anything.
The United States is a useful illustration. ICE Directive 15006.1 prohibits ICE personnel from relying exclusively on a Red Notice or diffusion to justify enforcement action or to support an immigration case. Before taking any enforcement action informed by a diffusion, an ICE officer must get supervisory approval, verify through the U.S. National Central Bureau that the diffusion is still active, and request the underlying documentation such as the foreign warrant or charging documents.3U.S. Immigration and Customs Enforcement. INTERPOL Red Notices and Wanted Person Diffusions Officers are also forbidden from representing or implying that a diffusion is a U.S. arrest warrant.
Travel and Immigration Consequences
Even without the force of a warrant, a diffusion can disrupt your life. Border agencies in many countries check incoming travelers against Interpol’s databases, and a hit can lead to secondary screening, temporary detention, passport confiscation, or denial of entry. In countries that recognize diffusions as a basis for provisional arrest, a routine border crossing can turn into the opening stage of an extradition proceeding.
Immigration consequences cut both ways. ICE’s own policy acknowledges that some countries misuse the Interpol system to target political dissidents, human rights defenders, and journalists, and states that in those cases the existence of a diffusion may actually support the subject’s claim for protection from removal.3U.S. Immigration and Customs Enforcement. INTERPOL Red Notices and Wanted Person Diffusions If ICE intends to use a diffusion in immigration proceedings, the subject must receive copies of the underlying documentation and a reasonable amount of time to contest it. Visa applications can also be affected when consular officers see an Interpol hit.
Rules a Valid Diffusion Must Follow
Every diffusion must concern a matter of criminal policing. Article 3 of Interpol’s Constitution forbids the organization from undertaking any intervention or activity of a political, military, religious, or racial character.5INTERPOL. Constitution of the ICPO-INTERPOL Article 2 requires the organization to operate in the spirit of the Universal Declaration of Human Rights.6INTERPOL. Repository of Practice Articles 2 and 3 The General Secretariat reviews every diffusion after it enters the system and can remove any that violate these rules. The Parliamentary Assembly of the Council of Europe has flagged that this after-the-fact approach means problematic diffusions circulate before anyone catches them.7Parliamentary Assembly of the Council of Europe. Resolution 2161 (2017) – Abusive Recourse to the Interpol System: The Need for More Stringent Legal Safeguards
Diffusions also do not stay in the system forever. Under Articles 49 and 50 of the Rules on the Processing of Data, data is kept for a maximum period set by Interpol’s Executive Committee. At least six months before expiration, the General Secretariat asks the source country whether it still needs the data retained; any extension requires reasons and cannot exceed the original maximum retention period.8INTERPOL. INTERPOL’s Rules on the Processing of Data A source country can also voluntarily suspend a diffusion for up to six months.
How to Check Whether a Diffusion Names You
If you think you may be the subject of a diffusion, you can request access to your data through the Commission for the Control of Interpol’s Files (CCF), the independent body that oversees data processing within the organization.9INTERPOL. Commission for the Control of INTERPOL’s Files – How to Submit a Request As of March 2026, requests must be submitted through a dedicated secure online portal. Email and postal mail are no longer accepted except in exceptional circumstances.
Your request must be written in one of Interpol’s four working languages: Arabic, English, French, or Spanish.10INTERPOL. Admissibility of a Request to the CCF You will need to provide an unredacted copy of a valid identity document showing your name, date of birth, and photograph. If a lawyer or relative is submitting on your behalf, include a signed power of attorney authorizing access to information in Interpol’s files. Requests on behalf of minors require proof of the relationship, such as a birth certificate.
Once the Commission declares your request admissible, it has four months to decide access requests, with extensions possible when the circumstances warrant.11INTERPOL. Procedural Guidelines for Applicants to the Commission for the Control of INTERPOL’s Files Filing itself is free. Hiring counsel is not, and legal fees for Interpol work tend to run high given how specialized it is.
How to Challenge or Delete a Diffusion
If the access response confirms an active diffusion and you believe it should not stand, you can file a request for deletion or correction with the same Commission. The submission must include a concise summary of the facts and an explanation of which Interpol rules were violated, capped at 10 pages.10INTERPOL. Admissibility of a Request to the CCF Attach supporting evidence: court decisions, decisions from other authorities, documentation of political or refugee status, and anything else that shows the diffusion fails to meet Interpol’s standards.
The common grounds for deletion fall into a few categories. Political motivation under Article 3 is the classic argument, where the requesting country is using criminal charges as a pretext to pursue someone for political activity, journalism, or religious beliefs. Lack of criminal character is another, where the underlying conduct does not actually constitute a serious criminal offense. Procedural failures in the requesting country, such as a warrant that has expired or been vacated, also provide grounds for removal.
After declaring the deletion request admissible, the Commission has nine months to decide, with extensions possible in complex cases.11INTERPOL. Procedural Guidelines for Applicants to the Commission for the Control of INTERPOL’s Files If the challenge succeeds, the General Secretariat removes the diffusion from the database and informs all member countries of the deletion.
Emergency Interim Measures
Nine months is a long wait if you are already detained or facing imminent extradition. Under Article 37 of its Statute, the Commission can adopt provisional measures to address emergencies while a deletion case is pending.11INTERPOL. Procedural Guidelines for Applicants to the Commission for the Control of INTERPOL’s Files Qualifying situations include cases where extradition is clearly imminent, the applicant is detained because of data in Interpol’s files, or the applicant holds a protective status such as refugee recognition.
The measures themselves vary. The Commission may block the data, remove it from public-facing systems, or move the case to the front of the queue. Between regular sessions, decision-making authority on urgent requests can be delegated to the Chairperson or a designated member. If a diffusion is causing immediate harm, request interim measures at the same time you file for deletion.
When a Diffusion Is Politically Motivated
Abuse of the system is a documented problem, not a hypothetical one. The Parliamentary Assembly of the Council of Europe has specifically called out the use of diffusions and Red Notices to pursue political opponents and has urged Interpol to adopt stronger safeguards.7Parliamentary Assembly of the Council of Europe. Resolution 2161 (2017) – Abusive Recourse to the Interpol System: The Need for More Stringent Legal Safeguards The underlying structural issue is familiar by now: diffusions circulate before the compliance review happens, so a politically motivated request can trigger detention days or weeks before anyone determines it should never have been issued.
If you have reason to think a diffusion against you is politically motivated, start gathering documentation of that context early. Evidence of political activity, media coverage, asylum decisions, and prior findings by human rights bodies all strengthen a later challenge before the Commission. The sooner that record is built, the more useful it is when extradition or immigration proceedings compress the timeline.