International layer
Every local index stops at a national line. A person, a stolen object, or an identity does not. This is the international layer: INTERPOL's notice system, Europol, and the databases that a domestic search never touches. Some are open to anyone; most are police-only, and saying which is which is half the value.
INTERPOL does not have its own police force and cannot arrest anyone. Its power is a set of notices: coded requests passed between the member countries' police. The colour tells you the request:
| Notice | What it asks | Public? |
|---|---|---|
| Red | Locate and arrest a wanted person, with a view to extradition. The one most people mean by "Interpol wanted list." | Public search |
| Yellow | Locate a missing person, or help identify a person who cannot identify themselves. The missing-persons notice. | Public for missing |
| Blue | Collect more information about a person's identity, location, or activities — not an arrest request. | Mostly police |
| Black | Seek information on unidentified bodies. | Mostly police |
| Green | Warn about a person's possible criminal activity, as a preventive alert. | Mostly police |
| Orange | Warn about a hidden danger — a weapon, a parcel, a substance, an act. | Police / public advisories |
| Purple | Share a criminal method (modus operandi) so other countries can spot it. | Mostly police |
A missing person or a stolen object is often not a local matter. The reason a domestic search can fail while the person is findable is that the index it checked is national and the record is international. The reverse is also true: an international hit has to be brought back to a local actionable step — report it to the police in the right jurisdiction, because INTERPOL cannot act on your behalf and a notice is a request between police, not a warrant you can execute.
So the honest framing is not "Interpol will find them." It is: here are the international layers, here is which ones you may read, and here is the local step each one feeds. That is the part most pages get wrong.
Checked 2026-10-13. The INTERPOL notice and database pages responded; the public works-of-art database and the FBI pages block automated checks and are best opened directly in a browser. This page names the layers — it does not query them or mirror their data.