The MLAT is the traditional answer to a hard problem: evidence sits in one country, the investigation is in another, and neither country’s courts have straightforward authority over the other’s territory.
How the mechanism works
A mutual legal assistance treaty is an agreement between two states to help each other gather evidence. The path a request takes:
- An investigator in the requesting country prepares a request.
- It goes to that country’s central authority, which reviews it for treaty compliance.
- It is transmitted to the receiving country’s central authority, which in the United States is the Department of Justice Office of International Affairs.
- That authority reviews it and refers it to a domestic prosecutor.
- The prosecutor obtains domestic legal process (a subpoena, order, or warrant) and serves it on the company.
The company is served under its own country’s law, by its own country’s authorities. The foreign origin is largely invisible at the point of service.
Why the speed problem matters
| MLAT request | Direct legal process | |
|---|---|---|
| Who serves the company | Domestic authority | Domestic authority |
| Typical elapsed time | Many months | Days to weeks |
| Foreign authority contacts company directly | No | N/A |
| Legal standard applied | Receiving country’s | Receiving country’s |
The delay is not merely inconvenient. It is the structural pressure behind everything that has been built to route around MLATs, and it is also why fraudulent requests that promise to bypass process find willing audiences. An investigator who has been told an MLAT will take ten months is highly motivated to find another way.
What it means for a company receiving one
The most valuable thing to know is the negative case. A properly executed MLAT does not arrive as a letter from a foreign police force. It arrives as domestic legal process. A document that presents itself as an MLAT request while coming directly from a foreign agency is either a misunderstanding of the mechanism or a fraudulent request, and either way it should not be actioned as compulsory process.
Where a genuine MLAT-derived instrument arrives, it is handled like any other domestic process of that type: validate it, scope it, and produce to the scope.
What is changing
The CLOUD Act enabled bilateral executive agreements that let qualifying foreign governments serve orders on US providers directly, subject to human rights and oversight conditions. The EU’s e-Evidence Regulation creates a comparable intra-EU mechanism with defined response deadlines. Both are attempts to keep lawful access workable at internet speed without abandoning the safeguards that made MLATs slow in the first place.