Rights of the Person Affected by Mutual Legal Assistance
Procedural rights of persons targeted by an international MLA request in Switzerland: information, participation and remedies.
Last updated : 2026-04-16
Rights of the Affected Person
International mutual legal assistance may seriously affect the rights of targeted persons. The IMAC provides procedural safeguards to protect these individuals.
Right to Information (Art. 80b IMAC)
The person affected by an MLA measure must be informed of the existence of the request, unless the information risks compromising the investigation. Information must be provided at the latest at the time of the closing decision.
Right to Participate (Art. 80b Para. 2 IMAC)
The affected person has the right to participate in the execution of MLA measures. They may notably:
- Attend hearings
- Participate in the sorting of documents
- Submit observations
Right of Appeal (Art. 80e IMAC)
The affected person may appeal the closing decision (the decision ordering the transmission of documents to the requesting state) before the Federal Criminal Court (FCC) within 30 days.
Appeal to the Federal Supreme Court is only available in particularly important cases (art. 84 FSCA).
Right to a Lawyer
The affected person has the right to be assisted by a lawyer throughout the MLA procedure. This assistance is particularly important for document sorting and filing appeals.
Data Protection
The transmission of personal data under MLA is subject to the speciality principle: the requesting state may only use the data for the offence mentioned in the request. Switzerland may attach conditions of use to the transmission.
Limits on Participation
In certain cases, the affected person's participation may be limited to protect the foreign investigation or witness safety. Such limitations must be proportionate and reasoned.
Frequently Asked Questions
Is the affected person informed of an MLA request?
Yes, in principle (art. 80b IMAC). Information may be deferred if it risks compromising the investigation, but must be given at the latest at the time of the closing decision.
Can an MLA measure be challenged?
Yes. An appeal may be filed with the Federal Criminal Court within 30 days of notification of the closing decision (art. 80e IMAC).
Editorial note
This article is provided for general information on Swiss law. It does not constitute legal advice and is no substitute for consulting a professional.
Related articles
International Mutual Legal Assistance in Criminal Matters
Overview of international mutual legal assistance in criminal matters in Switzerland: IMAC, conditions, procedure and the role of the FOJ.
Extradition in Switzerland: Conditions and Procedure
Extradition procedure in Switzerland: conditions, grounds for refusal, rights of the person sought and role of the Federal Criminal Court.
Transmission of Banking Data in International Assistance
Transmission of banking data under international mutual legal assistance: conditions, banking secrecy and data protection.