Mutual Legal Assistance Treaties: Poland’s Cooperation

Mutual Legal Assistance Treaties: Poland’s Cooperation

A mutual legal assistance treaty Poland relies on is a legal framework that allows Polish authorities to request or provide evidence, procedural assistance, and other forms of support in criminal matters across borders. In practice, MLAT mechanisms are used when evidence, assets, witnesses, data, or suspects are connected with more than one jurisdiction. For companies and individuals, this often means that a case handled in Poland can quickly expand into several countries, with direct effects on investigations, compliance, reputation, and litigation strategy.

In cross-border criminal matters, mutual legal assistance is not based on one source only. Poland uses bilateral treaties, multilateral conventions, European Union instruments, and domestic procedural law. The legal basis depends on the state involved, the type of evidence sought, and whether the matter concerns EU or non-EU cooperation [1][2][4].

What MLAT means in practice in Poland

MLAT is a practical tool of international cooperation in criminal cases. It is commonly used to obtain:

• banking and financial records,
• corporate documents,
• witness testimony,
• service of procedural documents,
• search and seizure assistance,
• freezing or confiscation of assets,
• digital and cross-border evidence.

In Poland, the main domestic procedural framework is the Code of Criminal Procedure, in particular the provisions on international cooperation in criminal matters [1]. Depending on the case, cooperation may also involve prosecutors, courts, the Police, the Internal Security Agency, customs and tax authorities, or financial intelligence bodies.

From a business perspective, MLAT activity usually appears in cases involving fraud, corruption, tax crime, money laundering, market abuse, sanctions-related conduct, and cyber incidents. Even where a company is not the target, it may receive requests for records, employee data, transaction documentation, or IT materials. That creates legal risk and operational pressure at the same time.

Mutual legal assistance treaty Poland – key legal bases

When Poland cooperates with other jurisdictions, the applicable instrument depends on the relationship with the requesting state.

Cooperation within the European Union

Within the EU, mutual legal assistance has been significantly streamlined. In many cases, classical MLA has been replaced or supplemented by mutual recognition instruments. One of the most important is Directive 2014/41/EU regarding the European Investigation Order in criminal matters, implemented in Poland through national law [4].

The European Investigation Order is often faster than traditional treaty-based assistance because it uses standardized forms and deadlines set by the applicable framework. It can be used to gather evidence located in another EU Member State, including hearing witnesses, obtaining documents, and securing digital materials.

Cooperation outside the European Union

Outside the EU, Poland often relies on the European Convention on Mutual Assistance in Criminal Matters of 1959 and its additional protocols, as well as bilateral treaties where applicable [2]. In some cases, assistance may also be based on the United Nations Convention against Transnational Organized Crime or the United Nations Convention against Corruption [5][6].

If no treaty applies, cooperation may still be possible on the basis of reciprocity and domestic law, although this tends to be more complex and less predictable. The legal route must be checked case by case.

How requests for cross-border evidence are handled

A request for cross-border evidence must generally identify the authority making the request, the legal classification of the offense, the factual background, the assistance sought, and the relevance of the requested material. Polish authorities examine both formal and substantive conditions before executing the request.

Important practical issues include:

1. whether the requested act is permissible under Polish law,
2. whether the request is sufficiently specific,
3. whether procedural rights are respected,
4. whether secrecy, privilege, or data protection rules apply,
5. whether dual criminality is required in the given framework.

For businesses, timing is critical. Once a request reaches Poland, local branches, subsidiaries, management board members, or compliance teams may have little time to react. Early legal review helps assess whether the request is valid, what can be disclosed, what must be protected, and whether parallel obligations exist in another jurisdiction.

Grounds for refusal or limitation

Poland does not execute every foreign request automatically. Refusal or limitation may result from statutory or treaty-based obstacles. The exact grounds depend on the legal instrument used, but three recurring exceptions are particularly important:

• the request concerns an offense treated as political or closely connected with a political offense under the applicable instrument,
• execution would prejudice sovereignty, security, public order, or other essential interests of the requested state,
• the request would conflict with fundamental legal principles or procedural guarantees.

These exceptions must be assessed carefully and in context. Their application is never purely automatic. Authorities typically consider the nature of the alleged conduct, the proportionality of the requested measures, and compatibility with domestic procedural standards [2][5][6].

Business risk in international cooperation cases

MLAT and related international cooperation measures can materially affect a company before any formal charges are filed in Poland. The main risks usually include:

• business disruption caused by document collection or searches,
• exposure of management decisions to criminal scrutiny,
• asset freezing and blocked transactions,
• regulatory reporting duties, especially in AML matters,
• parallel investigations in several countries,
• reputational harm if the matter becomes public.

These cases are rarely limited to procedure alone. They often require coordination between criminal defense, internal investigation, data protection, employment law, and public communication. A poorly managed response can increase both legal exposure and reputational cost.

MLAT, Interpol, and extradition – different instruments, different purposes

MLAT should not be confused with Interpol mechanisms or extradition. Although these areas often overlap in practice, they serve different purposes.

• MLAT concerns evidence and procedural assistance.
• Interpol supports international police cooperation and information exchange.
• Extradition concerns the surrender of a person for prosecution or sentence enforcement.

One case may involve all three at once. For example, a prosecutor may seek banking records through mutual legal assistance, circulate data through Interpol channels, and simultaneously pursue surrender proceedings. Legal strategy therefore needs to address the broader international picture, not one instrument in isolation.

Why early legal assessment matters

In cross-border criminal matters, the first procedural step often shapes the entire case. Errors in document production, internal communication, or witness handling may be difficult to reverse later. This is especially relevant where foreign and Polish authorities are exchanging information in parallel.

Kopeć & Zaborowski (KKZ) handles matters involving criminal law, white-collar crime, cross-border evidence, compliance, and reputation-sensitive disputes. In practice, this includes reviewing the legal basis of foreign requests, assessing procedural safeguards, protecting privileged material, and coordinating a response that matches both litigation and business needs.

This is informational material, not legal advice. The applicable legal basis and available remedies depend on the factual situation, the requesting state, and the instrument used.

If a cross-border criminal case involves evidence requests, international cooperation, or other serious criminal allegations, it may be useful to discuss the matter with a lawyer. A timely legal assessment can help clarify the procedural position, identify immediate risks, and outline possible next steps under Polish law.

FAQ – Mutual Legal Assistance Treaties: Poland’s Cooperation

1. What is a mutual legal assistance treaty Poland uses most often?

There is no single treaty used in all cases. Within Europe, Poland frequently relies on the 1959 European Convention on Mutual Assistance in Criminal Matters and, in EU cases, on the European Investigation Order framework. Bilateral treaties may also apply depending on the state involved [2][4].

2. Can Polish authorities obtain bank records from another country through MLAT?

Yes, if the relevant treaty, convention, or EU instrument permits it and the request meets legal requirements. Banking information is a common form of cross-border evidence in fraud, corruption, and money laundering cases.

3. Can Poland refuse a foreign MLA request?

Yes. Refusal may occur if a treaty-based or statutory ground applies, including essential state interests or conflict with fundamental legal principles. Depending on the applicable instrument, requests concerning offenses treated as political may also be restricted or refused [2][5][6].

4. Is MLAT the same as extradition?

No. MLAT concerns assistance in obtaining evidence or performing procedural acts. Extradition concerns surrendering a person to another state. They may occur in parallel but remain separate legal procedures.

5. Does MLAT apply only to serious organized crime cases?

No. It is commonly used in white-collar crime, fraud, corruption, tax matters, cybercrime, and asset tracing. The key factor is the cross-border nature of the evidence or conduct, not only the category of offense.

6. What should a company do if it learns that foreign authorities are seeking evidence in Poland?

The company should promptly secure documents, preserve data, assess privilege and confidentiality issues, and obtain legal review of the request and response process. Parallel obligations in other jurisdictions should also be checked.

Bibliography

[1] Act of 6 June 1997 – Code of Criminal Procedure, Journal of Laws 1997 No. 89 item 555, as amended.

[2] European Convention on Mutual Assistance in Criminal Matters, Strasbourg, 20 April 1959.

[3] Constitution of the Republic of Poland of 2 April 1997.

[4] Directive 2014/41/EU of the European Parliament and of the Council of 3 April 2014 regarding the European Investigation Order in criminal matters.

[5] United Nations Convention against Transnational Organized Crime, adopted by General Assembly resolution 55/25 of 15 November 2000.

[6] United Nations Convention against Corruption, adopted by General Assembly resolution 58/4 of 31 October 2003.