Foreign National Faces Criminal Cases in Turkey and Another Country: Which Case Proceeds First? (2026 Updated Guide)

A foreign national faces criminal proceedings in Turkey and another country. Learn which case may proceed first, how jurisdiction, extradition, detention, travel restrictions and foreign judgments can affect the proceedings.

A foreign national may discover that the same conduct—or closely related conduct—is being investigated simultaneously in Turkey and another country. This can happen in international fraud, cybercrime, money laundering, narcotics, financial crime, corporate investigations, cross-border commercial disputes that develop into criminal allegations, or offenses involving victims and evidence located in several jurisdictions. A common question is: Which country gets to prosecute first? There is no universal rule that the country opening the first investigation automatically receives priority. Turkish proceedings may continue independently if Turkey has criminal jurisdiction. The practical outcome can depend on where the suspect is located, where the alleged offense occurred, nationality, victims, evidence, detention status, extradition proceedings, international judicial cooperation and whether a final foreign judgment already exists.

Can Turkey and Another Country Investigate the Same Person at the Same Time?

Yes. Cross-border conduct can potentially create jurisdiction in more than one country. The existence of a foreign investigation does not automatically prevent Turkish prosecutors from opening or continuing a separate investigation.

This is particularly important for foreign nationals who assume that proceedings abroad mean they cannot also face prosecution in Turkey.

Which Criminal Case Proceeds First?

There is no simple rule giving automatic priority to one country merely because its authorities acted first. In practice, the case that progresses first may depend heavily on where the suspect is physically located and whether that country has custody of the person.

Jurisdiction and physical custody should therefore be analyzed separately.

Does the Country Where the Crime Occurred Have Priority?

The place where the alleged offense occurred is an important jurisdictional factor. If conduct constituting an offense took place in Turkey, Turkish criminal jurisdiction may arise even where the suspect is a foreign citizen.

Cross-border offenses can be more complicated because different elements may occur in different countries.

What If Only Part of the Alleged Crime Occurred in Turkey?

This requires a detailed jurisdictional analysis. For example, communications may originate abroad while money is transferred to Turkey, a victim may be located in Turkey, or a transaction may involve Turkish bank accounts.

The location of each alleged act and result should therefore be mapped carefully.

Nationality Can Also Matter

Jurisdiction is not determined solely by territory. Depending on the alleged offense and circumstances, nationality of the suspect or victim and other jurisdictional principles may also become relevant.

A foreign national should therefore not assume that leaving Turkey automatically eliminates Turkish criminal exposure.

Where the Suspect Is Located Can Be Decisive in Practice

If the foreign national is physically present in Turkey and detained here, Turkish authorities may be able to continue the domestic criminal process while another country simultaneously seeks extradition or judicial cooperation.

If the person is abroad, the procedural situation may be very different.

What If the Foreigner Is Arrested in Turkey?

The first priority is determining the legal basis for the arrest or detention. The person may be wanted because of a Turkish criminal investigation, a Turkish court warrant, an international request or a combination of these.

These possibilities should not be treated as interchangeable.

A Turkish Arrest Warrant and an International Request Are Different

A foreign national may be subject to domestic Turkish criminal proceedings while another country is also seeking the person’s surrender.

The defense should identify every active file separately.

Can Another Country Request Extradition From Turkey?

Potentially, subject to Turkish law, applicable international agreements and the circumstances of the request. Extradition is not simply an administrative transfer between police authorities.

Legal conditions and procedural protections must be considered.

Does an Extradition Request Automatically Stop the Turkish Criminal Case?

Not necessarily. The existence of an extradition request does not by itself mean that domestic Turkish proceedings disappear.

The relationship between the Turkish case and foreign request must be assessed according to the specific procedural situation.

Can Turkey Decide to Complete Its Own Proceedings First?

Depending on the circumstances, domestic criminal proceedings and the person’s status in Turkey can materially affect when or whether surrender to another jurisdiction occurs.

There is no reliable general rule that the requesting foreign country always goes first.

Can the Foreign Country Continue Its Case While the Person Is in Turkey?

Potentially. Foreign authorities may continue gathering evidence, taking statements, obtaining judicial orders and conducting proceedings according to their own law even though the accused is physically in Turkey.

International criminal cases therefore often require coordinated defense strategies in both jurisdictions.

What If the Same Conduct Is Being Prosecuted Twice?

The defense should determine whether the two proceedings genuinely concern the same acts or merely related conduct.

Two cases involving the same business relationship, bank accounts or individuals are not necessarily legally identical.

The Exact Charges Must Be Compared

Obtain information concerning the offense alleged in Turkey and the offense alleged abroad. Compare dates, victims, transactions, conduct and legal characterization.

A foreign offense with a similar name may not correspond exactly to the Turkish offense.

Does Double Jeopardy Automatically Stop One Case?

Not automatically. Cross-border application of protections against repeated prosecution can involve complex questions concerning whether there is a final judgment, whether the conduct is genuinely the same and which domestic or international rules apply.

The issue should therefore be analyzed specifically rather than assumed.

A Foreign Investigation Is Different From a Foreign Final Judgment

The fact that another country is merely investigating the person is fundamentally different from the existence of a final acquittal or conviction abroad.

The stage of the foreign proceeding should always be established.

What If the Foreigner Has Already Been Convicted Abroad?

A prior foreign conviction may become highly significant, but its effect in Turkey depends on the offense, jurisdictional basis and applicable Turkish rules.

Obtain the complete foreign judgment rather than relying on an online case summary or police record.

What If the Foreigner Was Acquitted Abroad?

A foreign acquittal should be brought to the attention of Turkish defense counsel immediately. The underlying judgment, evidence and procedural status should be examined to determine its relevance to the Turkish proceedings.

Do not assume that a foreign acquittal automatically closes the Turkish file without legal analysis.

Foreign Judgments Should Be Properly Documented

The defense may need the final judgment, confirmation of finality and appropriate translation or authentication depending on how the document will be used.

Obtaining these documents can take time, so the process should begin early.

Evidence From the Foreign Case Can Be Important in Turkey

Foreign proceedings may contain witness statements, bank records, forensic reports, expert evidence, digital evidence or judgments that materially affect the Turkish case.

The defense should identify potentially exculpatory evidence rather than focusing only on the foreign indictment.

Can Turkish Prosecutors Obtain Evidence From Another Country?

International judicial cooperation mechanisms can potentially be used to obtain evidence located abroad.

This may include financial records, witness evidence, corporate information or other materials depending on the relevant legal framework and country involved.

Can the Defense Ask for Foreign Evidence to Be Obtained?

Potentially. Where foreign evidence is material to the defense, its relevance should be explained clearly and appropriate procedural requests considered.

For example, records held abroad may show that the accused was not the person controlling an account or device.

Digital Evidence Creates Particular Cross-Border Problems

A phone may be seized in Turkey while cloud data are stored abroad. Communications may involve foreign platforms and servers in multiple countries.

The defense should distinguish the physical device, user account, stored data and source from which each piece of evidence was obtained.

Bank Transfers Can Create Proceedings in Several Countries

International fraud and money-laundering cases frequently involve a victim in one country, bank account in another, suspect in Turkey and funds transferred through several jurisdictions.

A transaction-by-transaction chronology can be essential.

Prepare a Cross-Border Evidence Map

For complex cases, create a table identifying each alleged transaction, date, country, account, sender, recipient, device, witness and corresponding criminal file.

This can reveal whether the two prosecutions genuinely concern identical conduct.

What If the Foreign Case Contains Evidence Favorable to the Defendant?

Preserve it immediately. Witness statements, expert findings, account records or court findings from the foreign proceeding may potentially support the Turkish defense.

The documents should be obtained from reliable official sources where possible.

What If Statements in the Two Cases Conflict?

A witness may provide one account abroad and another in Turkey. Such inconsistencies can be significant.

The defense should obtain the complete statements and compare context, questions, translation and dates rather than relying on isolated quotations.

Interpreter Problems Can Affect Cross-Border Cases

Foreign nationals may give statements in several countries through different interpreters. Translation errors can materially alter apparently inconsistent accounts.

Where necessary, original-language records should be compared with translated versions.

Should the Foreigner Give the Same Statement in Both Countries?

A foreign national should not attempt to coordinate statements informally without understanding the evidence and procedural rights in each jurisdiction.

Statements made in one country may later become relevant in another.

The Right to Remain Silent Should Be Considered Separately

Rights during questioning depend on the jurisdiction and procedural stage. A decision to provide a statement should be made after understanding the allegations and potential cross-border consequences.

What If the Person Is Wanted Through Interpol?

An Interpol notice or diffusion may affect international travel and detention risk, but it is not the same thing as a final criminal conviction.

The underlying national warrant and international request should be examined separately.

Can Turkey Impose a Travel Ban While the Foreign Case Continues?

Potentially, where the requirements of Turkish criminal procedure are satisfied. A foreign national involved in a Turkish investigation may face restrictions affecting international travel even though another country is also conducting proceedings.

Passport Measures Can Create Additional Problems

Where a passport is held or travel becomes restricted, the defense should identify the precise legal basis and determine whether review or lifting of the measure can be requested.

This can be especially important for foreign businesspeople and residents.

Detention Should Be Evaluated Independently

The existence of a foreign criminal case should not automatically be treated as sufficient justification for detention in the Turkish case.

The legal grounds supporting any Turkish detention measure should be examined independently.

Foreign Residence Can Affect Flight-Risk Arguments

Prosecutors may argue that a foreign defendant with substantial ties abroad presents a greater risk of leaving Turkey. The defense may respond with evidence concerning residence, family, business activities, compliance with previous summonses and other circumstances.

Nationality alone should not replace an individualized assessment.

Alternative Judicial Measures May Be Relevant

Depending on the case, alternatives to detention may need to be considered. The appropriate defense should address the actual risks relied upon by the authorities.

What If Both Countries Want the Person?

This is one of the most complicated situations. The relevant authorities may need to consider domestic proceedings, extradition requests, custody status, international obligations and other factors.

The defendant should have coordinated legal representation rather than responding independently to each authority.

Never Ignore the Turkish Case Because Lawyers Are Handling the Foreign Case

A lawyer abroad may not automatically protect procedural rights in Turkey.

Turkish deadlines, detention proceedings, evidence rules and judicial measures require separate attention.

Likewise, Do Not Ignore the Foreign Case

A successful defense in Turkey may not automatically terminate proceedings abroad.

The two legal teams should exchange relevant information lawfully and maintain a consistent factual understanding of the case.

Corporate Investigations Require Additional Coordination

Where the accused is a foreign company director, executive or employee, internal company documents may become relevant in both jurisdictions.

Companies should preserve emails, authorization records, payment approvals, board materials and compliance records.

Avoid Destroying or Altering Records

Once criminal proceedings are known, relevant evidence should be preserved. Deleting messages, changing corporate records or attempting to reconstruct documents retrospectively can create additional legal problems.

What If the Turkish Case Ends First?

The final Turkish decision may become relevant to the foreign proceeding, but its effect depends on the foreign jurisdiction’s law and applicable international rules.

Obtain certified documentation of the result.

What If the Foreign Case Ends First?

Provide the result to Turkish defense counsel promptly. The legal significance of a foreign acquittal, conviction or dismissal should be assessed in the context of the Turkish case.

Sentences Served Abroad May Become Relevant

Where the person has already been convicted and punished abroad for conduct connected with the Turkish proceedings, the foreign sentence and actual enforcement history should be documented carefully.

The interaction between foreign punishment and Turkish proceedings requires case-specific analysis.

Immigration Consequences Should Also Be Considered

A foreign national facing a serious Turkish criminal investigation may encounter separate immigration consequences, depending on the circumstances.

Criminal defense and immigration strategy should therefore be coordinated where necessary.

Immediate Defense Strategy

A foreign national facing criminal proceedings in Turkey and another country should immediately identify every active investigation and court file, determine the exact allegations in each country, establish whether any domestic or international warrants exist, compare the alleged acts, obtain foreign judgments and evidence, document detention and travel restrictions, preserve digital and financial evidence, coordinate lawyers in both jurisdictions and analyze extradition and international judicial-cooperation issues before making substantive statements.

Frequently Asked Questions

Does the country that starts the criminal case first automatically have priority?

No. There is no universal rule that the first country opening an investigation automatically prosecutes first.

Can Turkey prosecute a foreigner while another country is prosecuting the same person?

Potentially, yes, if Turkish criminal jurisdiction exists. Whether the proceedings concern legally identical conduct must be examined separately.

Does an extradition request automatically stop the Turkish case?

Not necessarily. Domestic proceedings and extradition are separate legal processes whose interaction depends on the particular circumstances.

Can a foreign acquittal end the Turkish case?

It may be highly relevant, but its effect depends on the facts, legal basis and applicable rules. The complete final foreign judgment should be examined.

Can evidence from the foreign criminal case be used in Turkey?

Foreign evidence may potentially become relevant, subject to Turkish procedural and evidentiary rules and the manner in which it is obtained and presented.

Can Turkey obtain foreign bank records?

International judicial cooperation mechanisms may potentially be used to seek evidence located abroad.

What happens if both Turkey and another country seek custody of the defendant?

The situation can involve domestic proceedings, extradition law and international cooperation. There is no automatic universal priority rule.

Can the foreign defendant be detained in Turkey because they live abroad?

Foreign residence may be considered in assessing procedural risks, but detention should be evaluated according to the legal requirements and individual circumstances.

Should lawyers in both countries coordinate?

Yes. Statements, evidence and procedural decisions in one jurisdiction may affect the other case, making coordinated defense particularly important.

What should the foreign national do first?

Identify exactly why each country claims jurisdiction, obtain the allegations and procedural decisions in both cases, determine whether any arrest or extradition requests exist and avoid making uncoordinated statements before the cross-border consequences have been assessed.

Client-Focused Legal Support for Cross-Border Criminal Cases in Turkey

Foreign nationals facing simultaneous criminal proceedings may encounter Turkish arrest warrants, detention, international evidence requests, Interpol measures, extradition proceedings, foreign judgments, travel restrictions and parallel investigations in multiple jurisdictions. Fırat Fesih Kaya Law Office assists foreign suspects and defendants facing cross-border criminal proceedings in Turkey. Lawyer Fırat Fesih Kaya provides legal assistance in reviewing Turkish criminal files, coordinating foreign evidence and judgments, challenging detention and judicial measures, evaluating extradition issues and developing a coordinated defense strategy for international criminal cases.

Phone: +90 312 434 22 22
Mobile: +90 532 769 22 22
Email: info@firatfesihkaya.av.tr
Address: Mevlana Boulevard No:221, Yıldırım Tower, Office No:148, 06520 Balgat, Çankaya, Ankara, Turkey