Can Swiss Bank Accounts Be Frozen? Attachment (séquestre) Orders, DEBA Evidence Thresholds & Bank Secrecy Limits

Yes, Swiss bank accounts can be frozen, and the legal machinery to do so is well established. The route, evidentiary burden and scope of any freeze depend on whether the order is a civil attachment (séquestre) under the Federal Debt Enforcement and Bankruptcy Act (DEBA), a criminal or money-laundering hold ordered by prosecutors or the Money Laundering Reporting Office (MROS), or an administrative sanctions freeze imposed by the Federal Council. Switzerland’s reputation for bank secrecy remains strong, yet Article 47 of the Banking Act contains carve-outs that allow courts, prosecutors and regulators to override confidentiality when specific statutory conditions are met.

This guide sets out the mechanics, evidence thresholds and practical steps counsel and creditors need to evaluate before pursuing, or defending against, a freeze of Swiss-held assets.

Quick Answer, Can Swiss Bank Accounts Be Frozen?

Swiss law provides three principal pathways to freeze a bank account. A creditor may obtain a civil attachment order (séquestre) under DEBA Articles 271–281. Swiss prosecutors or MROS may impose a criminal or anti-money-laundering hold. The Federal Council may order a sanctions-based freeze under its foreign-policy powers, as it did on 5 January 2026 in relation to Venezuelan state assets. Each mechanism operates under distinct rules, timelines and evidence requirements, though all ultimately override bank secrecy once a valid order is in force.

If you are a creditor seeking to freeze a Swiss bank account, the core steps are:

1. Identify the debtor’s Swiss banking relationship and, where possible, the specific account or institution.
2. Engage Swiss-qualified counsel to assess whether DEBA attachment grounds are satisfied.
3. Prepare an ex parte application supported by documentary evidence of the claim and the risk of asset dissipation.
4. File the application with the competent cantonal enforcement judge at the location of the assets.
5. Obtain the attachment order and serve it on the bank, which must freeze the specified assets immediately.
6. Commence or validate the underlying enforcement proceedings within the statutory deadline to prevent the order lapsing.

Types of Freezing Orders in Switzerland, Civil, Criminal and Sanctions

Not every account freeze follows the same legal pathway. Understanding the distinction is critical because it determines who may apply, what evidence is needed and how long the freeze can last.

Civil Attachment (DEBA Séquestre), Creditor-Driven

The DEBA attachment, known as séquestre in French-speaking cantons, is the primary tool available to private creditors. Governed by Articles 271 to 281 of the DEBA, it allows a creditor to ask a Swiss enforcement judge to freeze bank accounts, securities and other assets belonging to the debtor. The order is provisional, it preserves assets while the creditor pursues or validates a substantive claim. Both Swiss and non-Swiss creditors may apply, provided they can establish the jurisdictional nexus required under the statute.

Criminal and MROS Holds, State-Driven

Swiss prosecutors may freeze accounts as part of a criminal investigation under the Swiss Code of Criminal Procedure (CrimPC). Separately, where a bank identifies a suspicious transaction, it must file a report with MROS under the Anti-Money Laundering Act. MROS can then order a temporary hold, typically for five working days, while it assesses whether to refer the matter to prosecutors. If a formal criminal investigation follows, the freeze may be extended indefinitely by prosecutorial order. Reforms to the Swiss Code of Criminal Procedure that took effect on 1 January 2024 broadened the circumstances under which banking information may be disclosed to prosecutors and foreign authorities.

Sanctions-Based Freezes and Federal Council Decisions

The Federal Council can order asset freezes by decree under its foreign-policy and sanctions powers. These freezes are administrative in nature, apply immediately and bind all Swiss financial institutions without need for a court order. On 5 January 2026, for example, the Federal Council ordered a freeze of assets linked to the Maduro regime in Venezuela, a measure that took effect across the Swiss banking system without individual court proceedings.

DEBA Attachment Mechanics, Legal Basis and Procedure

The DEBA attachment order is the most commonly used instrument for creditors who wish to freeze a Swiss bank account in a civil context. Its statutory framework is set out in Articles 271–281 of the DEBA.

Statutory Basis: Key DEBA Articles

The core provisions governing attachment are concentrated in a compact set of articles within the DEBA:

• Article 271. Sets out the grounds on which a creditor may request an attachment, including where the debtor has no fixed domicile in Switzerland, where the creditor holds a definitive certificate of shortfall (acte de défaut de biens), or where there is a risk of asset dissipation.
• Article 272. Specifies the substantive requirements: the creditor must demonstrate a probable claim (vraisemblance de la créance) and a ground for attachment under Article 271.
• Article 274. Empowers the enforcement judge to grant the attachment order; the judge may decide ex parte (without hearing the debtor) where urgency demands it.
• Article 278. Provides for opposition by the debtor or affected third parties to challenge the attachment after it has been granted.
• Article 279. Requires the creditor to validate the attachment by commencing substantive enforcement proceedings within a prescribed period, failing which the order lapses.

Who Can Apply

Any creditor, Swiss or foreign, holding a monetary claim against a debtor with assets in Switzerland may apply for a DEBA attachment. Foreign creditors do not need a prior Swiss judgment; the attachment itself is a provisional measure that can be sought before or in parallel with substantive proceedings. Representation by a Swiss-qualified attorney is not formally required in all cantons for the application itself, but as a practical matter, engaging local counsel is essential to navigate cantonal procedural requirements and to ensure effective service on the bank.

Ex Parte (Precautionary) Attachment

The hallmark of the séquestre in Switzerland is its ex parte character. Under Article 274 DEBA, the enforcement judge may grant the attachment order without notifying the debtor in advance. This is the norm rather than the exception, the entire purpose of the mechanism is to prevent the debtor from moving assets before the order takes effect. The creditor files a written application containing:

• A statement of the claim and its legal basis
• The ground for attachment under Article 271 (e.g., debtor has no Swiss domicile, risk of dissipation)
• Identification of the assets to be frozen (bank name, branch, account number or IBAN where known)
• Supporting documentary evidence

Industry observers expect judges in most cantons to decide ex parte applications within hours to a small number of working days, depending on urgency and the completeness of the submission.

Scope of the Order

An attachment order in Switzerland can cover bank account balances, securities held in custody, safe-deposit box contents and any other identifiable assets held by the bank in the debtor’s name. The creditor need not specify the exact account number if the debtor’s identity and the banking institution are sufficiently identified, the bank is then obliged to search its records and freeze any assets matching the order. Where the creditor can supply an IBAN or specific account reference, the process is faster and less likely to be disputed.

Evidence Thresholds and Ex Parte Standards, Asset Freezing Switzerland Requirements

The evidence bar for a DEBA attachment is deliberately lower than the standard for a final judgment. Courts apply a prima facie standard: the creditor must render the claim and the attachment ground “probable” (vraisemblable), not proven to a certainty.

The Civil Standard: Probable Claim and Risk of Dissipation

Under Article 272 DEBA, the applicant must satisfy the judge on two fronts. First, the underlying monetary claim must be rendered probable, meaning the documentary record, taken at face value, supports the existence and quantum of the debt. Second, one of the statutory grounds for attachment under Article 271 must be established. The most frequently invoked ground for foreign creditors is the absence of a Swiss domicile for the debtor, which is treated as a freestanding ground that does not require separate proof of dissipation risk. Where the debtor does have a Swiss domicile, the creditor must show an objective, concrete risk that assets will be removed, hidden or dissipated.

Documentary Evidence Checklist

Swiss courts expect creditors to substantiate their ex parte applications with contemporaneous documentation. The following evidence types are standard in practice:

Burden of Proof and Judicial Discretion

The enforcement judge exercises a broad discretion when assessing an ex parte application. The standard is one of vraisemblance, plausibility, which sits well below the civil balance-of-probabilities standard applied at trial. Judges will generally accept credible documentary evidence without requiring live witness testimony. However, the court must also weigh proportionality: an attachment freezing the entirety of a debtor’s Swiss wealth where the claim is modest may be narrowed in scope.

Common Evidentiary Pitfalls

• Insufficient identification of the account holder. If the debtor’s name or identity cannot be reliably matched to the bank’s records, the order may be unenforceable. Counsel should verify spellings, aliases and corporate structures in advance.
• Failure to link the debtor to the Swiss assets. Asserting that the debtor “may have” Swiss accounts without supporting evidence is unlikely to satisfy even the vraisemblance threshold.
• Stale claims or lapsed limitation periods. Courts will scrutinise whether the underlying claim remains actionable under the applicable substantive law.
• Omission of the attachment ground. Merely showing a valid claim is insufficient, the creditor must also identify and substantiate a specific ground under Article 271 DEBA.

Bank Secrecy Limits and Exceptions, Can Swiss Bank Accounts Be Frozen Despite Confidentiality?

Switzerland’s banking secrecy regime, anchored in Article 47 of the Banking Act, criminalises the unauthorised disclosure of client information by bank employees, agents and auditors. Yet this protection is far from absolute, and it cannot shield assets from a lawful freezing order.

Article 47 of the Banking Act

Article 47 imposes criminal penalties, including fines and imprisonment, on anyone who discloses confidential banking information without legal authority. The provision applies to current and former bank employees, auditors and their auxiliaries. For creditors, the practical implication is that banks will not voluntarily reveal account details in response to informal requests or foreign subpoenas that lack a Swiss legal basis.

Exceptions: Criminal Proceedings, MROS, Mutual Legal Assistance and the 2024 CCrP Reforms

Banking secrecy yields to a range of statutory exceptions:

• Criminal proceedings. Swiss prosecutors may compel banks to disclose account information as part of a formal investigation. The bank must comply once served with a valid prosecutorial order.
• MROS orders. When MROS issues a freeze or information request under the Anti-Money Laundering Act, the bank must respond and may not invoke Article 47 as a defence.
• Mutual legal assistance (MLA). Under the Federal Act on International Mutual Assistance in Criminal Matters, Swiss authorities may transmit banking information to foreign states pursuant to a valid MLA request.
• Swiss Code of Criminal Procedure, 2024 reforms. Amendments that took effect on 1 January 2024 broadened the scope of permissible disclosure in criminal matters, including wider powers for prosecutors to share banking information with foreign counterparts under certain conditions.

Where Secrecy Cannot Block a DEBA Attachment

A DEBA attachment order is a domestic court order issued by a Swiss enforcement judge. Once served on the bank, it overrides the bank’s confidentiality obligations vis-à-vis the debtor. The bank must freeze the identified assets and confirm to the enforcement office that it has done so. The bank is not required to disclose the account balance or transaction history directly to the creditor, but it must report to the enforcement office whether attachable assets exist. The Swiss Bankers Association’s Agreement on Due Diligence (CDB 2020) reinforces banks’ obligation to cooperate with lawful domestic orders, and the bank’s internal compliance function will treat a valid séquestre as a binding instruction.

Foreign letters or requests without a Swiss legal basis, by contrast, do not compel disclosure and banks routinely refuse them.

Cross-Border Enforcement of Foreign Freezing Orders in Switzerland

Creditors holding freezing orders from courts outside Switzerland face a significant practical question: will a worldwide freezing order or a foreign attachment order be recognised and enforced by Swiss institutions?

Enforcement of Foreign Freezing Orders, Recognition Hurdles

Swiss law does not automatically recognise or enforce foreign provisional measures. A worldwide freezing order issued by an English court, for example, has no direct legal effect in Switzerland. Swiss banks are not obliged to comply with foreign court orders that have not been recognised through a Swiss judicial process. Recognition is possible under the Lugano Convention (for EU/EFTA judgments) or bilateral treaties, but provisional and protective measures face additional hurdles, including Swiss public-policy review and the requirement that the foreign order meet Swiss procedural standards.

Worldwide Freezing Orders vs Swiss Attachment

The practical difference is critical. A worldwide freezing order binds the party (in personam), but it does not create a right in rem over Swiss-held assets. A Swiss DEBA attachment, by contrast, operates in rem: once the order is served on the bank, the assets are frozen as a matter of Swiss law. For this reason, creditors who obtain a foreign freezing order are routinely advised to seek a parallel DEBA attachment in Switzerland to secure actual preservation of the assets. Relying on the worldwide order alone carries a real risk that the Swiss bank will not comply.

How Non-Swiss Creditors Can Proceed

The recommended pathway for a foreign claimant seeking to freeze a Swiss bank account is:

1. Seek a provisional DEBA attachment in the competent Swiss cantonal court. This is the most direct route to an enforceable freeze. The creditor’s foreign status is itself an attachment ground under Article 271 DEBA where the debtor lacks a Swiss domicile.
2. Pursue disclosure through MLA or letters rogatory if account details are unknown. Where the creditor lacks sufficient banking intelligence, a mutual legal assistance request or letter rogatory via diplomatic channels may be necessary to obtain identifying information.
3. Consider Swiss-based asset tracing orders. Swiss counsel can advise on the availability of information orders and other investigative tools to identify and locate the debtor’s assets before or in parallel with the attachment application.

Practical Creditor Checklist, Timelines and Costs

Pre-Filing Checklist, 10 Points

1. Confirm the existence and quantum of the monetary claim
2. Identify the debtor’s Swiss banking relationship (institution, branch, account references)
3. Verify the debtor’s domicile (Swiss or foreign, this affects the attachment ground)
4. Assemble documentary evidence (contracts, demand letters, transaction records)
5. Prepare a sworn factual affidavit summarising the claim and urgency
6. Engage Swiss-qualified counsel in the canton where the assets are held
7. Draft the attachment application specifying the assets and the DEBA ground
8. Assess whether security will be required and budget accordingly
9. Consider parallel preservation steps (e.g., foreign freezing order, MLA request)
10. Plan the validation strategy, identify the substantive proceedings that will be commenced to prevent the attachment lapsing under Article 279 DEBA

Timelines: Expected Court and Bank Action

Costs and Security

The enforcement judge may require the creditor to post security (sûretés) as a condition of the attachment, particularly where the claim is large or the debtor contests the order. Security is intended to compensate the debtor for losses if the attachment is later found to have been unjustified. Court fees and counsel costs vary by canton but are generally proportionate to the amount at stake. Creditors should budget for both the attachment phase and the substantive validation proceedings.

Risks, Bank Responses and Remedies to Unblock Accounts

Banks served with a DEBA attachment will freeze the specified assets and report compliance to the enforcement office. In some cases, a bank’s internal compliance function may independently impose a hold pending MROS guidance, adding a separate layer of restriction. Debtors may challenge the attachment by filing opposition under Article 278 DEBA, arguing that the claim is unfounded, the attachment ground is not satisfied, or the order is disproportionate. If the opposition succeeds, the court will order the release of frozen assets. Interlocutory appeals to the cantonal supervisory authority are also available.

For account holders whose assets have been frozen, the first step is to engage Swiss counsel promptly to assess the legal basis of the freeze and identify the appropriate procedural remedy.

Conclusion, Can Swiss Bank Accounts Be Frozen? Next Steps for Creditors and Account Holders

Swiss bank accounts can be frozen through well-established legal mechanisms, most commonly the DEBA attachment (séquestre) for creditors, but also through criminal, anti-money-laundering and sanctions channels. The evidence threshold for a civil attachment is deliberately manageable, bank secrecy cannot block a valid court order, and foreign creditors have full access to the system. Whether you are a creditor seeking to preserve assets or an account holder responding to a freeze, the critical step is to engage experienced Swiss counsel without delay. For guidance from a qualified practitioner, consult the Global Law Experts lawyer directory.

Sources

1. Debt Enforcement and Bankruptcy Act (DEBA), Fedlex
2. Federal Act on Banks and Savings Banks (Banking Act), Fedlex
3. admin.ch, Federal Council Asset Freeze (5 January 2026)
4. Swiss Bankers Association, CDB Agreement 2020
5. IFLR, Attachment of Assets and Bank Accounts Under Swiss Debt Enforcement Law
6. Prager Dreifuss, Asset Tracing and Freezing Orders
7. HFW, Overview of Debt Enforcement and Freezing Orders Over Swiss Bank Accounts
8. Lalive, Asset Recovery Guide (2024)
9. Centre de droit bancaire et financier (CDBF), Commentary on CCrP Revision (2024)
10. MROS, Swiss Money Laundering Reporting Office